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Roofing and walling

1. Roofing amp Walling MET Pe ae YSAGHT Roofing and walling User s Guide 2008 9 Esition Date of Issue August 8 2008 This Guide is the 2008 9 edition of Using Lysaght Roofing amp Walling issued on August 8 2008 BlueScope Steel and BlueScope Lysaght may make changes to this Guide in its sole discretion You should check you are using the most up to date version of the Guide before you start construction Conditions of Use If you use this Guide you acknowledge and agree that your use is subject to the terms and conditions in this Guide BlueScope Steel its agents officers employees subcontractors or consultants make no representations either expressed or implied as to the suitability of the information and data in this Guide for your particular purposes It s your responsibility to ensure the design you use is appropriate for your needs the products you have purchased your site and structural limitations and your building and construction capabilities Use of Genuine Materials Structures in this Guide should only be built or constructed using those genuine LYSAGHT or recommended third party products Except as otherwise provide in these terms any warranties only apply to you if at all if you use the recommended genuine LYSAGHT or third party products and method of construction Check Delivery It is important that you check all materials delivered to site against your invoice before you us
2. Figure 9 1 2 Fix the first row of clips Using LYSAGHT Roofing and Walling wa Preparation As described in General installation procedure Section 8 1 e check flatness slope and overhang e orient the sheets before lifting Note the overlapping rib is towards the end of the building where you start Figure 9 1 3 e Check that the overhang of the sheets from the clips at both eaves and ridge is not less than the minimum in Table 2 3 1 e The first and the last supports and clips should be at least 75mm from each end of the sheet to keep maximum holding power Position the first sheet With particular care position the first sheet before fixing to ensure that it will correctly locate in relation to other parts of the building Check that the sheet e is aligned with the end wall or its barge or fascia bearing in mind the type of flashing or capping treatment to be used and e aligns correctly at its ends in relation to the gutter and ridge or parapet or transverse wall Roof sheets should overhang at least 50mm into gutters Fix the first clips KLIP LOK 700 Starting method 1 Cut the 1st clip 25mm from the centre of the second tower as shown The first tower on the cut clip locates in the 1st rib of the first sheet Figure 9 1 2 This method is preferred because you don t have to reach so far to fix the remote end of the clip Starting method 2 The first tower on the first clip locates in the first
3. d you should check with your local workplace health and safety authority to see what safety measures you need to put in place prior to and during construction It is the responsibility of the installer erector to ensure all local safe work practices are adhered to and the safety of the whole site is maintained at all times To ensure maximum lifespan of your building consult your nearest BlueScope Lysaght branch for information regarding maintenance handling storage and any other technical assistance you may require 2008 9 Edition Introduction PART A DESIGN Design preliminaries 2 1 Product selection 2 2 Materials and finishes 2 3 Support spacings 2 4 Maximum lengths of roofing 2 5 Low roof pitches 2 6 Wind forces on roofs 2 8 Codes and performance tests 2 9 Environmental conditions 2 10 Metal and timber compatibility 2 11 Transportation Fasteners 3 1 Materials for screws 3 3 Materials for blind rivets 3 4 Materials for sealing washers 3 5 Identification of screws 3 6 Setting of screws 3 7 Quantity of fasteners and clips 3 8 Recommended fasteners and locations Curved bent amp tapered cladding 4 1 Spring curved ridge roof 4 2 Spring arched roof 4 3 Spring curved concave roofs 4 4 Pre curved roofs 4 5 Capped bent ribbed roofs 4 6 Tapered roofing Insulation amp skylights 5 1 Heat control 5 2 Condensation 5 3 Noise reduction 5 4 Insulation materials 5 5 Insulation thickness 5 6 Skylight
4. e Stainless steel complying with AISI ASTM Type 430 UNS No 843000 2008 9 Edition 2 3 Support spacings The maximum recommended support spacings are shown in Tables 2 3 1 and 2 3 2 They are based on testing in accordance with AS 1562 1 1992 Design and installation of sheet roof and wall cladding Metal and AS 4040 1 1992 Methods of testing sheet roof and wall cladding Resistance to concentrated loads The spacings in the tables for roofs are recommended to produce adequate performance of roof claddings under foot traffic loading incidental for maintenance For walls the following conditions apply e buildings up to 10m high in Region B Terrain Category 3 conditions V 38 m s and V 60 m s C 0 65 for walls C 0 2 and K up to 2 0 in accordance with AS 1170 2 2002 SAA Loading Code Wind loads In all cases cladding is fixed to a support of 1 0mm minimum base metal thickness BMT and minimum yield stress of G550 If you want to use metal battens thinner than 1 0mm seek advice from our information line For support spacings in wind conditions other than those shown refer to our publications on specific products for wind pressure data or other standards which may apply 2 4 Maximum lengths of roofing The valleys or pans of roofing have to carry water to the gutters If in heavy rain the valleys overfill water can flow into the roof through the side laps and flashings Factors a
5. HARDWOOD 10 12x20 M4 8 12x20 Valley 4 fastenerst AL sities MULTILINE 900 Fixing to steel Fixing to timber Fixing to steel gt 0 75 to 3 mm BMT up to 0 75 mm BMT Self drilling screws with wafer head Self drilling self tapping Self drilling self tapping Valley screws with wafer head screws with wafer head fixed 12 12x20 10 16 x 16 soFTWOOD 10 12 x 30 M4 8 12x30 M5 5 1 1x25 M4 8 16x16 HARDWOOD 10 12 X 20 M4 8 12x20 Number of fasteners depends on Valley 3 fasteners ao oo wind iene ees on Do not fix screws Valley 6 fastenerst __ 1 ___ al oe PANELRIB Fixing to steel Fixing to timber up to 3 mm BMT Self drilling screws Self drilling screws Valley with hex washer head with hex washer head fixed 10 16 x 16 SOFTWOOD amp HARDWOOD M4 8 16x16 10 12 X 20 M4 8 12x20 Number of fasteners depends on Valley 4 fasteners ape eee eee ees wind er a on Do not fix screws Roofzips are registered trademarks of ITW Buildex and are recommended for specific applications Using LYSAGHT Roofing and Walling 2008 9 Edition Table 3 8 1 continued Guide to fasteners without insulation SPANDEK and TRIMDEK DESIGN FASTENERS 15 Fixing to steel up to 0 75 mm BMT Fixing to steel gt 0 75 to 3 mm BMT Fixing to timber Roofzips M5 5 1 1x50 OR Self drilling screws with Crest hex washer head EPDM seal fixed Higrip amp shank protection 12 11x50
6. INSTALLATION ENDS OF SHEETS 51 Foam infill commonly used with INTEGRITY Sheeting turned down Depth of Baffle flashing h sheeting Notch over ribs amp fasten to plus underlapping 15 mm sheet Trays turned up A 25 mm min clearance 300 mm Figure 10 5 1 Expansion joint detail Overhang Sheerline gutter fixed to underside of roofing 200 mm centres ON san l ns Steel angle 50 x 50 x 1 2 mm fixed to underside of roofing 200 mm centres Gutter may be fixed to angle Figure 10 6 1 Methods of stiffening roof overhangs Flashings provide the essential weatherproofing at the edges and they sharpen the image of the finished job 2008 9 Edition N r p N i N gz Lu 52 INSTALLATION FLASHINGS 11 Flashings NI Fix at 500 mm centres See Chapter 3 for fasteners 2 3 pan width minimum overlap UUN 150mm minimum overlap C EP Soft aluminium or a L over flashing stepped and tapered to follow g OX fall of roof w KS 8 ee S e i OF es r 7 e 7 CA 150mm A Minimum e Al A Fasten at 500 mm centres See Chapter 3 for fasteners Figure 11 2 1 Typical longitudinal flashings Using LYSAGHT Roofing and Walling Flashings and cappings are strips of metal formed to weatherproof the edges of roofing and walling For the purposes of this chapter only the term flashing
7. Using LYSAGHT Roofing and Walling Radius Radius Width 4 Rise 8 x Rise Figure 4 2 1 Calculation of radius Seal length measured on roof FN ass Seal length 0 035 x Radius x specified minimum roof pitch Custom Orb and Custom Blue Orb min roof pitch 5 Seal length 0 18 x radius Spandek min roof pitch 3 Seal length 0 11 x radius Figure 4 2 2 Seal length for side laps on spring arched roof 2008 9 Edition 18 DESIGN CURVED BENT AND TAPERED ROOFING Roof pitch at the lower end of the sheeting must not be less than the minimum shown in Table 2 3 1 X Figure 4 3 1 Spring curved concave roof Using LYSAGHT Roofing and Walling Profiles with wide pans manufactured from high tensile steel such as KLIP LOK and INTEGRITY 820 are susceptible to local buckling of the pans and are therefore not recommended for spring arched roofs These products can be made specially from soft steel G300 to overcome the problem Each sheet is first fixed to one side of the roof and then pulled down to be fixed to the other side Alternate sheets are laid from opposite sides of the roof 4 3 Spring curved concave roofs Roofing can be spring curved into concave shapes Table 4 3 1 shows the acceptable radii Table 4 3 1 Radii for spring curved concave roofs Minimum radius Purlin spacing m mm KLIP LOK 406 BMT 0 42 24 1000 KLIP LOK 406 BMT 0 48 26 1400 KLIP LOK 406
8. Vertical notching tool KLIP LOK 406 shown Figure 11 3 2 Using notching tools Using LYSAGHT Roofing and Walling Using notching tools After the cladding is fixed and the turn ups finished proceed as follows e Place a flashing with the notch edge resting on the ribs e Locate your notching tool over a rib with the notching head against the flashing VERTICAL TOOL The body locates along the rib HORIZONTAL TOOL the lugs on the underside locates on top of the rib e Raise the handle to open the tool and VERTICAL TOOL lift the flashing into the mouth of the tool HORIZONTAL TOOL slide the mouth of the tool over the edge of the flashing as far as it will go e Push down on the handle to perform the notching e Repeat for all ribs checking in each case that the flashing is correctly positioned e If you are using a horizontal tool bend down the tongues between the notches over a suitable straight edge such as a piece of timber Notching with tinsnips If notching tools are not available flashings can be notched to the rib profile with tinsnips Figure 11 3 3 The procedure is sometimes known as scribing After the cladding is fixed and the turn ups finished proceed as follows e Place the flashing with the turned down edge resting on the ribs e Mark out the notching using a template positioned over each rib e Cut the notches with tinsnips This procedure is also used for hip cappings Fasteners f
9. feet Check alignment periodically Check alignment as described in Section 8 1 General procedure Place the last sheet Assess how the last sheet will fit as described for installation of KLIP LOK Figures 9 1 8 and 9 1 9 Fix a cut starting finishing clip to the purlins Place the last sheet over the starting finishing clips flatten the rib at each purlin and bend the tab of all clips over the rib Lock all ribs All lapped ribs must be locked along their length by button punching at no greater than 900mm centres Figure 9 4 6 You must button punch through the hole in each top fixing clip you locate the clip with the pen mark made previously When operating the punching tool stand on the pan of the overlapping sheet to ensure that the sheets are fully engaged 9 5 Installing LONGLINE 305 walls The installation procedure for walls is similar to that described for roofs Section 9 4 To prevent LONGLINE 305 from sliding downward in the fixing clips you should pierce fix through each sheet under the flashing or capping along the top of the sheets Using LYSAGHT Roofing and Walling INSTALLATION CONCEALED FIXING 43 Figure 9 4 4 Flatten rib for top fixing clips Figure 9 4 5 Placing subsequent sheets Rib o o must touch Ta Figure 9 4 6 Lock all ribs with button punch 30 mm 2008 9 Edition 44 INSTALLATION ENDS OF SHEETS 10 Ends of sheets CUSTOM ORB Figu
10. Self drilling screws with wafer head sortwoon 0 12x35 M4 8 12x35 HARDWOOD 0 12x25 M4 8 12x25 OR Spiral threaded steel nails sortTwoon 3 75 dia x 60 HARDWOOD 3 75 dia x 40 JA KLIP LOK 406 ee a i A D A So t lt C Clip lip LONGLINE 305 WN Clip Note Although both KLIP LOK and LONGLINE are normally used as concealed fixed roofing profiles both may be used as pierce fixed walling profiles provided the length is not greater than 5m If this is done the top girt support must be designed to carry the weight of the cladding Fix at each pan adjacent to the ribs using M4 8 16x16 self drilling screws 10 16x16 Using LYSAGHT Roofing and Walling 2008 9 Edition 14 DESIGN FASTENERS Table 3 8 1 continued Guide to fasteners without insulation MINI ORB Peng teste Fixing to timber up to 3 mm BMT Vaig Ripple Teks screws Ripple Teks screws a 10 16 x 20 SOFTWOOD and HARDWOOD M4 8 16x20 10 16 x 30 M4 8 16x30 Number of fasteners depends on Valley 6 fastenerst ahaaha gt wind Se ele ra on Do not fix screws Valley lI fastenerst remeron rrr rr less than 25mm from the end of sheet MULTICLAD Fixing to steel Fixing to steel i vs up to 0 75 mm BMT gt 0 75 to 3 mm BMT Fixing to timber Self drilling screws Sal drilling screws d Self drilling screws Valley with hex washer head wit ures ea with hex washer head fixed 12 12x20 M4 8 16x16 soFTwooD 0 12x30 M4 8 12x30 M5 5 1 1x25
11. aluminium zinc alloy coated steel complying with AS 1397 2001 COLORBOND steel has either a ZINCALUME or stainless steel base metal with a range of organic coatings to cope with exposure to a range of environments e COLORBOND is prepainted steel for exterior roofing and walling It is the most widely used e COLORBOND METALLIC is prepainted steel for superior aesthetic qualities displaying a metallic sheen e COLORBOND ULTRA is prepainted steel for severe coastal or industrial environments generally within about 100 to 200 metres of the source e COLORBOND STAINLESS is prepainted stainless steel for very severe coastal or industrial environments generally within about 100 metres of the source It is subject to availability and long lead times Check with your local BlueScope Lysaght office for availability of profiles colours accessories and for suitability of the product Tables 2 3 1 and 2 3 2 list general information for profile selection Refer to our publications on specific products for detailed specifications There are also publications on ZINCALUME steel and COLORBOND prepainted steel from our information line Page 1 Material specifications e ZINCALUME aluminium zinc alloy coated steel complying with AS 1397 2001 Minimum yield strengths are G550 550 MPa or G300 300 MPa depending on profile Minimum coating mass is AZ150 150 g m or AZ200 200 g m depending on the product
12. 10 5 Expansion Background on thermal expansion All metals expand and contract with changes in temperature Although steel is by far the least affected of all the metals commonly used for roof and wall cladding the changes in length experienced in very long runs of roofing are significant On a clear hot summer day with no wind the steel temperature in roof cladding can reach approximately 50 C in COLORBOND SURFMIST 60 C in plain ZINCALUME and more than 80 C in COLORBOND NIGHT SKY Examples of the thermal changes in lengths of steel cladding that would result from various temperature changes in the steel are shown in Table 10 5 1 The actual expansion or contraction between the end of a sheet and the last support would only be a fraction of the figures shown because the movement in the length of fixed cladding would normally take place from the centre towards each end of the sheet The movement at each end is thus only half the total expansion or contraction Transverse thermal expansion poses no problems in ribbed cladding because each rib absorbs some transverse movement Expansion joints Thermal expansion effects are mitigated by slight bending of fastener shanks thermal movement of the building structure and slight flexing of the purlins where they are not restrained by cleats or bridging However for very long runs of roofing you should include an expansion joint to overcome linear thermal expansion Table
13. To increase weathertightness BlueScope Lysaght recommends you maximise PM the overlap between flashings and claddings i Fixing of Flashings Transverse flashings shall be fastened in accordance with HB39 1997 as detailed below Profile Recommended Fixing Spacing CUSTOM ORB CUSTOM BLUE ORB Every 4th rib INTEGRITY 820 Every rib KLIP LOK 406 Every rib KLIP LOK 700 HIGH STRENGTH Every rib KLIP LOK MAXIMA Every rib LONGLINE 305 Every rib SPANDEK Every 3rd rib TRIMDEK Every rib The above fastener spacing relates to the stitching of flashings to sheeting It does Figure 11 3 1 not constitute the minimum number of fasteners required to fix the sheeting to purlins Typical transverse flashings Notching tools Hand operated notching tools cut one notch at a time Each tool matches only one cladding profile There are two types of tool their use depends on whether or not the edge of the flashing has first been bent down Figure 11 3 2 Table 11 3 1 Notching tools Edge turned down Type of tool before notching Available for Horizontal notching tools No Availablity subject to inquiry Vertical notching tools KLIP LOK KLIP LOK 700HS SPANDEK also called speed Yes TRIMDEK INTEGRITY LONGLINE 305 notchers CUSTOM ORB CUSTOM BLUE ORB Using LYSAGHT Roofing and Walling 2008 9 Edition 54 INSTALLATION FLASHINGS Ss Horizontal notching tool KLIP LOK 406 shown n P gt NS
14. action between adjacent sheet runs Section 8 2 It is important that excess sealant extruded from an end lap does not enter this cavity because if it does moisture that may have entered the side lap will not be able to drain unimpeded down the roof slope Using LYSAGHT Roofing and Walling INSTALLATION ENDS OF SHEETS 49 Downturn of male rib removed f for length of lap Figure 10 4 2 Remove down turn of male rib when end lapping KLIP LOK 406 LONGLINE 305 Figure 10 4 3 Laying sequence for end lapped sheets Apply 3 mm bead of sealant to underside of overlapping sheet 25 mm from end of sheet Turn sheet over f Apply 3 mm bead of sealant to encapsulate the cut end of the underlapping sheet Figure 10 4 4 Sealing end laps on very low pitched roofs 2008 9 Edition 50 INSTALLATION ENDS OF SHEETS Table 10 5 1 Thermal expansion and contraction of steel cladding Expansion or contraction mm Sheet P length 10 C 50 C 75 C mm change change change 5000 0 6 3 45 10000 1 2 6 9 15000 1 8 9 13 5 20000 2 4 12 18 25000 3 15 22 5 30000 3 6 18 27 Table 10 5 2 Maximum distance between top amp bottom rows of fasteners on a sheet before expansion joint is needed Maximum distance between top and bottom rows of fasteners m Fixing system Pierce fixed 24 through crests Walling pierce fixed in valleys I5 Using LYSAGHT Roofing and Walling
15. day with peak solar radiation of 850 W m transmission through a clear fibreglass skylight would be about 550 W m Translucent fibreglass cladding is available to match CUSTOM ORB INTEGRITY 820 KLIP LOK 406 and 700 LONGLINE 305 SPANDEK and TRIMDEK Polycarbonate cladding is also available for CUSTOM ORB and TRIMDEK On KLIP LOK roofs the translucent cladding should be pierce fixed Using LYSAGHT Roofing and Walling 2008 9 Edition 24 DESIGN ROOF DRAINAGE 6 Roof drainage Eaves gutter design Average recurrence interval 2 Rainfall intensity for site 3 Roof dimensions t Al 5 Catchment area with slope 6 Area for proposed gutter 7 Catchment area per downpipe fee 8 Number of downpipes 9 Locate downpipes amp high points 10 Check catchment area for each downpipe Downpipe size 12 Overflow measures p Using LYSAGHT Roofing and Walling p 6 1 Introduction Roof drainage systems must be designed and detailed by a suitable qualified trade or professional The design of roof drainage aims to protect people property and the building The designed drainage system must be installed under the supervision of a qualified trade or professional Alternatively it must
16. infill under 5 ry Figure 11 7 4 Typical header and sill flashing profile running vertically elevation 11 8 Bushfire protection AS 3959 1999 sets out requirements for the design and construction of buildings in bushfire prone areas It calls for flashings to be bedded on fire resistant insulation material Be sure that flashings fit closely Transverse flashings should be notched or scribed Figures 11 3 1 and 11 8 1 Using LYSAGHT Roofing and Walling INSTALLATION FLASHINGS 61 Corrugated walling 7 Flashing Corner studs INTERNAL LINING Corrugated walling 6 Typical external corner flashing profile running vertically plan INTERNAL LINING INTERNAL LINING Corrugated valine INTERNAL LINING DDS Flashing Corrugated walling Typical re entrant corner flashing profile running vertically plan Figure 11 7 5 Typical corner flashings profile running vertically plan Jamb flashings follow same principle Ridge capping Fire resistant fibreglass or similar Figure 11 8 1 Typical protection from sparks at ridge 2008 9 Edition 62 INSTALLATION FLASHINGS References Australian standards AS 1170 1 2002 SAA Loading Code Dead and live loads and load combinations AS 1170 2 2002 SAA Loading Code Wind loads AS 1170 3 2002 SAA Loading Code Snow loads and the Supplement AS 1170 4 2002 SAA Loading Code Earthquake lo
17. 200 0 80 8 0 838 762 17 5 1 in 12 1800 1800 2600 400 600 2400 3200 3600 400 FLATDEK 7 0 42 6 0 272 250 45 2 1 in 30 2000 2600 3000 150 400 a 5 5 FLATDEK II 7 0 42 5 2 642 620 45 2 I in 30 2400 2800 3200 150 400 gt INTEGRITY 820 0 42 4 6 895 820 48 2 1 in 30 2100 2300 2800 150 300 2600 3400 3600 150 0 48 5 2 895 820 48 1 1 in 50 2500 2550 3050 200 350 2700 3600 3600 200 KLIP LOK 406 5 0 42 49 432 406 41 2 1in 30 1500 1700 2100 200 600 2600 2600 2600 300 0 48 56 432 406 41 1 1in50 1800 2400 3000 200 600 2900 3000 3600 400 0 60 69 432 406 41 1 1in 50 2300 2700 3600 300 900 3000 3400 3600 600 KLIP LOK 700 HI STRENGTH 0 42 4 7 710 700 43 2 1 in 30 1650 1750 2200 150 450 2400 3000 3600 150 0 48 5 3 710 700 43 1 1 in 50 2050 2350 2800 200 500 2700 3300 3900 200 KLIP LOK MAXIMA 0 42 3 2 783 770 31 2 1 in 30 2200 150 450 1900 2100 2400 150 0 48 37 783 770 31 1 1 in 50 1400 1800 2600 200 500 2000 2400 3200 200 0 60 4 5 783 770 31 1 1 in 50 2000 3300 3600 200 500 2900 3300 3900 200 LONGLINE 305 not tapered 0 70 9 7 310 305 48 1 1 in 50 1800 2000 2500 150 450 2700 2700 450 6 SPANDEK 0 42 47 754 700 24 3 1in20 1300 1800 2400 300 600 2500 3000 3300 300 0 48 5 3 754 700 24 3 1 in 20 2000 2200 3000 400 700 3000 3000 3300 400 SPANRIB 0 42 4 6 895 820 48 2 1 in 30 2100 2300 2800 150 300 2600 3400 3600 150 0 48 5 2 895 820 48 1 1 in
18. 5 6 1 It is preferable to use profiled translucent cladding in single Placement of translucent sheets widths so that they can overlap and be supported by the steel pierce fixed decks cladding on both sides It is also preferable to position the lengths of translucent cladding at the top of a roof run so the high end can lap under the capping or flashing and the low end can overlap a steel sheet This is because the translucent PF S S a cladding will readily overlap a steel sheet but the reverse is difficult Lap translucent sheet over steel sheet on both sides Figure 5 6 2 Building regulations require a safety mesh to be fitted under Placement of translucent sheets translucent cladding concealed fixed decks Because of its greater thermal expansion translucent cladding should be fixed using oversized holes and sealing washers recommended by the cladding manufacturer When used with concealed fixed claddings ensure the fasteners do not penetrate the steel cladding There are translucent products available that easily accommodate this Don t exceed the maximum support spacing specified by the translucent cladding manufacturer Skylighting increases the transmission of solar heat Generally speaking heat transmission is proportional to light transmission so the more sunlight that enters a building the hotter it will be Clear uncoloured fibreglass has good light transmission of about 65 but this means on a typical summer
19. 50 2500 2550 3050 200 350 2700 3600 3600 200 TRIMDEK n 0 42 43 816 762 29 2 1in30 1100 1300 1900 150 300 2400 3000 3000 150 0 48 4 9 816 762 29 2 1 in 30 1600 1850 2600 200 350 2700 3000 3000 200 1 Masses are for unpainted zincalume steel 2 Use caution with roof pitch at 1 3 See Section 10 6 for explanation of stiffened 4 With 5 fasteners per sheet per support 5 Clips must be 75 mm from ends of sheets for proper functioning of clips With 4 fasteners per sheet per support 7 FLATDEK FLATDEK II values are given for N4 W5O0N light foot traffic Refer brochure for other wind loading conditions Using LySAGHT Roofing and Walling 2008 9 Edition DESIGN DESIGN PRELIMINARIES 7 Table 2 3 2 Specifications of profiles for walling only Maximum recommended spacing of wall supports BMT Mass eal Cover RID Single End Internal width depth g approx mm kg m mm mm mm mm mm mm EASY CLAD 2PF 300 I 0 42 4 5 330 300 19 2 1500 1500 EASY CLAD 4P 300 0 42 4 5 327 300 12 1500 1500 MINI ORB 0 42 4 0 841 820 6 1200 1500 1500 0 48 4 5 841 820 6 1500 1500 1500 MULTICLAD 0 35 3 3 880 840 12 1400 1800 1800 0 42 3 9 880 840 12 1700 1800 1800 MULTILINE 900 0 35 3 1 901 890 12 1000 1000 0 42 3 7 901 890 12 1000 1000 PANELRIB 0 35 3 2 915 850 4 1100 1200 1200 0 42 3 7 915 850 4 1200 1200 1200 TRIMWALL 0 35 3 6 816 762 29 2100 2900 3000 WALLCLAD AHI 035 36 838 762 1
20. BMT 0 60 28 1800 SPANDEK HI TEN BMT 0 42 18 1200 SPANDEK HI TEN BMT 0 48 20 1400 TRIMDEK HI TEN BMT 0 42 20 1000 TRIMDEK HI TEN BMT 0 48 22 1200 CUSTOM ORB BMT 0 42 10 800 CUSTOM ORB BMT 0 48 10 1000 CUSTOM BLUE ORB BMT 0 60 8 800 The purlin spacing may be increased for radii greater than the minimum radii shown provided the spacing does not exceed that shown in Table 2 3 1 4 4 Pre curved roofs Pre curved corrugated roofing is popular for aesthetics such as a bullnosed verandah roof or for function such as a gutterless eave design CUSTOM BLUE ORB can be curved to a radius as small as 300mm We don t recommend pre curving for other profiles MINI ORB can be curved to a radius to as small as 150mm though it isn t recommended for roofing Because of the spacing of curving rolls there is usually a straight portion at the end of the sheet beyond the curve often 50 to 110mm for CUSTOM BLUE ORB and about 50mm for MINI ORB Allow for this in your design It can be trimmed off if necessary If a pre curved section of cladding is to be joined to a straight section you should order the curved and straight sheets at the same time asking for them to be matched in production End lap the sheets as described in Section 11 4 End lapping Our CUSTOM BLUE ORB brochure gives more details 2008 9 Edition DESIGN CURVED BENT AND TAPERED ROOFING 19 Fit cap over cut rib 4 5 Capped bent ribbed roofs available for pres
21. M5 5 1 1x50 Roofzips M5 5 1 1x50 OR Self drilling screws with hex washer head EPDM seal Higrip amp shank protection 12 14 x 45 M5 5 14x45 Roofzips M6 1 1x65 OR Type 17 Self drilling screws with hex washer head EPDM seal Higrip amp shank protection sortwoop 12 11 x 65 M5 5 1 1x65 HARDWOOD 2 I1 x 50 M5 5 1 1x50 Self drilling screws with hex washer head amp EPDM seal 10 12x20 M4 8 12x20 Valley OR fixed Self drilling screws with hex washer head amp EPDM seal 10 16x16 M4 8 16x16 Self drilling screws with hex washer head amp EPDM seal 10 16x16 M4 8 16x16 Roofzips M6 1 1x65 OR Type 17 Self drilling screws with hex washer head amp EPDM seal sortTwoop 10 12 x 30 M4 8 12x30 HARDWOOD 10 12 x 20 M4 8 12x20 ans Crest 3 fastenerst an Valley 3 fastenerst 2 Crest 4 fasteners gE OE N oe Valley 4 fasteners Ez N SPANDEK Crest 4 fasteners 7X Valley 4 fasteners 27 TRIMDEK TRIMWALL Valley Gai m fixed All fixing as specified for TRIMDEK WALLCLAD Valley m fixed All fixing as specified for CUSTOM ORB Roofzips are registered trademarks of ITW Buildex and are recommended for specific applications Using LYSAGHT Roofing and Walling Number of fasteners depends on wind pressure see brochure on this product KEY t Fasteners per sheet per support S Side lap 2008
22. Roofing learance essential E Figure 11 6 1 Small penetration with metal skirt and sleeve Figure 11 6 2 Small penetration with sleeve Using LYSAGHT Roofing and Walling 11 6 Flashing small roof penetrations A flanged cylindrical sleeve is a fairly simple method of flashing around small penetrations such as pipe penetrations which fit between the ribs of a roof sheet or penetrate only a single rib Three methods are described here Wherever roofing is cut you must consider providing extra support for the roofing above and below the penetration Method 1 Tapered metal skirt and sleeve This method uses parts custom fabricated from metal There is no positive seal between inside the building and the outside atmosphere Figure 11 6 1 Method 2 Sleeve This is often the simplest method Figure 11 6 2 Flexible flanged sleeves can be bought for flashing around penetrations of at least 350mm diameter They overcome the problem of capping and sealing the open ends of cut ribs A sleeve is commonly used though silicone sealant has a wider operating temperature range and is available in a wider range of colours The flange around the base of the sleeve can be contoured by hand to match the cladding profile before it is sealed and fixed to the cladding Be careful not to dam any valleys or pans so that rainwater can drain freely from the high side of the roof penetration Moisture held in such areas can cause deterioratio
23. Surfmist 37 1 43 8 1 5 6 l Ll 4 3 inside temperature 30 C Sandbank 58 1 68 4 2 3 9 4 1 6 6 7 Wilderness 91 2 106 9 3 6 14 4 2 5 10 3 Woodland Grey 101 4 118 7 4 0 15 9 2 8 11 3 Deep Ocean 108 2 126 6 4 3 16 9 3 0 12 0 Comparison of thermal performance Table 5 1 1 shows thermal performances of different insulation systems by showing the heat that may be expected through roofs of new materials Heat control methods In roofs a simple inexpensive and very effective method is to drape a Reflective foil laminate membrane of reflective foil laminate over the supports before laying the cladding The laminate can also provide a vapour barrier to minimise condensation If the membrane is allowed to drape 50 to 75mm between the supports the air space between the membrane and the roof cladding will further improve heat insulation Figure 5 1 2 Roofing Additional heat insulation is often achieved by using bulk insulation Figure 5 1 2 blankets or batts Figure 5 1 3 Reflective foil laminate is simple cheap and very The same principles apply to walls though the foil is not draped effective 5 2 Condensation When the air in a building in contact with metal cladding is warmer than the cladding water vapour moisture in the air can condense on the a inside of the cladding Roofing lt y Water vapour passes fairly freely through most building linings into the ceiling and wall spaces where it may directly contact the
24. cladding Reflective foil laminate Insulation blanket Condensation can lead to deterioration of building components and staining of ceiling and walls If insulation blankets or batts are wet or even slightly dampened by condensation its efficiency is reduced markedly The amount of condensation depends upon the amount of water vapour in the air and this varies with climatic conditions Activities within a building can add substantially to the amount of water vapour and typical domestic situations include bathing showering cooking washing and drying clothes and dishes and breathing It is essential to vent substantial amounts of water vapour to outside the building To minimise the risk of condensation on the underside of roofing a vapour barrier is often used to prevent contact of warm moist air with the Figure 5 1 3 es roofing reflective foil laminate is commonly used Typical roof insulation with foil and blanket Using LYSAGHT Roofing and Walling 2008 9 Edition 22 DESIGN INSULATION AND SKYLIGHTING To minimise the risk of condensation on the underside of the laminate the laminate must be draped between roof supports so that the cold cladding is not in contact with the laminate except at the supports 5 3 Noise reduction Rain noise To reduce rain noise on metal roofing an insulation blanket can be placed over the foil laminate described above before laying the roofing It is important that the laminate
25. get the best results by first cutting off the corner of the down pointing leg of each female rib Do this before you place the sheets on the roof e With the hinged turn up tool open position the tool on the sheet with the locating pins hard against the end of the sheet e Hold the handles together to clamp the tool onto the tray and pull them to turn up the tray 90 Figure 10 1 4 2008 9 Edition INSTALLATION ENDS OF SHEETS 45 TRIMDEK Turn down Backing tool nts 203 KLIP LOK 406 turn down SPANDEK Turn down Backing tool Turn up tools KLIP LOK MAXIMA INTEGRITY 820 Turn up amp turn down Figure 10 1 1 Turn down Backing tool Turn up tools Turn up and turn down tools KLIP LOK 700 HI STRENGTH Flush turning up KLIP LOK In normal turning up of KLIP LOK the tops of the ribs protrude past the turned up tray Consequently the turn ups cannot be positioned hard against a fascia or wall or the ends of the sheets on either side of the ridge cannot be butted together This is usually of no consequence because the turn up is completely covered by a flashing or capping However if you want the ribs not to protrude past the turn up you can make a flush turn up You need an extra 40mm in sheet length for flush turn ups 1 Cut the top of each rib before turning up the pans Figure 10 1 5 Turn up the pans as described before 2 Position the backing tool in the tray and hold it hard against the turn up with a
26. heads and sills of doors and windows Thus you first have to decide where the cladding will eventually be located at the heads of doorways and at the heads and sills of windows before you place the first sheet e Where possible select the vertical size of windows so that the flashings at both heads and sills will coincide neatly with the pitch of your profile Figure 11 7 1 e Be sure that the crests of the profile align with each other on adjacent walls either side of a corner this ensures that horizontal flashings fit properly into all valleys Corrugated i e Where valleys create a void at flashings use closed cell foam plastic infill Figure 10 3 3 INTERNAL LINING e Where wind driven rain can be expected turn back the edges of Flashing flashing to restrict water movement past the flashing Header ON Window frame Window frame Flashing Cotrugated fA walling This dimension must relate to the pitch of the sheeting e INTERNAL LINING Figure 11 7 1 Typical header and sill flashing profile running horizontally elevation Using LYSAGHT Roofing and Walling 2008 9 Edition 60 INSTALLATION FLASHINGS Profiled closed cell infill Wale e Flashing Profiled closed cell infill INTERNAL LINING INTERNAL LINING Typical external corner flashing type I profile running horizontally plan INTERNAL LINING Pr
27. length amp Self drilling for timber self drilling screw with seal or wafer or none use Hex head self drilling screw Hexagon washer EPDM p with seal and extended drill or wafer or none Self drilling for metal Metal Hex head self drilling EPDM z screw for thin battens Hexagon washer or none Always Self drilling for metal BEN Slotted hexagon with thin EPDM Stitching screws washer Needle Serrated also available orong Ripple Teks Special self sealing head Self drilling for metal woe Underdriven Correctly Overdriven driven Figure 3 6 1 It is important that you set screws correctly Using LYSAGHT Roofing and Walling 3 6 Setting of screws Fasteners with sealing washers should be tightened only until the washer is gripped firmly enough to provide a weathertight seal The fasteners should not be over tightened because this may split the sealing washer or deform the sheet either of which could lead to water penetration Take particular care when valley fixing because there is no flexibility with the sheet hard against its support Roofzips are registered trademarks of ITW Buildex 2008 9 Edition 3 7 Quantity of fasteners and clips KLIP LOK 406 KLIP LOK 700HS KLIP LOK MAXIMA and LONGLINE 305 For number of clips see equation at right For KLIP LOK 406 there are 2 fasteners per clip For KLIP LOK 700 and KLIP LOK MAXIMA there are 3 fasteners per clip For LONGLINE 305 there is 1 fastener per clip Pierce
28. max E j Sealant Sealant 25 mm max 25 mm max A RER j Figure 7 8 1 Typical joints with sealant 2008 9 Edition 30 CARE AND HANDLING Maintenance of COLORBOND prepainted steel The paint system on COLORBOND steel sheet is very durable Simple maintenance of the finish enhances its life and maintains attractiveness for longer periods Where the paint finish is naturally washed by rainwater roofs for example there is usually no additional maintenance needed However areas to be washed include soffits wall cladding under eaves garage doors and the underside of eave gutters Washing should be done at least every six months and more frequently in coastal areas where sea spray is prevalent and in areas where high levels of industrial fallout occur Avoid accumulation of salty deposits or industrial dirt Establish a regular routine for washing COLORBOND prepainted steel products Often garage doors can be washed with clean water at the same time as your car is being washed Guttering and eaves can be hosed down when windows are being cleaned Walls can be hosed down while watering the garden Where regular maintenance doesn t remove all the dirt wash the surface with a mild solution of pure soap or non abrasive non ionic kitchen detergent in warm water Use a sponge soft cloth or soft bristle nylon brush be gentle to prevent shiny spots Thoroughly rinse off the detergent with clean water Never use abra
29. on all our claddings and the results have been used in the preparation of the fixing and installation recommendations in this manual 2 9 Environmental conditions Coated steel products can be damaged by some environmental conditions including industrial agricultural marine intensive animal farming swimming pools or other aggressive conditions If any of our products are to be used in these conditions or unusually corrosive environments seek advice from our information line Page 1 Keep the product dry and clear of the ground If stacked or bundled product becomes wet for extended periods separate it wipe it with a clean cloth and stack it to dry thoroughly 2 10 Metal and timber compatibility Contact with or runoff from some materials can damage coated steel products Buildings can also be susceptible to condensation on inside sufaces The materials include certain metals treated timbers and chemicals e Don t allow any contact of coated steel products with incompatible materials e Don t allow discharge of rainwater from incompatible materials onto coated steel products Table 2 10 1 e Ensure that supporting members are compatible with the coated steel products or alternatively appropriately coated If there are doubts about the compatibility of other products being used seek advice from our information line Incompatible materials include e lead e copper e monel metal e bare steel Using
30. over roof sheeting eRe A Leg Ends of ribs sealed DA gt ZS os A P N P CE IA Rib sealed to back of gutter Steel apron flashing turned down close to rib to allow maximum drainage Figure 11 5 1 Flashing method 1 Head gutter Sleeve has clearance around protrusion Flash top of sleeve with over flashing from protrusion Ends of ribs sealed Sleeve sealed and fastened to tray Roofing sealed and Ribs closed and sealed fixed to tray Figure 11 5 2 Flashing method 2 Flat tray and sleeve Using LYSAGHT Roofing and Walling 11 5 Flashing large roof penetrations Penetrations through ribbed cladding block the valleys or pans and thus affect the free flow of rainwater down a roof All flashings have to weatherproof the cladding but on the uphill side of large penetrations they also have to channel rainwater sideways into valleys that run unobstructed to the eaves Four methods are described here In all methods the ends of cut ribs may be closed off with caps on the outside of the rib or with plugs inside the ribs Plugs must be used on side laps to allow the anti capillary cavity to drain Note For masonry construction Building Code Australia BCA requires the use of Damp Proof Course DPC to ensure weatherproofing For acceptable methods see BCA section on weatherproofing masonry Support framing Wherever one or more of the sheet ribs are cut you must provide framing to support the
31. paint compounds and these should be avoided Occupational health and safety laws enforce safe working conditions in most locations Laws in every state require you to have fall protection which includes safety mesh personal harnesses and perimeter guardrails We recommend that you acquaint yourself with all local codes of safe practice and you adhere strictly to all laws that apply to your site 7 2 Care and storage before installation Rain or condensation is easily drawn between the surfaces of stacked sheets by capillary action or they can be driven in by wind This trapped moisture cannot evaporate easily so it can cause deterioration of the coating which may lead to reduced life expectancy or poor appearance If materials are not required for immediate use stack them neatly and clear of the ground If left in the open protect them with waterproof covers If stacked or bundled product becomes wet separate it without delay wipe it with a clean cloth and stack it to dry thoroughly 7 3 Handling cladding on site On large building projects you can reduce handling time by lifting bundles with a crane direct from the delivery truck onto the roof frame Use a spreader bar for long sheets For small to medium size projects without mechanical handling facilities you can unload sheets by hand and pass them up to the roof one at a time For personal safety and to protect the surface finish wear clean dry gloves Don t slide sheets
32. plan showing dimensions in plan view pitch of roof layout of ridges and valleys Roof drainage solution for eaves gutters 2008 9 Edition 4 Check that the effective roof lengths don t exceed the capacity of the roofing profile Section 2 4 5 Calculate the catchment area of the roof from the plan To allow for the slope of the roof increase the plan area by 1 for every degree of pitch up to 40 For pitches over 40 refer to AS 3500 3 2003 6 Get the effective cross sectional area of the gutter you intend to use from Table 6 2 2 7 Using the cross sectional area of the gutter on the graph in Figure 6 2 2 determine the catchment area per downpipe 8 Calculate as a first test the minimum number of downpipes required for the selected gutter using the equation Number of _ Total catchment area of the roof Catchment area determined in 7 downpipes min Round the number of downpipes up to the next whole number 9 On the plan select locations for the downpipes and the high points in the gutters Where practical the catchments for each downpipe should be about equal in area and a high point should be located at the bottom of any valleys Figure 6 2 3 Calculate the area of each catchment for each downpipe 10 Returning to the graph in Figure 6 2 2 with the area of your eaves gutter check that the catchment area for each downpipe calculated in Step 9 is equal to or less than the catchme
33. reduced by 12 5 Width reduced by 25 Width reduced by 50 Maximum reduction Figure abt eee pee PEN eee Tapered LONGLINE 305 Right hand Left hand Using LYSAGHT Roofing and Walling 2008 9 Edition 20 DESIGN INSULATION AND SKYLIGHTING 5 Insulation amp skylights Solar radiation system A light shiny surface has Be o high reflection amp low emittance KA RA A dark dull surface has GAIO low reflection amp high emittance azh 5 DA Figure 5 1 1 Heat transmitted into a building Using LYSAGHT Roofing and Walling You often consider insulating a building to reduce e heating from the sun in summer e loss of heat from inside in winter e condensation on the inside of the roofing and walling and e noise from rain thermal expansion and contraction and other sources Usually when one of these four is treated there is also a beneficial effect on the others You need to compare the initial cost of installing insulation with the savings in costs of heating and cooling There are also gains for the environment when you save energy AS 2627 1 1993 Thermal insulation of dwellings thoroughly treats the subject including comprehensive tables of recommended thermal resistance R values for over 1000 towns throughout Australia 5 1 Heat control In summer buildings get hot from the sun and we want to cool the inside in winter we often heat the inside and want to avoid losing that heat Factor
34. rib of the first sheet Figure 9 1 2 The clip fixes the edge of the first sheet but you must fix two clips at the start and thus reach out further for the first and all subsequent sheets The following description is for Method 1 ALL KLIP LOK PROFILES Fix the first clip on the purlin nearest the gutter with the clip pointing correctly in the direction of laying Figures 9 1 1 and 9 1 2 Be sure the clip is 90 degrees to the edge of the sheet Using a string line or the first sheet as a straight edge to align the clips as you fix a clip to each purlin working towards the high end of the roof 2008 9 Edition INSTALLATION CONCEALED FIXING 37 Overlapping rib Place the first sheet 1 Locate the first sheet over the fixed clips Figure 9 1 3 2 Using a measurement from the gutter end of the sheet to the fascia or purlin position the sheet so that it overhangs the desired amount I into the gutter usually about 50mm It is important that you keep the gutter end of all sheets in a straight line t Underlapping rib KLIP LOK 700HS 3 KLIP LOK 406 If a spur on the edge of a KLIP LOK 406 sheet fouls a clip flatten the spur with a rubber mallet to allow the clip to sit down over the rib Figure 9 1 4 Overlapping rib ALL KLIP LOK PROFILES Fully engage the sheet with the clips using vertical foot pressure on all the ribs over each clip KLIP LOK 406 KLIP LOK 406 shown Figure 9 1 3 Placing th
35. stops after sheet installation Bend the flat of the end stops 90 Push an end stop into the space under each rib until the flat is wedged firmly between the underside of the cladding and support Figure 10 3 2 Infill strips Closed cell foam plastic infill strips are available to match the top or bottom profile of our roof claddings At the lower end of cladding the strip is sandwiched under the roof cladding Similarly at the upper end the strip is sandwiched between topside of the roofing and the underside of the flashing or capping Figure 10 3 3 Don t use infill strips that can absorb water because retained moisture can lead to deterioration of the sheet coating Avoid using infill strips made from or treated with flammable materials particularly in areas prone to bushfire Section 11 8 Where roof pitches are below 1 in 5 10 you should incorporate infill strips to maximise waterproofness Using LYSAGHT Roofing and Walling INSTALLATION ENDS OF SHEETS 47 A Yes 7N pprox CVN A lt pprox mm 7 5mm Cut back corner Figure 10 2 3 Cut SPANDEK on low slopes Figure 10 3 1 Fitting rib end stops during installation of sheets Figure 10 3 2 Fitting rib end stops after installation of sheets SS LEE Figure 10 3 3 Profiled closed cell infill at eaves 2008 9 Edition 48 INSTALLATION ENDS OF SHEETS See Table 10 4 1 spacing of fasteners See text for Pierce fi d th
36. to 6 Walls The design of walling from a steel perspective is fairly straightforward Once you have made the aesthetic decision of which profile to use the main considerations are the support spacings Section 2 3 fixing details Chapter 3 and the details of flashing Chapter 11 Roofs There are many factors in designing roofs including e the shape is the roof to be flat or pitched or curved e the supporting structure and support spacing e the wind forces that the roof must sustain e the pitch which affects the looks the profile s ability to efficiently carry rain to the gutters and fixing details e thermal expansion of long sheets Chapter 10 e the attributes of other materials used in the roof design This book doesn t attempt to cover the structural design details of supports or aesthetics there are many other texts and Australian Standards that cover them This chapter gives tables of recommended support spacings and the maximum roof length for pitch and rainfall intensity for steel roofing products The appropriate design will depend on your particular needs and circumstances You should get advice from the relevant specialists where required Using LYSAGHT Roofing and Walling 2 2 Materials and finishes Our most widely used cladding profiles are listed in Tables 2 3 1 and 2 3 2 They are available in COLORBOND prepainted steel complying with AS NZS 2728 1997 or in unpainted ZINCALUME
37. to eave SPANDEK CUSTOM ORB and CUSTOM BLUE ORB can be spring curved for an arched roof Table 4 2 1 shows the acceptable radii The top face of all purlins must accurately follow and be tangential to the radius of the arch The radius of curvature can be calculated from the formula in Figure 4 2 1 Table 4 2 1 Recommended radii for convex spring curving Minimum Purlin spacing at Maximum radius minimum radius radius m mm m SPANDEK 0 42 BMT 20 1200 60 SPANDEK 0 48 BMT 20 1400 60 CUSTOM ORB 0 42 BMT 12 800 35 CUSTOM ORB 0 48 BMT 10 1000 35 CUSTOM BLUE ORB 0 6 BMT 9 900 35 LONGLINE 305 0 7 BMT 26 1600 180 Maximum radius is to provide sufficient drainage near crest of arch Figures shown are for untapered product Minimum radius for tapered LONGLINE 305 depends on the amount of taper At the crest of an arch the roof is flat which is obviously below the specified minimum roof pitch Therefore side laps should be sealed over the crest of the arch until there is sufficient pitch to give adequate drainage see Table 2 3 1 The length of seal is shown in Figure 4 2 2 Over the supports very slight crease marks may appear in the pans or valleys when subjected to foot traffic They don t affect strength and will usually not be seen from the ground If end laps are necessary they should not be located at or near the crest of the arch and each sheet length must span at least three purlin spacings
38. to suit gutters gutter steeper than 1 500 Effective Round Rectangular Slotted cross section diameter or square yes no mm mm mm EMLINE yes 6723 100 100 x 75 High N EMLINE no 9540 125 100 x 75 Downpipe point 2 O a FITFAST yes 6723 90 100 x 75 FITFAST yes 7209 90 100 x 75 FLAT BACK yes 5220 90 100 x 75 FLAT BACK no 6447 90 100 x 75 High HALF ROUND yes 4775 90 100 x 75 point HALF ROUND no 6995 90 00 x 75 OGEE no 5242 00 x 50 C O A m QUAD 115 Hi front yes 5225 90 75x75 High Downpipe4 amp z QUAD 115 Hi front no 5809 90 00 x 50 point lt 2 wet Hi front fluted Qld yes 5285 90 75 x 75 fa a Hi front fluted Qld no 5809 90 00 x 50 Figure 6 2 3 Low front yes 3600 90 75 x 50 Locating high points and downpipes kowaront 10o alee 20 ls QUAD 125 no 6370 90 00 x 50 QUAD 150 no 8910 100 00 x 75 QUAD 175 no 14672 100 100 x 75 SHEERLINE yes 7600 100 00 x 75 SHEERLINE no 8370 100 00 x 75 TRIMLINE yes 6244 100 00 x75 TRIMLINE no 7800 100 00 x 75 Values calculated in accordance with AS NZS 2179 1 1994 Using LYSAGHT Roofing and Walling 2008 9 Edition PART B INSTALLATION 7 General care safety and handling 7 1 Safety It is commonsense to work safely protecting yourself and workmates from accidents on the site Safety includes the practices you use as well as personal protection of eyes and skin from sunburn and hearing from noise Some sunscreens contain titanatium oxides These have been shown to break down some
39. tray is turned up Figure 11 5 3 Flashing method 3 Tray gutter for steeper roofs Method 4 Penetration close to ridge capping Roofing Width W lt gt Roofing a T Framing to eer support tray Supports for cut ends of roofing SECTION X X The base of the tray over width W slopes slightly towards the protrusion The width W varies with this slope the roof pitch and the rib height Thus a Rib height sin roof pitch slope of tray For example if the tray slopes in 50 I and the roof pitch is in 12 5 RIB DEPTH WIDTH W minimum If a roof penetration is close to a ridge capping or flashing above the penetration you can fit a simple flat tray on top of the roofing so that it extends from under the capping down to a sleeve around the penetration Coated steel tray with 2 sides turned down over ribs Tray must be supported by roofing underneath Turn down amp notch Turn up on low pitch roofs Figure 11 5 4 Penetrations close to ridge capping Using LYSAGHT Roofing and Walling 25 mm 360 mm 29 mm 420 mm 41 mm 590 mm Turn up fits funder capping ca Tapered skirt amp sleeve see also Figure 11 6 1 e Extra support for roofing 2008 9 Edition 58 INSTALLATION FLASHINGS Penetration Penetration between ribs through ribs Draw band 2r c Tapered skirt 5 Flanged i Sealant 2 A ice a E N
40. 10 5 2 shows the maximum distance between the top and bottom rows of fasteners on a sheet If the total length of two sheets pierce fixed through the lap or a single sheet exceeds this distance then an expansion joint is needed There should be no more than one pierce fixed end lap between expansion joints An expansion joint involves overlapping the ends of the upper sheets over the ends of the lower sheets but with a clearance between them about 15mm A typical overlap is 250mm this overlap is not the same as the overhang in Table 2 3 1 which does not apply to expansion joints The clearance is usually created by having all the purlins for the roofing on the high side of the joint higher than the roofing on the low side of the joint An extra purlin is needed at the joint A baffle flashing provides weatherproofing See Figure 10 5 1 Where there is a risk of high winds or the ribs are big you may need extra flashing including closed cell foam plastic infill strips 2008 9 Edition 10 6 Roof overhang with edge stiffener For the stiffened overhangs listed in Table 2 3 1 you need to stiffen the gutter ends of the roofing Our SHEERLINE gutter fixed through the return lip to the underside of roofing at 200mm centres will provide the required stiffening Alternatively you can use a 50 x 50 x 1 2mm steel angle fixed at 200mm centres to the underside of the roofing about 50mm from the end Using LYSAGHT Roofing and Walling
41. 6 2100 2400 2400 WEATHERBOARD 0 42 4 1 272 260 12 1000 1000 1 Masses are for unpainted ZINCALUME steel With 4 fasteners per sheet per support 7 With 6 fasteners per sheet per support if end lap End SPa ansion joint 7 S ES Is Is Spacing definitions Spacing definitions ES End span ES End span 2 IS Internal span IS Internal span g O Overhang O Overhang Using LYSAGHT Roofing and Walling 2008 9 Edition 8 DESIGN DESIGN PRELIMINARIES Table 2 4 1 Maximum roof lengths for drainage measured from ridge to gutter m Penetrations alter the flow of water on a roof Thus for design you need to use an effective roof length Figure 2 4 1 Peak Roof slope Peak rainfall rainfall intensity 1 in 50 1 in 30 1 in 20 1in12 1in7 5 1in6 intensity mm hr 1 2 3 5 7 5 10 mm hr 100 29 34 38 100 150 20 23 25 150 custo ong 22 EEE CUSTOM BLUE ORB 300 10 11 13 300 400 7 8 10 400 500 6 7 8 500 100 410 480 598 713 820 100 150 273 320 399 476 547 150 200 205 240 299 357 410 200 INTEGRITY 820 250 164 192 239 285 328 250 SPANRIB 300 137 160 199 238 273 300 400 102 120 150 178 205 400 500 82 96 120 143 164 500 Ridge 100 375 467 548 682 813 934 100 AA 150 250 311 365 454 542 623 150 amp 200 188 234 274 341 406 467 200 KLIP LOK 406 250 150 187 219 273 325 374 250 i 300 125 156 183 227 271 311 300 400 94 117 137 170 203 234 400 ys 500 75 93 110 136 163 1
42. 87 500 100 344 428 502 624 745 856 100 amp 150 229 285 334 416 496 571 150 N 200 172 214 251 312 372 428 200 4 Rene 250 137 171 201 250 298 342 250 300 115 143 167 208 248 285 300 400 86 107 125 156 186 214 400 500 69 86 100 125 149 171 500 Fi 100 238 296 347 432 516 593 100 150 159 198 232 288 344 395 150 200 119 148 174 216 258 296 200 yy KURTOK 350 95 119 139 173 206 237 20 300 79 99 116 144 172 198 300 Valley Effective length 400 60 74 87 108 129 148 400 25m Base length 500 48 59 69 86 103 119 500 2 Base length A B 225 l 10 40m 100 219 273 320 398 475 546 100 150 146 182 213 265 317 364 150 6 Base length C D E 200 110 136 160 199 237 273 200 25 3 15 4 10 55m EONGUINIE 302 250 88 109 128 159 190 218 250 Worst case used for design P 300 73 91 107 133 158 182 300 400 55 68 80 100 119 136 400 Figure 2 4 1 500 44 55 64 80 95 109 500 Example of calculating effective roof lengths where penetrations alter the 100 111 133 154 173 100 flow of water on a roof 150 74 89 103 115 150 200 55 67 77 86 200 SPANDEK 250 44 53 62 69 250 300 37 44 51 58 300 400 28 33 39 43 400 500 22 27 31 35 500 100 220 257 320 382 439 100 150 146 172 214 255 293 150 200 110 129 160 191 220 200 TRIMDEK 250 88 103 128 153 176 250 300 73 86 107 127 146 300 400 55 64 80 96 110 400 500 44 51 64 76 88 500 Some lengths in this table may exceed the maximum allowable transport length e Data are based on work of CSIRO and BlueSco
43. 9 Edition 16 DESIGN CURVED BENT AND TAPERED ROOFING 4 Curved bent amp tapered cladding Spring curec ridge pof Sheets straight except for _ a curve near the ridge Spring ached roof Sheets curved in a radius ait from eave to eave Spring cuwed concave roof Sheets curved concavely in a radius Pre curved roofing Sheets curved by machine before installation Capped bent ribed roofs for example KLIP LOK AT Figure 4 1 Typical curved and bent applications Spacing from Table 4 1 1 NS Normal ae ay given in Table 2 3 1 Figure 4 1 1 Spring curved ridge roof Using LYSAGHT Roofing and Walling An excellent method of cladding low slope gable roofs is to run continuous lengths of roofing from eave to eave across the full width of the roof This gives a particularly neat and attractive roof It is also possible to spring curve sheets into a concave shape With the exception of KLIP LOK the ridge capping is eliminated in these roofs thus avoiding any possibility of leakage along the ridge KLIP LOK can be used similarly but the ribs are cut at the ridge and a metal cap is fitted over the cut 4 1 Spring curved ridge roof Sheets in a spring curved ridge roof remain straight except for a curve near the ridge The pans of KLIP LOK INTEGRITY LONGLINE 305 and TRIMDEK tend to oilcan minor waviness in the pan when spring curved Apart from not looking good an oilcanned pan may retain water w
44. ARIES 5 Upper surface materials Lower ZINCALUME COLORBOND i surface A Glazed tiles Unglazed materials Savani ed KRN METALIC SANCE g Aluminium Copper Zinc Monel Lead glass amp i ties j amp ULTRA STEEL p asuc concrete Galvanised steel Y N N N N Y N Y N Y ZINCALUME COLORBOND XRW Y Y ye Y N Y N N Y METALIC amp ULTRA Stainless steel Y Y Y Y ve ys ye ys Y Y Aluminium Y Y Y Y N Y N y Y Y Copper wr yo Ye Y7 Y Yo Y Y Y Y Zinc Y N N N N Y N y N Y Monel ya Y yx Y3 Y yS Y Y Y Y Lead y yr y Y y ye Y Y Y Y Y Acceptable CUSTOM BLUE ORB lends itself to the smooth curves of large arched roofs This roof has both convex and concave curves Using LYSAGHT Roofing and Walling Y Drainage acceptable direct metal contact not acceptable N Not acceptable 2008 9 Edition 6 DESIGN DESIGN PRELIMINARIES Table 2 3 1 Specifications of roofing amp walling profiles Maximum recommended spacing of supports ROOFS WALLS Overhang BMT Mass esl Cover Rib Roof pitch single End Internal Unstiff Stiff singe End Internal OVE approx width depth minimum g ened ened g hang mm kg m mm mm mm degrees mm mm mm mm mm mm mm mm mm CUSTOM ORB 4 ALNAN 0 42 43 838 762 16 5 1 in 12 700 900 1200 200 300 1800 2500 2700 200 0 48 49 838 762 16 5 1 in 12 800 1300 1700 250 350 1800 2700 2700 250 CUSTOM BLUE ORB 4 TTT 0 60 6 1 838 762 17 5 1 in 12 1600 1600 1800 200 300 2400 3000 3300
45. EK TRIMDEK INTEGRITY 820 Crest fixing may also be used for these products when they are used as walling Using LYSAGHT Roofing and Walling 2008 9 Edition 34 INSTALLATION PIERCE FIXING Don t fix this valley gas CUSTOM ORB to steel support RE AEE aa TRIMDEK HI TEN to steel support Figure 8 4 1 Typical valley fixing for walls only CUSTOM ORB to steel support TRIMDEK HI TEN to timber support Figure 8 4 2 Alternative valley fixing with crest fixing at side laps for walls only Using LYSAGHT Roofing and Walling 8 4 Pierce fixing on valleys for walling only Wall fasteners may be placed on the crests but they are usually placed in the valley of wall cladding because e they are less conspicuous and don t break the aesthetic lines of the steel cladding e there is no risk of the profile being deformed because the fastener is placed through the cladding where it rests flat against its support Figure 8 4 1 and e water penetration is not a problem However when valley fixed the cladding needs a side lap fastener in all laps at each support You will find it more economical in labour time and cost of fasteners to use a crest fastener at each side lap in place of the lap fastener and adjacent valley fastener Figure 8 4 2 8 5 Pierce fixing on side laps Where roofing is installed according to the support spacings shown in Tables 2 3 1 and 2 3 2 side lap fasteners are generally not require
46. Figure 9 3 2 2008 9 Edition Fixing EASYCLAD panels Locate the first panel either in its trim channel or under the clips depending on the start method you used Fix the underlapping side of the panel to each support through the flat edge with the recommended fastener Chapter 3 The indentations along the edge help you locate the fasteners Figure 9 3 3 Fit subsequent panels by hooking the lip of your next sheet under the folded back edge of the previous panel before fixing in the same way as before Figure 9 3 4 Usually the last EASYCLAD panel will have to be cut in width to suit the building The panel may require exposed pierce fixing If you use a trim channel at the end of the EASYCLAD walling position it and pierce fix with the last panel Figure 9 3 5 Using LYSAGHT Roofing and Walling INSTALLATION CONCEALED FIXING 41 i OI a Indentations to y locate screws Figure 9 3 3 Indents on edge of sheet help to locate screws r i pa CY a Figure 9 3 4 Starting for subsequent sheets Support Panel Pierce fixing y fastening in valley Last panel cut to width j Trim PR Figure 9 3 5 Using trim channel to finish Support U Weather side Inside Figure 9 3 6 Start external walls from the bottom 2008 9 Edition 42 INSTALLATION CONCEALED FIXING Cut clip across big hole and discard section shown with dashed line y oO gt l AQA IOa et ele eo
47. LORBOND finishes 11 2 Longitudinal flashings Longitudinal flashings run parallel to the pans or valleys and are made to suit the cladding profile Figure 11 2 1 They should have an edge turned down to dip into the pan or valley Flashing Cover The minimum recommended cover of longitudinal flashings over cladding Pierce fixed roof sheet 150mm min Concealed fixed roof sheet Into full pan 2 3 pan covered as taken from HB39 1997 should be as follows 2008 9 Edition INSTALLATION FLASHINGS 53 Every 4th rib 11 3 Transverse flashings Transverse flashings run across the pans or valleys Figure 11 3 1 They usually have a stiffening lip along the lower edge which is turned down to dip into the pan or valley To maximise weather proofing the bent lip is fashioned to fit the profile Ridge capping ree The turn down for transverse flashings for CUSTOM ORB and CUSTOM BLUE ORB can be fashioned to fit the profile by either notching or scribing to match the corrugations or lightly dressed into the valleys The type of fashioning if any depends upon profile shape and the type of en i gt material used to flash Fashioning is preferred for low slope roofs Fascia capping The turn down for transverse flashings for wide panned cladding is always notched or scribed to fit over the ribs e Soret D gt Flashing Cover LYSAGHT produces a range of standard flashings hip barge apron
48. LYSAGHT Roofing and Walling e stainless steel except with COLORBOND stainless cladding e carbon in pencils and some rubbers e green or some chemically treated timber like CCA or tanalith treatments e materials subject to cycles of dryness and wetness or which have excessive moisture content such as improperly seasoned timber e wet and dry concrete e soils e vegetable matter e any material which will inhibit normal exposure to the atmosphere Paint and COLORBOND finishes COLORBOND finishes can be damaged by some types of paint There can also be problems of colour matching due to different weathering characteristics Cladding with severely damaged COLORBOND paint are best replaced rather than patched up We recommend that you don t touch up minor scratches with paint You may overpaint whole roofs and paint accessories to match specific colours The particular paints and methods recommended are discussed in Technical Bulletin TB 2 published by BlueScope Steel 2 11 Transportation Because our roofing and walling is manufactured by continuous processes sheet lengths can be supplied up to the limits of transport regulations which vary from state to state KL 700HS is available in extra long lengths via an on site mobile rollformer This service is available nationally subject to enquiry 2008 9 Edition Table 2 10 1 Acceptability of drainage from one surface onto another DESIGN DESIGN PRELIMIN
49. NCALUME AZI50 AS 3566 Class 3 For severe exposure conditions COLORBOND 200 to 400 metres from marine environments COLORBOND ULTRA 100 to 200 metres from marine environments AS 3566 Class 4 Where the colour match of fasteners is an overriding consideration powder coated painted fasteners may be used For very severe exposure conditions COLORBOND STAINLESS Stainless steel Stainless steel fasteners are recommended for use only with COLORBOND STAINLESS Table 3 1 1 Materials for screws 3 2 Materials for nails Nails should be of galvanised steel They are only used to fix the clips of some concealed fixed cladding to timber supports 3 3 Materials for blind rivets For COLORBOND STAINLESS use stainless steel blind rivets with stainless steel mandrels for GALVABOND ZINCALUME and COLORBOND steels use aluminium blind rivets Blind rivets are used for fixing flashings accessories and side laps 3 4 Materials for sealing washers Sealing washers used under the heads of screws on COLORBOND finishes must be made from materials that don t have significant levels of conductive carbon black particularly in marine environments Use EPDM washers not neoprene Using LYSAGHT Roofing and Walling 2008 9 Edition 10 DESIGN FASTENERS Top threaded section Extrudes sheeting towards the seal to maximise waterproofness Grips the sheeting for a secure connection Stops sheet
50. ON PIERCE FIXING 33 8 2 Side lapping amp positioning pierce fixed sheets To prevent moisture being drawn into laps by capillary action the edges of sheets are slightly modified CUSTOM ORB and CUSTOM BLUE ORB CUSTOM ORB to steel support have the edges of the sheet over curved other products like SPANDEK TRIMDEK INTEGRITY 820 all have flutes formed into the underlapping rib It is important that sheets be lapped correctly Figure 8 2 1 After fixing the first sheet place the next and subsequent sheet with its side lap snugly over the previous sheet Figure 8 2 1 Secure the sheet i TRIMDEK HI TEN to timber support firmly in place until each end of the sheet has been fixed Typical also of INTEGRITY see detail You can do this easily by e align the bottom edge accurately by a measurement from the end ANA A SPANDEK HI TEN to steel support of the sheet to the fascia or purlin at the gutter e clamp the lap with a pair of vice grips Figure 8 2 2 Non conductive EPDM washer e atthe top of the sheet nestle the side lap snugly check i Seali alignment and fix the sheet with a fastener irai Adhesive layer on underside of sealing plate bonds washer to roof sheeting Figure 8 2 1 Crest fixing 8 3 Pierce fixing on crests Crest fixing is recommended for roofs made from Figure 8 2 2 Clamp one end of the sheet whilst fixing the other CUSTOM ORB end CUSTOM BLUE ORB SPAND
51. ads and the Supplement AS 1397 2001 Steel sheet and strip Hot dipped zinc coated or aluminium zinc coated AS 1562 1 1992 Design and installation of sheet roof and wall cladding Metal AS NZS 2179 1 1994 Specification for rainwater goods accessories and fasteners Metal shape or sheet rainwater goods and metal accessories and fasteners AS 2334 1980 Steel nails Metric series AS 2627 1 1993 Thermal insulation of dwellings AS NZS 2728 1997 Prefinished prepainted sheet metal products for interior exterior building applications Performance requirements AS 3500 3 1990 National plumbing and drainage code Part 3 Stormwater drainage AS 3566 1 2002 Self drilling screws for the building and construction industries General requirements and mechanical properties AS 3959 1999 Construction of buildings in bushfire prone areas AS 4040 1 1992 Methods of testing sheet roof and wall cladding Resistance to concentrated loads AS 4040 2 1992 Resistance to wind pressures for non cyclone regions AS 4055 1992 Wind loads for housing AS NZS 4256 1994 Glass fibre reinforced polyester SAA HB39 1997 Installation code for metal roof and wall cladding SAA HB106 1998 Guidelines for the design of structures in snow areas Using LYSAGHT Roofing and Walling BlueScope Lysaght Amongst the publications of BlueScope Lysaght the following are particularly appropriate Technical bulletins General TB 1 St
52. allation condensation 21 crest fixing 33 curving See roof curved cutting cladding 27 cyclonic anchoring footings 3 conditions 1 D Dektite flashings 58 design 2 roof drainage 24 roofs 2 walls 2 dissimilar metals See compatibility of materials downpipe size See roof drainage downpipe size drainage of roofs See roof drainage design Using LYSAGHT Roofing and Walling E effective roof lengths for drainage 8 end lapping 48 expansion 50 fixing methods 48 low pitches 49 order of laying sheets 49 spacing of supports 49 ends of sheets 44 blocking rib cavities 47 end lapping 48 overhang stiffened 51 turn downs 46 turn ups 44 environmental conditions 4 expansion 50 expansion joints 50 F fasteners 9 features table 10 for accessories 11 for CUSTOM BLUE ORB 12 for CUSTOM ORB 12 for EASYCLAD 12 for insulation 11 for INTEGRITY 820 13 for KLIP LOK 13 for LONGLINE 13 for MINI ORB 13 for MULTICLAD 14 for MULTILINE 900 14 for PANELRIB 14 for side laps 11 for SPANDEK HI TEN 15 for thicker steels 11 for transverse flashings 54 for TRIMDEK HI TEN 15 for TRIMWALL 15 for WALLCLAD 15 identification 10 materials 9 quantity required 11 rivets sealing 29 screws setting tightness 10 sealing washers 9 washers sealing 9 finishes 2 flashings 52 INDEX 63 at change of roof pitch 55 at copper penetrations 58 at large penetrations 56 at small penetrations 58 sleeve 58 longitudinal 52 materials 52 notchin
53. anual and Using Lysaght Roofing and Walling Using LYSAGHT Roofing and Walling GENERAL NOTES TO READ BEFORE YOU USE THIS GUIDE This Guide has been prepared for a range of roofing and walling applications including water drainage systems using products manufactured or supplied by BlueScope Lysaght The information in this booklet is suitable for use only in areas where a tropical cyclone is unlikely to occur as defined in SAA Loading Code AS NZS 1170 2 2002 Part 2 Wind Actions or if used outside Australia to the equivalent standard Information on cyclonic performance may be found in our Cyclonic Area Design manual which is available on line at www lysaght com All erection and connection details to be made in accordance with the relevant standard connection details drawing contained in this Guide We recommend you get professional advice to ensure your particular needs are adequately met a Before you commence construction b you should check with your local government authority to see if any form of prior permission or approval is required c if you want to build or construct any attached structure you should seek advice from a suitably qualified engineer to verify the capacity of your existing structure to withstand any additional load arising from the attached structure You should also check with your local government authority to determine any specific requirements for the attachment to existing structures
54. ate an electric cell when wet and thus cause deterioration of the finish You can also use a string line with chalk dust or a fine felt tipped marker Cutting Where possible you should minimise site work by using sheets cut to length in the factory For cutting thin metal on site we recommend that you use a power saw with a metal cutting blade because it produces fewer damaging hot metal particles and leaves less resultant burr than does a carborundum disc Cut materials over the ground and not over other materials where hot particles can fall and cause damage to finishes especially COLORBOND prepainted finishes It is best to have the exterior colour finish of a COLORBOND prepainted sheet facing down however you must then protect the paint finish from scratching by your work supports If you have to cut materials near sheets already installed mask them or direct the stream of hot particles away 2008 9 Edition 28 CARE AND HANDLING Reciprocating nibblers are also widely used in the roofing trade and they produce an excellent cut The resulting small sharp scraps can rust and damage finishes and they can cause personal injury Take special care to collect these scraps Making holes Holes are often made by drilling or cutting by hole saw or jig saw Mask the area around the hole to protect paint from damage by swarf 7 6 Clean up Swarf metal scraps and or abrasive particles resulting from cutting and drilli
55. ater checks Place the last sheet KLIP LOK 700 If the final space is less than the full width of a sheet you can cut a sheet along its length and shorten the clips as appropriate Using LYSAGHT Roofing and Walling 2008 9 Edition KLIP LOK 406 amp 700 If the final space is more than half the width of a sheet you can cut a sheet along its length leaving the centre rib complete Figure 9 1 9 Place the cut sheet onto a row of clips as for a full sheet If the final space is less than half the width of a sheet fix the edge of the sheet at each purlin with a clip that has been cut in half Figure 9 1 10 Cover the gap with the capping or flashing 9 2 Installing KLIP LOK walls The installation procedure for walls is similar to that described for roofs Section 9 1 To engage clips use a rubber mallet instead of foot pressure To prevent KLIP LOK from sliding downward in the fixing clips you should pierce fix through each sheet under the flashing or capping along the top of the sheets Using LYSAGHT Roofing and Walling INSTALLATION CONCEALED FIXING 39 Sheet cut longitudinally leaving full centre rib intact Figure 9 1 9 KLIP LOK 406 Placing last sheet where half a sheet will fit Figure 9 1 10 KLIP LOK 406 Placing last sheet where half a sheet won t fit 2008 9 Edition 40 INSTALLATION CONCEALED FIXING Support r Trim channel panel Recommended fastening F
56. be inspected prior to approval and completion by a suitably qualified trade or professional person A thorough design includes e The roofing material and its profile e The pitch of the roof and any penetrations that reduce the capacity of the profile to carry rain efficiently to the gutters e The catchment area of the roof including gutters Adjacent roofs and walls can affect the catchment but are not considered in this book e The gutters their location at eaves or elsewhere Figure 6 1 1 cross sectional area and gradient e The downpipes their cross sectional area quantity and location relative to the gradient e Disposal of water from the downpipes e Overflow precautions 6 2 Design of drainage eaves gutter system This section outlines a procedure for designing the drainage of a roof using an eaves gutter system It is assumed that the gutters will have a gradient steeper than 1 500 Box gutter systems can be more complex and are thoroughly treated in AS NZS 3500 3 2 1998 1 Decide on the average recurrence interval ARI Where significant inconvenience or injury to people or damage to property including contents of a building is unlikely typical of an eaves gutter system a minimum ARI can be 20 years If these conditions are likely typical of box gutters 100 years is recommended 2 Determine rainfall intensity for the site from Table 6 2 1 More data are in AS NZS 3500 3 2 1998 3 Sketch a roof
57. ber with hex washer head amp EPDM seal sortwoop 10 1230 M4 8 1 1x30 HARDWoob 0 12x20 M4 8 1 1x20 Crest 3 fastenerst NLA TN T Valley 3 fasteners 7 w Number of fasteners depends on wind pressure see brochure on this product Do not fix screws less than 25mm from the end of sheet Crest 5 fasteners _ 7PX S Valley 5 fasteners WR nen ee EASYCLAD Fixing to steel Fixing to steel Ej up to 0 75 mm BMT gt 0 75 to 3 mm BMT Fixing to timber M5 5 I 1x25 Roofzips Hex head self drillin Hex head self drilling screw Hex head self drilling ith seal 8 for timber with hex washer screws with seal screws with sea head amp EPDM seal Concealed dh her Head and hex washer head fixed BARE E 10 16x16 M4 8 16x16 sortwoop 10 12x30 M4 8 1 1x30 10 12x20 M4 8 12x20 Harpwoon 10 12x20 M4 8 1 1x20 i EASYCLAD 4P fastener SEs Z Do not fix screws less than 25mm pennis from the end of sheet EASYCLAD 2P fastener BeA fz Roofzips are registered trademarks of ITW Buildex and are recommended for specific applications Using LYSAGHT Roofing and Walling KEY t Fasteners per sheet per support S Side lap 2008 9 Edition Table 3 8 1 continued Guide to fasteners without insulation INTEGRITY 820 Fixing to steel up to 0 75 mm BMT Fixing to steel gt 0 75 to 3 mm BMT Hex head self drilling screws with EPDM seal hex washer head shank protection and Int
58. cally fixed for strength Fasteners in joints should generally be no further apart than 50mm The sealant does not require significant adhesive strength in itself but it must bond positively to all the surfaces it is to seal To ensure complete sealant cure the width of sealant in a lap should not exceed 25mm when compressed Figure 7 8 1 2008 9 Edition Applying sealant Always apply the bead of sealant in a continuous line along the centreline of the fastener holes This ensures that when compressed the sealant positively seals the fastener Be careful not to entrap air when applying sealant Especially don t place a ring of sealant around fastener holes because entrapped air compresses during tightening of fasteners and may blow a channel through the sealant which could prevent the fastener from being sealed Fasteners Use solid or sealed fasteners otherwise you have to apply sealant to the hollow centre of open blind rivets To preserve the life of your cladding is very important that fastener materials are compatible with the cladding Section 2 10 Procedure The preferred procedure for lap fabrication is 1 Assemble clamp and drill 2 Separate components and remove drilling debris 3 Clean joint surfaces as recommended above 4 Apply bead s of sealant 5 Relocate components and fix 6 Externally seal each fastener if hollow blind rivets are used To prevent premature curing which causes poor bond
59. ccomplished with ease using LYSAGHT building products mg Tea i ap e pe EEGEN Using LYSAGHT Roofing and Walling 2008 9 Edition 1 Introduction Scope This book is a guide to the installation of steel roofing and walling manufactured by BlueScope Lysaght We intend that it be used by all trades and professions involved with specifying and applying the wide range of our products We refer only to genuine steel roofing and walling manufactured by us and marketed under our brand names Our recommendations should only be used for our products because they are based on comprehensive testing of our profiles base metal thicknesses BMT and material finishes Specific product information We also have specific publications for all of our products and you should use them in conjunction with this manual Cyclonic conditions In general this book refers to non cyclonic conditions Design information for cyclonic areas is in our Cyclonic Area Design Manual Warranties For over 150 years we have consistently manufactured the highest quality building products The LYSAGHT brand is synonymous with Australian building Our continuing confidence in our products is shown in the warranties we offer Our products are engineered to perform according to our specifications only if they are used in the appropriate conditions and installed to the recommendations in this manual and our other publications Naturally the warranties
60. cut ends of the roof cladding each side of the penetration Existing flashing If you have to re use lead flashings that are built into the structure special protection is needed Section 11 1 Method 1 Head gutter and apron flashings This is often the simplest method and commonly used for existing protrusions Figure 11 5 1 Method 2 Flat tray and sleeve To avoid fitting and sealing end caps to all the sheet ribs on the low side of the penetration an apron flashing can be fitted to the sleeve and sealed to the tray each side Apron flashing turned down between ribs Tray sealed and fixed to roofing N S Sleeve sealed and fixed to tray End of roofing turned up Sleeve with apron 2008 9 Edition Method 3 Tray gutter for steeper roofs INSTALLATION FLASHINGS 57 If the roof pitch is more than say 1 in 12 5 you cut the roof cladding sufficiently high above the penetration to allow a tray gutter to raise rainwater over the top of the sheet ribs and divert it around the penetration Figure 11 5 3 Cut side of roofing rib to match slope of tray Sides of tray turned up behind cut rib then sealed and fixed to rib Sleeve has clearance around protrusion Flash top of sleeve with over flashing from protrusion Ends of ribs sealed Tray sealed and fixed to roofing Ss Tray formed over rib then fixed amp sealed Tray notched amp turned down into pans End of roofing under
61. d You may need to use side lap fasteners where the cladding is laid a little out of alignment and the weather resistance of a joint is questionable Decide on the number of side lap fasteners by what looks effective in each individual case Where valley fasteners are used walling you need side lap fasteners along each lap at each support Alternatively a crest fastener may be used at each side lap in place of the side lap fastener and adjacent valley fastener as mentioned above in Section 8 4 Side lap fasteners are located in the centre of the crest of the overlapping corrugation Figures 8 4 1 and 8 4 2 8 6 Installing MINI ORB A little extra care is needed with MINI ORB to get the best appearance Detailed notes are in our brochure on MINI ORB We recommend using Ripple Teks for best visual results Ripple Teks are a registered trademark of ITW Buildex 2008 9 Edition 9 Installing concealed fixed cladding Concealed fixing is the method of fixing sheets using fasteners which do not pass through the sheet Instead the cladding is held in place with clips This is different from the alternative method called pierce fixing Chapter 8 The method of fixing you use is determined by the cladding profile you are using Concealed fixing is used for KLIP LOK MAXIMA KLIP LOK 700 KLIP LOK 406 LONGLINE 305 EASYCLAD Very steep pitches To prevent concealed fixed cladding from sliding downward in the fixing clip
62. d BlueScope Steel Limited will not be under or incur any liability to you for any direct or indirect loss or damage including without limitation consequential loss or damage such as loss of profit or anticipated profit loss of use damage to goodwill and loss due to delay however caused including without limitation breach of contract negligence and or breach of statute which you may suffer or incur in connection with this publication Copyright BlueScope Steel Limited Aug 26 2008 www lysaght com Information brochures and your local distributor 1800 641 417 Please check the latest information which is always available at www lysaght com LYSAGHT is a registered trademark of BlueScope Steel Limited ABN 16 000 011 058 The LYSAGHT range of products is exclusively made by BlueScope Steel Limited trading as BlueScope Lysaght Printed by BMP 3M0908 Gs BLUESCOPE LYSAGHT 9 5 320075 05615
63. deally long length sheets from a mobile rollformer should be used where possible as this eliminates the need for joining Order of laying For profiles other than LONGLINE 305 lay each run of sheets in turn from bottom to top before moving on to the next run For LONGLINE 305 lay all lower run of sheets first then lay the upper sheets Figure 10 4 3 Spacing of supports at end laps For the maximum spacing between purlins either side of an end lap in a roof use the spacing given for end spans terminology and spacing in Table 2 3 1 End laps in pitches less than 15 degrees End laps in roofs of less than 1 in 4 15 slope should be sealed with a sealant Use two runs of sealant Figure 10 4 4 e one run of sealant at the low end of the lap to prevent moisture being drawn in by capillary action e the other run at the high end to prevent condensation from running down the underside of the top sheet and entering the lap When the sheets are lapped together and fixed the compressed sealant should just appear at the end of the lap 1 With the top sheet upside down extrude a 3mm bead of sealant across the underside of this sheet about 25mm from the end 2 Position the bottom sheet then extrude a 3mm bead of sealant across the top of the sheet to encapsulate the cut end of the underlapping sheet 3 Turn the top sheet over and fit it in place The side lap between sheets of roofing has a cavity to prevent capillary
64. e first sheet Fix the next and subsequent clips and sheets 1 Fix the next row of clips one to each support Be sure the clip is 90 degrees to the edge of the sheet and the embossed arrow on the Figure 9 1 4 clip points in the correct direction Figure 9 1 1 Spur Flatten spurs in way of clips KLIP LOK 700 Engage the slots and tabs on the clips KLIP LOK 406 amp 700 Engage the clips over the rib of the installed sheet Figure 9 1 5 If a spur on the edge of the sheet fouls a clip flatten the spur with a rubber mallet to allow the clip to sit down over the rib Figure 9 1 4 2 As before place the next sheet over its clips also engaging the edge of the preceding sheet Figure 9 1 5 Clip engaged over rib of installed sheet 3 Accurately position the sheet so that it overhangs the desired amount into the gutter It is important that you keep the gutter end of all sheets in a straight line Using LYSAGHT Roofing and Walling 2008 9 Edition 38 INSTALLATION CONCEALED FIXING 4 Fully engage the two sheets along the overlapping rib You can do this by walking along the full length of the sheet with one foot in the centre pan of the previous sheet and the other foot applying vertical pressure to the top of the interlocking ribs at regular intervals It is important that you don t walk in the unsupported pan beside the overlap Figure 9 1 7 A rubber mallet may help engagement of laps on long spans 5 S
65. e the fasteners as for an end span layout in Figure 10 4 1 a terminology and spacing in Table 2 3 1 The thermal expansion is away from the fastener and towards the outer ends of the sheet run e Pierce fixed through valleys Position the lap centrally on the support and the fastening secures both the lap and the cladding Figure 10 4 1 b The thermal expansion is away from the fastener and towards the outer ends of the sheet run e Concealed fixed sheets You can either pierce fix through the crests or the valleys Figures 10 4 1 a and 10 4 1 b or use clips near the lap Figure 10 4 1 c KLIP LOK 406 sheets deform at the clips so that sheets won t nest together If you use clips the lap is placed just clear of and on the high side of the clip Figure 10 4 1 c The lap is secured with pierce fixing through the valleys The clips allow the sheets to slip when they expand with heat 2008 9 Edition To make the end lapping of KLIP LOK 406 easier remove for the length of the lap the down turn of the underlapping ribs of the top and bottom sheets in each sheet run Figure 10 4 2 The cut back ribs are covered by the sheets of the next sheet run LONGLINE 305 can be fixed using any of the three methods The underlapping ribs have to be slightly squashed at the lap to allow them to nest An end lap tool is available KLIP LOK 700HS should not be end lapped Instead an expansion joint must be used Refer to Section 10 5 below I
66. e them in your building or construction to ensure all components have arrived are of the appropriate quality and are ready for installation Limitation of Liability By using this Guide you accept the risks and responsibility for all losses damages costs and other consequences resulting directly or indirectly from using this Guide To the maximum extent permitted by law BlueScope Lysaght s liability whether arising under statute contract tort including negligence equity or otherwise to any persons whatsoever in respect of anything done or not done arising directly or indirectly by any such person in reliance whether in whole or in part on this Guide is limited at BlueScope Lysaght s option to a in the case of goods the repair of the goods the replacement of the goods or paying for the cost of repair or replacement of he goods o b in the case of services the resupply of services or paying for he cost of resupplying the services This publication is intended to be an aid for professional engineers in design matters and builders or roofing contractors in relation to construction and is not a substitute for professional judgement Terms and conditions of sale are available at local BlueScope Lysaght sales offices Published by BlueScope Lysaght Limited BlueScope Lysaght Limited 2008 Lysaght Roofing amp Walling Users Guide Previously published as Steel Roofing and Walling Installation M
67. eel roofing and walling products Selection guide TB 2 Overpainting and restoration of COLORBOND prepainted steel sheet TB 4 Maintenance of COLORBOND prepainted steel roofing TB 5 Swarf staining of steel roofing and walling profiles TB 8 Flashing materials for ZINCALUME amp COLORBOND steel sheet TB 13 General guide to good practice in the use of steel roofing and walling products TB 15 Recommended steel gutter systems TB 16 Fasteners for roofing and walling product Selection guide TB 17 Selection guide for galvanised steel purlin products Technical bulletins Corrosion CTB 1 General introduction CTB 8 Building applications CTB 10 Roof penetrations CTB 11 Condensation CTB 12 Dissimilar metals CTB 13 Contact with timber CTB 15 Acid cleaning brickwork CTB 16 Immersion CTB 17 Following trades CTB 18 Painting lead flashing The full range of TBs and CTBs are available for download from our website www lysaght com 2008 9 Edition Index A alignment of roofing KLIP LOK 700HS 38 pierced fixed 32 Australian Standards 62 blocking rib cavities 47 bullnosed see pre curved roofs 18 bushfire protection 61 C cappings See flashings care of products 27 clean up 28 clips for EASYCLAD 40 for KLIP LOK 35 for LONGLINE 305 42 required quantities 11 coatings stripable 28 COLORBOND 2 and painting 4 avoiding rust stains 28 compatibility of materials 4 drainage table 5 concealed fixing See inst
68. egrity sealing plate 12 1 1x65 M5 5 1 1x65 Crest fixed Hex head self drilling self tapping screws with EPDM seal hex washer head shank protection and Integrity sealing plate 12 14x65 M5 5 14x65 Crest 4 fastenerst ENS ANNA 2 a KLIP LOK 700HS and KLIP LOK MAXIMA Use 3 screws per clip DESIGN FASTENERS Do not fix screws less than 25mm from the end of sheet Fixing to steel up to 0 75 mm BMT Fixing to steel gt 0 75 to 3 mm BMT Fixing to timber M6 11x25 Roofzips Hex head self drilling self tapping screws for thin metal battens Concealed fixed A i easier to install 12 14x30 M5 5 1 1x30 Hex head self drilling self tapping screws with hex washer head 15 15 x 25 Hex head self drilling self tapping screws with hex washer head 12 14x25 M5 5 1 1x25 OR Longer screws may be Type 17 screws SOFTWOOD HARDWOOD with hex washer head 12 1 1x40 M5 5 1 1x40 12 1 1x25 M5 5 1 1x25 F a flashing KLIP LOK 700HS KLIP LOK MAXIMA 1 Clip First clip S econd clip Roofzips are registered trademarks of ITW Buildex and are recommended for specific applications KLIP LOK 406 and LONGLINE 305 13 Fixing to steel up to 0 75 mm BMT Fixing to steel gt 0 75 to 3 mm BMT Fixing to timber Self drilling self tapping screws with wafer head 12 12x25 M5 5 12x25 Concealed fixed Self drilling self tapping screws with wafer head
69. et angles cutting the ribs and bending the pans at the ridgeline The same process is used on Mansard roofs Caps are fitted over the cut ribs which open up when the pans are bent Fitting the rib caps can be time consuming and care must be taken with sealing to avoid any possibility of leakage The ribs must be cut squarely with a metal cutting blade in a power saw set to the depth of the rib minus 2mm In some states pressed steel caps can be obtained to suit KLIP LOK ribs Seal generously though the range of angles is limited Caps can be handmade to suit any all around angle from flat sheet sa l f f gt adjust angle to fit and fasten Tray cladding can be used in continuous lengths from eave to eave by N Custom made caps are Fasten on both KLIP LOK is most frequently used for capped bent ribbed roofs but sides on upper rib LONGLINE 305 TRIMDEK or even SPANDEK can be used For these four Figure 4 5 1 profiles the rib caps can be made from pieces of rib profile cut from a Capped bent ribbed roof short length of cladding 4 6 Tapered roofing We can taper LONGLINE 305 in its width at either end to produce a sheet that lends itself to a wide range of roof designs The maximum reduction in width is 50 The taper can be left hand or right hand Figure 4 6 1 Get our advice for long spans or high loadings LONGLINE 305 tapered from full width to 50 Standard width cover 305 mm Fluted cover 300 mm Width
70. ffecting drainage capacity and waterproof ness of the laps of a profile include e the width and depth of the valleys or pans e the pitch of the roof rain flows faster on a steeper pitch e rainfall intensity for the geographical area e the length of the roof from ridge to gutter and e penetrations that cause nearby valleys to carry extra rain diverted from valleys obstructed by the penetration Figure 2 4 1 The maximum recommended roof lengths for drainage for each profile are given in Table 2 4 1 at the end of this chapter Using LYSAGHT Roofing and Walling DESIGN DESIGN PRELIMINARIES 3 2 5 Low roof pitches Unless there is adequate positive fall in a roof there is danger of ponding which can lead to a reduced service life particularly in coastal areas At low slopes say around 1 in 50 1 slope all roof supports must be in the one plane because slight variations can result in zero or negative fall This may occur even after completion of the building as the result of settlement timber warping or shrinking or extra loadings like air conditioners Wherever possible you should design for a minimum slope of 1 in 30 2 Minimum recommended slopes are listed in Table 2 3 1 at the end of this chapter 2 6 Wind forces on roofs Winds create considerable forces on both the topside and the underside of roof cladding and you must consider these forces in the design and fixing of any roof The forces a
71. fixed profiles For number of fasteners see equation at right n is the number of fasteners per support as shown in the diagrams in Table 3 8 1 Side laps Side lap fasteners are often placed at about 900mm centres see equation at right 3 8 Recommended fasteners and locations Recommended fasteners and their locations are in Table 3 8 1 Fastener length with insulation Where insulation is installed under cladding you may need to increase the length of screws given in Table 3 8 1 depending on the density and thickness of the insulation When the screw is properly tightened Section 3 6 e INTO METAL there should be at least three threads protruding past the support you are fixing to but the shank protection must not reach that support e INTO TIMBER the screw must penetrate the timber by the same amount that the recommended screw would do if there were no insulation Fixing to steel thicker than 3mm e Use Hex head self drilling screws with seal with an extended drill point or e ina pre drilled hole use Hex head self drilling screws with seal of 12 gauge M5 5 14 pitch with the length as specified in Table 3 8 1 Side lap and accessory fastenings For MINI ORB and PANELRIB use 3 2mm diameter aluminium sealed blind rivets For all other products use e Stitching screws with seal 8 15 x 15 or e Hex head self drilling screws with seal 10 16 x 16 or e Sealed blind rivets 4 8mm diameter aluminium not MINI ORB a
72. foot Ear awaiting flattening 3 With a rubber mallet fold the protruding ears flush against the Figure 10 1 5 backing tool Using the backing tool for flush turn up on KLIP LOK Using LYSAGHT Roofing and Walling 2008 9 Edition 46 INSTALLATION ENDS OF SHEETS Part of rib 2 removed 90 Fold ears against tool for a flush turn up Figure 10 1 6 Turning up LONGLINE 305 Figure 10 2 1 Turning down the gutter end TRIMDEK shown Figure 10 2 2 Turning down the gutter end LONGLINE 305 shown Using LYSAGHT Roofing and Walling Turning up LONGLINE 305 Flush turn ups are usually used on LONGLINE 305 Cut off a portion of the female rib for at least 50mm For a flush turn up you also need to cut the crown of the centre rib for at least 50mm Holding the end of the tool against the end of the sheet pull the handle up 90 If turning up flush fold the protruding ears flush against the turn up tool with a rubber mallet Figure 10 1 6 10 2 Turning down At the low end of roofing wind or capillary action can cause water to run back up the underside of the cladding To minimise this problem you turn down the valleys or pans at the low end of roofing The process is called turning down or lipping All roofing on slopes below 1 in 5 10 must be turned down Turn down tools are available for all our roofing profiles except CUSTOM ORB SPANDEK and tapered LONGLINE 305 The valleys
73. g 55 notching tools 53 notching with tinsnips 54 transverse 53 walls 59 G gutters areas 26 typical types 25 H handling products 27 heat control 20 holes 27 l incompatibility See compatibility of materials infill strips 47 information 1 installation alignment of roofing 32 concealed fixing 35 EASYCLAD HI TEN 40 KLIP LOK on walls 39 KLIP LOK 35 LONGLINE 305 42 pierce fixed 31 crest fixing 33 MINI ORB 34 procedure 31 side laps 33 34 valley fixing 34 insulation fastener length 11 heat 20 materials 22 noise 22 thickness limitations 23 2008 9 Edition 64 INDEX L lengths roofing 3 roofing drainage 8 transportation 4 lifting roofing 31 maintenance 29 marking out 27 MAXIMA28 materials cladding specifications 2 for fasteners 9 for flashings 52 for insulation 22 MINI ORB 34 nails See fasteners noise reduction 22 notching See flashings P pencils for marking out 27 performance tests 3 pierce fixing See installation pitches of roofs 3 products profiles 6 selection 2 profiles of claddings 6 Q quantities of clips amp fasteners 11 rainfall intensities table 25 references 62 rivets See fasteners roof alignment of sheets 32 curved 16 bullnosed see pre curved roofs 18 capped bent ribed 19 pre curved 18 spring arched 17 spring curved 18 spring curved ridge 16 design 2 drainage design 24 downpipe locating 26 downpipe size 25 26 gutter areas amp downpipes 26 gutter
74. hich could lead to discolouration and or deterioration of the sheet coating and also contributes to thermally induced roof noise If some oilcanning in the pans is acceptable these profiles can be spring curved up to a maximum slope of 1 in 30 2 with the spacing between the purlins at the ridge being slightly less than the internal span recommended for the profile in Table 2 3 1 Over the supports at the ridge very slight crease marks may appear in the pans or valleys when subjected to foot traffic They don t affect strength and will usually not be seen from the ground Only the sheet profiles recommended for spring curving are shown in Table 4 1 1 Each sheet is first fixed to one side of the roof and then pulled down to be fixed to the other side To minimise small laying errors lay alternate sheets from opposite sides of the roof Side laps should be sealed with silicone sealant for the length of the curve 2008 9 Edition DESIGN CURVED BENT AND TAPERED ROOFING 17 Table 4 1 1 Minimum spacing of purlins at ridge for spring curved ridge roof mm l in 20 lin 15 lin 12 lin 10 ling 6 4 5 6 SPANDEK 0 42 BMT 1400 1500 SPANDEK 0 48 BMT 1500 1600 1700 CUSTOM ORB 0 42 BMT 1200 CUSTOM ORB 0 48 BMT 1300 1400 CUSTOM BLUE ORB 0 6 BMT 1200 1300 1400 Blank spaces are combinations not recommended 4 2 Spring arched roof Sheets in a spring arched convex roof are curved in a radius from eave
75. ign details in valleys where heat tends to be retained and or e insulating the roof space to reduce the thermal differential In tropical areas it may be better to insulate the ceiling rather than the roofing which can also reduce noise Using LYSAGHT Roofing and Walling 5 4 Insulation materials Typical insulation materials are reflective foil laminates insulation blankets or batts made from fibreglass and boards made from polystyrene Remember that the colour of cladding also has a marked effect Section 5 1 Foil laminates Foil laminates reflect heat and can double up as a vapour barrier to control condensation Where they are used as a vapour barrier the joints between successive strips are overlapped about 100mm and sealed with a tape impervious to moisture Blankets and batts Blankets and batts minimise heat convection and are available with the laminate bonded to the fibreglass They are also effective in reducing noise Insulation blankets must be protected from moisture particularly around the edges of the roof and even more particularly at the bottom end of the cladding where rainwater run off can be blown back under a low pitched roof If the blanket overhangs the bottom support it may even come into contact with water in the gutter where the insulation will absorb moisture and remain damp for extended periods thus leading to deterioration of the coating on the underside of the roofing and reducing the effect
76. igure 9 3 1 Using a trim channel to start Support Figure 9 3 2 Using a clip to start Using LYSAGHT Roofing and Walling 9 3 Installing Easyclad You can use EASYCLAD for walls soffit linings or ceilings Use a similar installation procedure for all EASYCLAD 2PF300 2 pans per sheet and 4P300 4 pans per sheet are pierce fixed through the underlapping edge of each sheet The fasteners in one sheet are concealed by the leading edge of the next For the last sheet a trim channel is used If you are using EASYCLAD with the ribs horizontal start installing from the bottom of the wall so that the joints between panels tend to shed water Figure 9 3 6 You can use either of two methods to fix the first panel a CD39 trim channel or CD40 starting clips Start method 1 Using a trim channel With particular care fix a trim channel at each support Be careful to locate it correctly in relation to other parts of the building see Section 8 1 Position first sheet e Use trim channel CD1 with EASYCLAD 4P300 e Use trim channel CD39 with EASYCLAD 2PF300 The first EASYCLAD panel is held in place by fitting it into the fixed trim channel Figure 9 3 1 Start method 2 Using clips With particular care fix starting clips at each support Be careful to locate them correctly in relation to other parts of the building see Section 8 1 Position first sheet Hook the lip of an EASYCLAD sheet under these clips
77. imilarly engage all the clips by applying vertical foot pressure to the top of the other ribs over each clip oo It is essential that the sheets interlock completely It is important that your Don t step in this pan K f i f until ribs are engaged weight is fully on the sheet you are installing KLIP LOK 700 KLIP LOK 406 amp 700 The spurs on the free edge of the underlapping rib must be fully engaged in the shoulder of the overlapping rib Figure 9 1 7 You will hear a distinct click as the spurs snap in Spurs on edge of bottom sheet must be fully engaged in shoulder of top sheet KLIP LOK 406 Figure 9 1 7 Engaging edges of sheets Check alignment occasionally Occasionally check that the sheets are still parallel with the first sheet by taking two measurements across the width of the fixed cladding Figure Fixed sheets Puring 9 1 8 Early check kater eee At about half way through the job perform a similar check but take the measurements from the finishing line to aim for the final sheet to be parallel with the end of the roof If the measurements are not close enough lay subsequent sheets very slightly out of parallel to gradually correct the error To allow this to happen flatten the tabs on the base of Figure 9 1 8 subsequent clips the slot in the clip will allow the clips to be fixed out of Check alignment occasionally standard pitch Start Finish Early checks L
78. ing Roof drainage 6 1 Introduction 6 2 Design of drainage eaves gutter system 6 3 Gutter fall Using LYSAGHT Roofing and Walling Contents N BPRRWWWWWNYNY PD PART B INSTALLATION General care safety and handling 7 1 Safety 7 2 Care and storage before installation 7 3 Handling cladding on site 7 4 Walking on roofs 7 5 Marking out cutting and drilling 7 6 Clean up 7 7 Warn other contractors 7 8 Strippable coatings 7 9 Sealants 7 10 Maintenance Installing pierce fixed cladding 8 1 General installation procedure 8 2 Side lapping amp positioning pierce fixed sheets 8 3 Pierce fixing on crests 8 4 Pierce fixing on valleys for walling only 8 5 Pierce fixing on side laps 8 6 Installing MINI ORB Installing concealed fixed cladding 9 1 Installing KLIP LOK roofs 9 2 Installing KLIP LOK walls 9 3 Installing EASYCLAD HI TEN 9 4 Installing LONGLINE 305 roofs 9 5 Installing LONGLINE 305 walls Ends of sheets 10 1 Turn ups 0 2 Turning down 0 3 Blocking off rib cavities 10 4 End lapping 10 5 Expansion 0 6 Roof overhang with edge stiffener Flashings 1 1 Materials 1 2 Longitudinal flashings 11 3 Transverse flashings 11 4 Flashing at change of pitch 1 5 Flashing large roof penetrations 1 6 Flashing small roof penetrations 11 7 Flashing walls 11 8 Bushfire protection References Index 2008 9 Edition Contemporary and traditional residential or commercial all are a
79. ing finish the joint as soon as practical after applying the beads of sealant The manufacturer s specified sealant open times should be followed Using LYSAGHT Roofing and Walling CARE AND HANDLING 29 Sealant clean up With practice you will be able to judge the size of beads thus avoiding squeeze out and the subsequent need to clean up Uncured sealant can be removed with a clean dry rag and any excess then removed with a cloth lightly dampened with mineral turpentine or white spirits Excess cured sealant is best removed with a plastic spatula to avoid damage to the surface finish of the metal Avoid any unnecessary smearing of sealant on surfaces intended for painting as silicone can affect adhesion of paint Smeared sealant may be treated by lightly abrading the area with a non metallic scouring medium 7 10 Maintenance Factors that most affect the long life of a roof or wall are original design the environment of the installation and the maintenance of the installation Maintenance is probably the biggest factor Maintenance includes e Regular inspection for problems before they become major corrosion sites e Regular washing down especially near coastal or industrial influences e Removal of leaves and other debris from gutters downpipes leaf guards slots holes and other overflow devices e Keep walls free of soil concrete and debris near the ground e Don t overspray pesticide Sealant 25 mm
80. ing from moving when walked on AS CO i A i WH Shank hole enlarger LA Enlarges the hole in the sheeting to minimise damage to the protective coating on the screw Dwell section Prevents the sheeting from riding up during fixing and minimises distortion of the profile Drill point Extended Roofzip Drill point 3 5 Identification of screws The format of the number code is 12 M5 5 20 X 45 Screw gauge Thread pitch Overall length of the Thread outside threads per screw measured from diameter number inch under the head mm in brackets is metric equivalent Fasteners must have a coating system to meet AS 3566 Class 3 or Fasteners must have a coating system to meet AS 3566 Class 4 Standard metal drill point point Type 17 Bremick ITW Buildex and other quality fasteners which comply to the above standards are recommended for use with LYSAGHT roofing and Figure 3 5 1 walling products Ripple Teks and Roofzips are registered trademarks Typical hexagon headed screws of ITW Buildex and are recommended for specific applications Table 3 5 1 Features of recommended screws Screw type Head Seal Shank protection Drill point Metal Hex head self drilling Hexagon washer EPDM Depends on screw length amp pam f 5 Self drilling for metal screw with seal Roofzip or wafer or none use Timber Type 17 Hex head Hexagon washer EPDM Depends on screw
81. is pulled tight enough to hold the blanket hard against the underside of the roofing so as to dampen the rain induced vibration at the point of impact If the blanket is not hard against the roofing the noise reduction will not be as good For purlin spacings over 1200mm first lay wire mesh over the purlins tighten and fix it before laying the membrane Thermally induced noise Roofing expands and contracts due to temperature changes in the cladding and particularly rapid changes can be caused by passing clouds or a strong breeze For example if a passing cloud suddenly shades the roof from the sun the cladding temperature could drop about 3 C after 30 seconds in shade and about 10 C after 2 minutes in shade Thermally induced noise is caused by slipping at fasteners where the roof expands relative to its supports The slipping is controlled by the friction between the roof and its supports When the static friction is overcome impulsively sounds are produced sometimes as loud as a pistol shot the higher the friction the louder the sound The noise can be reduced by e placing a material with low coefficient of friction between the roofing and its supports for example PVC tape or strips of foil laminate e choosing steel supports rather than timber lower coefficient of friction e choosing light coloured roofing e venting the roof space e including an expansion joint Section 10 5 e being careful about des
82. is used The following sections should be considered as a guide only For a comprehensive account of flashing guidelines refer to HB39 1997 Similar methods of flashing are used for different cladding profiles You can adapt the principles to suit your application In all cases it is important to have ample cover provided by the flashing and proper turn up of the cladding underneath Be careful when moving between supports Do not walk in the pan immediately adjacent to flashings or translucent sheeting Walk at least one pan away BlueScope Lysaght has a range of standard flashings We can also supply custom flashings to your requirements ask your local service centre for details 11 1 Materials It is very important that flashings be made from materials that are compatible with the cladding Section 2 10 Lead flashing is not recommended however it will usually be retained when re roofing because it is usually cemented into the structure In these cases e the top surface of the lead flashing must be painted with a good quality exterior paint system to limit contamination with lead compounds in water running off the flashing and e there must be a barrier between the lead flashing and the cladding either a plastic strip such as polythene dampcourse or paint Flashings should conform to AS NZS 2179 1 1994 and be compatible with the cladding Section 2 10 Materials for flashings are available in ZINCALUME or CO
83. iveness of the insulation Insulation blankets up to a nominal thickness of up to 100mm for pierce fixed cladding and KLIP LOK 700 and up to 50mm for KLIP LOK 406 and all other concealed fixed profiles will compress sufficiently over the roof supports to allow normal procedures to be used for fixing However you may need to increase the length of fasteners slightly to allow for the thickness of the compressed blanket between the cladding and support see Table 3 8 1 Polystyrene boards Expanded and extruded polystyrene is also used for the same purposes as blankets and batts The boards are more rigid and relatively less compressible which demand different fixing to that mentioned above Seek advice from manufacturers of polystyrene insulation 2008 9 Edition DESIGN INSULATION AND SKYLIGHTING 23 5 5 Insulation thickness glass wool Insulation blankets and batts can cause cladding to bow out between the fasteners To minimise this problem the maximum thickness of blankets and batts should be 100mm for pierce fixed cladding and KLIP LOK 700 and 50mm for KLIP LOK 406 and all other concealed fixed cladding Maximum density 12kg m3 For more dense glass wool and rock wool spacers are recommended 5 6 Skylighting N N N One of the simplest methods of getting natural light through a f X N steel roof is the inclusion of translucent sheets which match Lap translucent sheet the steel profiles over steel sheet on both sides Figure
84. l l SF P l eae Sg Starting finishing clip Top fixing cli Figure 9 4 1 LONGLINE 305 clips Bend tab down over rib Overlapping rib RY w x08 ene Underlapping rib Figure 9 4 2 Placing first sheet Figure 9 4 3 Place top fixing clips Using LYSAGHT Roofing and Walling 9 4 Installing LONGLINE 305 roofs For LONGLINE 305 standard width fluted or tapered use the same general procedure described in Section 8 1 General installation procedure However at the start of installing LONGLINE 305 a row of clips is fixed to the supports before the first sheet is located over them and locked in position Clips The 2 clips are shown in Figure 9 4 1 Preparation Cut all starting finishing clips and discard the unwanted pieces Figure 9 4 1 As described in General installation procedure Section 8 1 e check flatness slope and overhang and e orient the sheets before lifting Note the overlapping rib is towards the end of the building where you start Figure 9 4 2 Fix the first row of clips With particular care determine the location of the first sheet and mark the edge of the sheet on the purlins see Section 8 1 Position first sheet Fix the first clip on the purlin Using a string line or the first sheet as a straight edge fix the other starting clips for the first sheet Place the first sheet 1 Locate the first sheet over the fixed clips Figure 9 4 2 2 Using a measurement from the gut
85. n of the sheet coating reduced life expectancy or poor appearance Where damming of any valley or tray is unavoidable due to the size of the pipe penetration treat the installation as a large penetration Section 11 5 Copper penetrations All copper pipe penetrations through ZINCALUME or COLORBOND cladding must be physically and electrically isolated from the cladding This can be done by using a sleeve of PVC polythene or similar plastic that is also ultra violet stable 2008 9 Edition INSTALLATION FLASHINGS 59 11 7 Flashing walls Cladding is usually installed with the profile running vertically or horizontally though sheets have been laid diagonally the choice is aesthetic Wind can drive rain hard against wall flashings so it is important that you pay attention to the detailing of flashings around windows doors re entrant and external corners to ensure you get a watertight building You also want a neat appearance We make wall flashings for some wall claddings like EASYCLAD and MINI ORB which are sometimes called trims Where these are not suitable custom made flashings can be easily produced following the general principles described in this section Walling profile running horizontally e Itis usual to lay the first sheet at the bottom of a wall and work upwards towards the eaves You want the window and door flashings to fit properly into the valleys so you should locate the first sheet relative to the
86. nd PANELRIB see above Using LYSAGHT Roofing and Walling DESIGN FASTENERS 11 Number of clips per job Number of purlins x Number of sheets 1 Number of fasteners per job for pierced fixing n x Number of sheets x Number of supports Number of side lap fasteners per sheet Support spacing inmm x Number of supports 900 2008 9 Edition 12 DESIGN FASTENERS Table 3 8 1 Guide to fasteners without insulation CUSTOM ORB AND CUSTOM BLUE ORB Fixing to steel Fixing to steel ayn P up to 0 75 mm emT gt 0 75 to 3 mm amt Fiiing to timber M6 I 1x50 Roofzips or M5 5 14x37 5 M6 1 1x50 Roofzips or Hex head self drilling screw with EPDM seal for Crest thin metal battens fixed 12 1 1x50 M5 5 1 1x50 Hex head self drilling screw with EPDM seal and hex washer head and shank protection 12 14x35 M5 5 14x35 Type 17 Hex head self drilling screw for timber with EPDM seal and shank protection SOFTWOOD 12 1 1x50 M5 5 1 1x50 with Higrip amp Shank protection HARDWOOD 2 1 1x40 M5 5 1 1x40 with Shank protection Hex head self drilling screw with EPDM seal and hex washer head 10 16x16 M4 8 16x16 Valley fixed Hex head self drilling self tapping screw with hex washer head for timber amp EPDM seal 10 12x20 M4 8 12x20 Hex head self drilling screw with EPDM seal and hex washer head 10 16x16 M4 8 16x16 M6 1 1x25 Roofzips or Hex head self drilling screw for tim
87. ng left on the surfaces of materials will cause rust stains which can lead to reduced life of the material e Sweep or hose all metallic swarf and other debris from roof areas and gutters at the end of each day and at the completion of the installation Failure to do so can lead to blockages of water flow or surface staining such as when the metal particles rust e If swarf has become stuck on a finish it can be removed Take great care not to remove the paint or the metal coatings e For critical applications inspect the job two weeks after completion when rain or condensation will have caused any remaining swarf to rust and thus highlight affected areas 7 7 Warn other contractors Many stains arising from swarf do so not from the work of roofing installers but from other contractors working on the job Similarly problems can arise from contact with incompatible materials like copper piping or chemically treated timber Acid cleaning of bricks can also be a problem Architects and builders need to be aware of this and warn contractors accordingly 7 8 Strippable coatings To provide temporary protection during production handling and transport some COLORBOND products are coated with a plastic This coating peels off easily when new but it has a relatively short life especially in sunlight If you don t remove this coating at the time of installation you may find it very hard to remove later on Please dispo
88. nia Hobart 99 155 Northern Territory Alice Springs 139 204 Darwin 285 366 Emline OG Quad Trimline Eaves gutters SPANDEK HI TEN sheet to fully support bottom of gutter along whole length Box gutter Figure 6 1 1 Typical gutters 2008 9 Edition Box gutter bracket adjustable for fall 26 DESIGN ROOF DRAINAGE 100 Example Find the maximum catchment area for 30 each downpipe on a house in Hobart a using Trimline gutter E 4 80 a DATA a Design rainfall intensity 99 Table 6 2 1 70 N Gutter area 7800 Table 6 2 2 S gz N amp 6 SOLUTION from Figure 6 2 2 g SS Catchment area for each downpipe 81 m2 5 50 8 ASS E oie 49 H 5 n 2 20 5 30 s QO i BSS E A Ea LA 20 500 ae p Design 5 is c i ey br 10 rainfall intensities i m rainfal nests mm h mm h aa 0 Effective cross sectional area of eaves gutter mm Gradient steeper than 1 500 3000 4000 5000 6000 7000 8000 9000 10000 11000 12000 Effective cross sectional area of eaves gutter mm Gradient steeper than 1 500 Figure 6 2 2 Table 6 2 2 Cross sectional area of eaves gutters required for various Gutter areas and downpipes roof catchment areas where gradient of gutter is flatter than 1 500 Adapted from AS 3500 3 2003 Minimum standard downpipe sizes
89. nt area shown by the graph If a catchment area is too big then you can e increase the number of downpipes e reposition the downpipes and or the high points e choose a gutter with bigger effective cross sectional area then repeat the above from Step 7 11 Decide on the downpipe size Recommendations in AS NZS 3500 3 2 1998 suggest that the area of round pipes should be equal to the area of the gutter whilst the area of square or rectangular pipes may be 20 smaller Table 6 2 2 12 Consider measures to counter overflow of gutters into the building 6 3 Gutter fall Install gutters with a suitable fall to avoid ponding and to allow water to easily flow away Steeper falls are preferred for prolonged life of the gutter Refer to the BCA and the Australian Standards for guidance Using LYSAGHT Roofing and Walling DESIGN ROOF DRAINAGE Table 6 2 1 Design rainfall intensities 25 For overflow of eaves gutters once in 20 years For overflow of internal box gutters once in 100 years mm hour mm hour A C T Canberra 137 194 New South Wales Broken Hill 130 181 Bathurst 143 197 Sydney 214 273 Newcastle 18 233 Victoria Mildura 125 174 Melbourne 127 186 Ballarat 127 184 Queensland Brisbane 251 333 Rockhampton 248 336 Mackay 273 363 Mt Isa 169 223 Townsville 260 346 Cairns 282 368 South Australia Mount Gambier 108 168 Adelaide 123 186 Western Australia Geraldton 132 173 Perth 146 214 Tasma
90. of CUSTOM ORB corrugated cladding can be turned down with multigrips pliers or a shifting spanner Figure 10 1 2 Turning down is usually done after the cladding is fixed on the roof provided there is no obstruction to the operation of the turn down tool e Push the turn down tool over the end of the tray as far as it will go e Hold the tool hard against the end of the tray and push the handle to form a turn down about 20 2008 9 Edition Sheet ends on low slopes and overlaps For claddings laid on laid on slopes of 5 degrees or less the underlap lip of the under sheet may require to be cut back on the corner at the downhill end of the sheet to block capillary action Figure 10 2 3 This may be required where the return lip of the underlapping sheet nests snugly with the overlapping sheet without a gap or where there is interference with the down turning of the valley 10 3 Blocking off rib cavities Dust insects birds rodents and wind driven rain can enter a building through the cavities under ribs To minimise these problems the cavities can be blocked off Rib end stops are available for KLIP LOK strips of plastic foam can be used for other profiles Fitting KLIP LOK rib end stops during sheet installation Fix the rib end stops to the side of the eaves support after the KLIP LOK clip has been secured in position Align the rib end stops with the upstands of the fixing clips Figure 10 3 1 Fitting KLIP LOK rib end
91. ofiled closed cell infill D d Walling INTERNAL LINING Profiled closed cell infill Typical re entrant corner flashing profile running horizontally plan Profiled closed cell infill Walling Corner studs INTERNAL LINING Flashing Profiled closed cell infill INTERNAL LINING Typical external corner flashing type 2 profile running horizontally plan Figure 11 7 2 Typical corner flashings profile running horizontally plan view Using LYSAGHT Roofing and Walling Stud INTERNAL LINING a Window Walling frame Jamb flashing Plan view option Stud ON INTERNAL LINING Window Walling frame Jamb flashing Profiled closed cell infill Plan view option 2 Jamb flashing Window sash Sill Sill flashing Jamb flashing brought to outside Elevation Ing through slit in valley of corrugation Figure 11 7 3 Typical flashing at window and door jambs profile running horizontally 2008 9 Edition Walling profile running vertically Flashings are generally easier on jobs where the profile runs vertically Figures 11 7 4 and 11 7 5 he 2 Y Z Profiled 2 closed cell z infill under Ne E Flashing Header L Window frame A Window frame Sill H Flashing DN R n 5 Profiled 2 closed cell Z
92. or transverse flashings You must properly fix both flashings and the ends of all sheets Where the cladding is pierce fixed through crests and the position of the purlin allows it the fasteners used to fix the sheets may also fix the flashings On all other installations pierce fix your flashing to the ribs or crests of the sheets 2008 9 Edition Table 3 8 1 shows the fasteners and their locations for the ends of sheets Figure 11 3 1 Joining flashings The overlaps of transverse flashings should be sealed with a recommended sealant and fastened Before finally positioning and fixing the lap turn over the top piece and apply a 3mm bead of sealant across the flashing about 12mm from the end 11 4 Flashing at change of pitch Change of pitch Flashing at without flashing change of pitch Figure 11 4 1 Typical flashing at changes of pitch Using LYSAGHT Roofing and Walling INSTALLATION FLASHINGS 55 Capping with lower edge turned down gt z gt gt XS By j Figure 11 3 3 Using a template to mark out for notching with tinsnips Small gap between sheets avoids abrasion 2008 9 Edition 56 INSTALLATION FLASHINGS Head gutter positioned under sheet sealed and fastened to sheeting Support gutter amp ends of roofing Check flashing to masonry structure is embedded into mortar joints prior to fitting apron flashing under Steel apron flashing notched amp turned down
93. over rough surfaces or over each other Always carry tools don t drag them 7 4 Walking on roofs It is important that you walk on roofing carefully to avoid damage to either the roofing or yourself Generally keep your weight evenly distributed over the soles of both feet to avoid concentrating your weight on either heels Using LYSAGHT Roofing and Walling CARE AND HANDLING 27 or toes Always wear smooth soft soled shoes avoid ribbed soles that pick up and hold small stones swarf and other objects When you walk parallel to the ribs e for ribbed roofing walk on at least two ribs or corrugations CUSTOM ORB CUSTOM BLUE ORB and SPANDEK e for pan type roofing walk in the pans LONGLINE 305 KLIP LOK 406 KLIP LOK 700 KLIP LOK 700 TRIMDEK INTEGRITY 820 When you walk across the ribs walk over or close to the roofing supports Be careful when moving between supports Do not walk in the pan immediately adjacent to flashings or translucent sheeting Walk at least one pan away Always take particular care when walking on wet or newly laid sheets particularly on steeply pitched roofs If there will be heavy foot traffic on a roof provide a temporary walkway or working platform to minimise damage 7 5 Marking out cutting and drilling Marking out A pencil of any colour may be used except black or so called lead pencils Don t use black pencils to mark roofing or walling because the graphite content can cre
94. pe Lysaght e For peak rainfall intensities in your locality see Chapter 6 LYSAGHT FLATDEK and FLATDEK II are recommended for home improvement use only carports verandahs where weathertightness is not of primary importance Drainage figures are therefore not supplied Using LYSAGHT Roofing and Walling 2008 9 Edition 3 Fasteners DESIGN FASTENERS When you select fasteners you should consider the design life of the structure because the fasteners and the cladding material should have similar life expectancies Fastener change to metric sizing The Australian fastener industry is moving to a change in fastener description that will bring it into line with international markets This is an on going process as product requirements and design changes Traditionally self drilling fasteners have been described in gauge outside thread diameter by tpi threads per inch and by length mm The new changes will convert gauge to metric sizing eg 12 is approx M5 5 3 1 Materials for screws Screws are available in a variety of materials finishes and colours to match COLORBOND prepainted steel and design You should use screws to AS 3566 2002 Class 3 or better Additional information on fastener finishes is in the technical bulletin TB 16 Product Appropriate screw materials For most external applications not closer than 400 metres from the ocean or severe marine influence COLORBOND or METALLIC ZI
95. re e inward forces tending to collapse the roof cladding inwards caused by wind acting directly on the windward side and outward forces tending to lift the roof cladding from its framing and the entire roof structure from the rest of the building Outward forces can be caused both by uplift from negative wind pressures outside the building and by positive wind pressure inside the building Generally the greatest wind forces imposed on roofs are due to the outward forces Because the dead weight of roofing materials is relatively small the outward forces must be resisted by the roof fasteners It is very important that the battens and roof framing are adequately fixed to the rafters and walls and that under extreme conditions the wall framing is anchored to the footings Special anchoring provisions may apply in cyclonic areas Specialist advice should be sought in these circumstances 2 8 Codes and performance tests AS 1562 1 1992 specifies the design and installation of sheet metal roof and wall cladding Our roofing profiles satisfy all the requirements of this standard including the ability of the roof to resist outward forces and concentrated loads The testing is performed according to AS 4040 2008 9 Edition 4 DESIGN DESIGN PRELIMINARIES Metal roofing products must comply with the performance specifications and be checked by stringent tests in accordance with the standard Such tests have been carried out
96. re 10 1 2 Turning up CUSTOM ORB ZB Figure 10 1 3 Turning up TRIMDEK shown Completed qurn UPS Figure 10 1 4 KLIP LOK tool ready for turn up Using LYSAGHT Roofing and Walling This chapter describes how you can treat the ends of sheets to maximise waterproofing or to stop vermin entering 10 1 Turn ups At the high end of roofing wind can drive water uphill under the flashing or capping into a building To minimise this problem you turn up the valleys or pans at the high end of roofing The process is called turning up or stop ending All roofing on slopes below 1 in 2 25 should be turned up Turn up tools are available for all our roofing profiles except CUSTOM ORB and LONGLINE 305 when it is tapered Figure 10 1 1 on the next page You can turn up sheets before or after they are fixed on the roof If you do the latter you must have sufficient clearance for the turn up tool at the top end of the sheets about 50mm Turning up CUSTOM ORB With pliers multi grips or a shifting spanner closed down to approximately 2mm grip the valley corrugations 20mm in from the end of the sheet and turn up as far as possible Figure 10 1 2 Be careful not to tear the sheet Turning up TRIMDEK and SPANDEK Slide the turn up tool onto the end of the sheet as far as it will go Holding the tool against the end of the sheet pull the handle to turn up the tray about 80 Figure 10 1 3 Turning up KLIP LOK You
97. require specifiers and installers to exercise due care in how the products are applied and installed and are subject to final use and installation And owners need to maintain the finished work We invite you to ask about the warranties applicable to your proposed purchase at your supplier of LYSAGHT products Using LYSAGHT Roofing and Walling INTRODUCTION 1 Conditions of use Where we recommend use of third party materials ensure you check the qualities and capabilities of those products with the relevant manufacturer before use Your suggestions Please send your suggestions for improvements to this manual to BlueScope Lysaght Technology Department PO Box 504 Chester Hill NSW 2162 Further information on products and services e www lysaght com e Your supplier of LYSAGHT products e BlueScope Lysaght Information Service on 1800 641 417 2008 9 Edition 2 DESIGN DESIGN PRELIMINARIES PART A DESIGN 2 Design preliminaries 2 1 Product selection When you design steel cladding into your building you have a wide range of profiles from which to choose Whilst roofing and walling obviously have to keep out the weather they also have significant effects on the looks cost and durability of a building If you are unsure about any product feature visit www lysaght com call our information line or seek advice from the relevant specialists Other factors that affect selection are treated in Chapters 2
98. rough cest See Table 10 4 1 2 fasteners per tray self drilling screws with EPDM sealing washer b Pierce fi d through vall See Table 10 4 1 Fastened clip on purlin 2 fasteners per ae self drilling screws a ae with EPDM with sealing washer pierce fixing through vallg Figure 10 4 1 Fixing at end laps Using LYSAGHT Roofing and Walling 10 4 End lapping Because our roofing and walling is manufactured by continuous processes sheet lengths can be supplied up to the limits of transport regulations which are frequently long enough to cover roofs without end lapping the sheets If you contemplate using sheets that are shorter than the full span and overlap them you need to consider e the roof slope because it affects the amount of overlap see Table 10 4 1 e the method of fixing of the cladding to its supports because it affects the maximum length of sheet see Section 10 5 Expansion joints and Table 10 5 2 Table 10 4 1 End laps End lap End lap minimum mm maximum mm Roof slope 200 300 Less than I in 4 15 See End laps in pitches less than 15 degrees later in this section Greater than in 4 15 150 250 Walls 100 200 Fixing methods for end laps There are three methods of fixing cladding at end laps e Pierce fixed through crests Position the lap centrally over the support and the fastening secures both the lap and the cladding Spac
99. s on very steep pitches you should pierce fix through each sheet under the flashing or capping along the top of the sheets 9 1 Installing KLIP LOK roofs Use the same general procedure described in Section 8 1 General installation procedure However at the start of installing KLIP LOK 406 KLIP LOK 700 or KLIP LOK MAXIMA a row of clips is fixed to the supports before the first sheet is located over them and locked in position Clips For KLIP LOK MAXIMA use MAXIMA clips KLIP LOK 700HS use 700HS clips For KLIP LOK 406 use KL65 clips The orientation of the clips is important because they are not symmetrical Figure 9 1 1 The fixing holes are pre punched On KL65 and KL75 clips you can use the dimples to locate other fasteners where a fastener breaks or a timber support splits Using LYSAGHT Roofing and Walling INSTALLATION CONCEALED FIXING 35 ia Shortened Ist clip N Fixing screw through each tower 700 HS fixing clip for KLIP LOK 700 or KLIP LOK MAXIMA Fixing hole Dimples for KL65 fixing clip for KLIP LOK 406 Figure 9 1 1 KLIP LOK clips 2008 9 Edition 36 INSTALLATION CONCEALED FIXING cut here Discard me L 1A gt Le 25 mm Standard flashing Second clip KLIP LOK 700HS Starting method M flashing 14 L LS LS A A f First clip KLIP LOK 700HS Starting method 2 Second clip KLIP LOK 406 KL65 clips shown
100. s in controlling heat include e the orientation of the building relative to the sun e external shading from trees or other buildings e design of the building especially ventilation and sealing at doors and windows e the colours and surface gloss of the cladding The first three factors are outside the scope of this book Heat is absorbed into a sheet on one side and some of that absorbed heat is re radiated from the other side Figure 5 1 1 e Light coloured or shiny surfaces don t absorb much heat and they radiate little e Dark coloured or dull surfaces absorb a lot of heat and they radiate a lot This doesn t stop you using darker claddings because you can use reflective foil laminate under the cladding 2008 9 Edition DESIGN INSULATION AND SKYLIGHTING 21 Table 5 1 1 Approximate thermal transmission for comparisons only Roofing with 50 mm Roofing with insulation blanket amp Roofing only reflective foil laminate reflective foil laminate Heat Heat Heat Heat Heat Heat radiated from radiated radiated from radiated radiated from radiated underside convected underside convected underside convected 5 W m Wim Wim Wim Wim Assumptions Wim m m m m m solar radiation 850 W m ZINCALUME 25 40 2 0 9 0 2 0 7 0 average Australian summer ambient temperature 30 C COLORBOND wind velocity over roof 3 m s Classic Cream 35 5 41 9 1 4 5 8 1 0 4 2 still air under the roof system
101. se of the plastic in an environmentally responsible manner Using LYSAGHT Roofing and Walling 7 9 Sealants Recommended sealants Neutral cure silicone sealants have been successfully used with the range of steel finishes on our roofing and walling and on flashings cappings and gutters made from the same materials as the cladding Neutral cure silicone sealants e have good adhesion to the clean surface of all our roofing and walling e are water resistant and non corrosive e are resistant to extremes of heat and cold while retaining good flexibility e provide high resistance to ultra violet rays sunlight and e have a long service life It is important that only neutral cure silicone be used with sheet steel Other silicone sealants often have a vinegar or ammonia smell and give off aggressive by products during curing which are detrimental to sheet steel If in doubt look for a message on the sealant package like Suitable for use with galvanised and ZINCALUME steel products Cleaning surfaces For effective bonding all surfaces must be clean dry and free from contaminants such as old sealant or oil Mineral turpentine is suitable for cleaning the surfaces but care must be taken to completely remove all residual solvent with a clean dry cloth White spirits is an alternative Sealant must be applied on the same day as the surface is cleaned Joint strength Seams sealed with sealant should be mechani
102. sive or solvent cleaners like turps petrol kerosene and paint thinners on COLORBOND steel surfaces For advice on grease oil or deposits not removed by soap or detergent contact our Information Service Using LYSAGHT Roofing and Walling 2008 9 Edition Installing pierce fixed cladding Pierce fixing is the method of fixing sheets using fasteners which pass through the sheet This is different from the alternative method called concealed fixing Chapter 9 The method of fixing you use is determined by the cladding profile you are using You can place screws through the crests or in the valleys however to maximise watertightness always place roof screws through the crests For walling you may fix through either the crest or valley Figure 8 1 Always drive the screws perpendicular to the cladding and in the centre of the corrugation or rib The following procedures are described for roofs but the same general principles apply to walls 8 1 General installation procedure Check flatness slope and overhang Before starting work ensure that e the supports for your cladding are truly in the same plane e the minimum roof slopes conform to Section 2 5 Low roof pitches and e the overhangs of sheets from the top and bottom supports don t exceed those in Table 2 3 1 whilst also overhanging at least 50mm into gutters Make any necessary adjustments before you start laying sheets because they will be difficult or impo
103. ssible to rectify later Orient sheets before lifting For maximum weather tightness start laying sheets from the end of the building that will be in the lee of the worst anticipated or prevailing weather Figure 8 1 1 It is much easier and safer to turn sheets on the ground than up on the roof Before lifting sheets on to the roof check that they are the correct way up and the overlapping side is towards the edge of the roof from which installation will start Place bundles of sheets over or near firm supports not at mid span of roof members Using LYSAGHT Roofing and Walling INSTALLATION PIERCE FIXING 31 Crest fixing Valley fixing roofs amp walls walls only Figure 8 1 Crest and valley fixing Sheet 3 ed Sheet 2 Sheet Prevailing weather gt Direction of laying Figure 8 1 1 Lay sheets towards prevailing weather 2008 9 Edition 32 INSTALLATION PIERCE FIXING Fixed sheets Paring Early checks Later checks Start Early checks Later checks Figure 8 1 2 Check alignment occasionally Using LYSAGHT Roofing and Walling Finish Position first sheet With particular care position the first sheet before fixing to ensure that it is correctly located in relation to other parts of the building Check that the sheet e is aligned with the end wall or its barge or fascia bearing in mind the type of flashing or capping treatment
104. ter end of the sheet to the fascia or purlin position the sheet so that it overhangs the desired amount into the gutter When setting the first sheet remember that it is important you keep the gutter end of all sheets at a constant distance from the edge of the gutter or fascia 3 Bend the tab of all clips over the rib Figure 10 4 3 2008 9 Edition Fix the next and subsequent clips and sheets 1 Using the rib closing tool flatten the rib of the first previous sheet at each purlin where the top fixing clips will fit Figure 9 4 4 2 Place top fixing clips over each flattened rib and fix to the purlins Figure 9 4 5 With a felt tipped pen make a small mark in the pan to enable you to locate the clips in the later locking operation with the button punch Figure 9 4 6 3 Place the next sheet over the edge of the preceding sheet Figure 9 4 5 Accurately position the sheet so that it overhangs the desired amount into the gutter It is important that you keep the gutter end of all sheets at a constant distance from the edge of the gutter or fascia 4 Fully engage the sheet with the clips using foot pressure on the ribs over each clip You can do this by walking along the full length of the sheet with one foot in the tray next to the overlapping rib and the other foot applying pressure to the top of the interlocking ribs at regular intervals For walling applications use a rubber mallet instead of the weight on your
105. to be used and e aligns correctly at its ends in relation to the gutter and ridge or parapet or transverse wall Roof sheets should overhang at least 50mm into gutters Fix the sheet as described later in this chapter Position other sheets After fixing the first sheet in position align the following sheets using e the long edge of the previous sheet and e a measurement from the end of the sheet to the fascia or purlin at the gutter It is important that you keep the gutter end of all sheets in a straight line Fix the sheet by either e fixing each sheet completely before laying the next or e fix the sheet sufficiently to ensure it can t move complete laying all sheets then return to place all the intermediate fasteners later Check alignment occasionally Occasionally check that the sheets are still parallel with the first sheet by taking two measurements across the width of the fixed cladding Figure 8 1 2 At about half way through the job perform a similar check but take the measurements from the finishing line to aim for the final sheet to be parallel with the end of the roof If the measurements are not close enough lay subsequent sheets very slightly out of parallel to gradually correct the error by e properly align and fix a lap then e fix the other edge of the sheet placing the fasteners slightly closer or further from where they would normally be if there was no error 2008 9 Edition INSTALLATI
106. types 25 maximum roof lengths 8 Using LYSAGHT Roofing and Walling rainfall intensities 25 lengths 3 roofing drainage 8 transportation 4 pitches 3 tapered 19 walking on 27 wind forces 3 rust stains avoiding 28 warn other contractors 28 S safety 27 guardrails 27 lifting roofing 31 walking on roofs 27 screws See also fasteners setting tightness 10 sealant use 29 sealants 28 sealing washers 9 selection of products 2 silicone sealant See sealants skylighting 23 solvents 30 spacing definitions 6 SPANDEK overlaps 47 specifications for profiles tables 6 materials 2 storage of products 27 stripable coatings 28 support spacings 3 T tapered roofing 19 technical bulletins 62 testing performance 3 thermal transmission see heat control 20 translucent cladding See skylighting transportation 4 trims see flashings walls 59 turn downs 46 turn ups 44 V valley fixing 34 WwW walking on roofs 27 wall flashings 59 walls design 2 warranties 1 washers sealing 9 wind forces 3 Z ZINCALUME 2 2008 9 Edition Disclaimer warranties and limitation of liability This publication is intended to be an aid for all trades and professionals involved with specifying and installing Lysaght products and not to be a substitute for professional judgement Terms and conditions of sale available at local BlueScope Lysaght sales offices Except to the extent to which liability may not lawfully be excluded or limite

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