Thin-R TR/BGM BBA Cert PDF
Contents
1. K to 0 027 WW m K depending on thickness see section 5 Condensation risk the product can contribute to limiting the risk of surface condensation see section 6 Strength and stability when installed on suitable substrates using appropriate adhesive and or mechanical fixing methods the product can adequately transfer maintenance traffic loads and wind loads to the roof deck see section 7 Behaviour in relation to fire the overall fire rating of any roof containing the product will depend on the type of deck and the nature of the roof waterproof covering see section 8 Durability the product when used as thermal insulation in the roof system described in this Certificate will have a life at least as long as that of a roof waterproofing covering see section 10 The BBA has awarded this Agr ment Certificate to the company named above for the product described herein This product has been assessed by the BBA as being fit for its intended use provided it is installed used and maintained as set out in this Certificate On behalf of the British Board of Agr ment o a jrid a Date of First issue 15 November 2011 Sean Moriarty Greg Cooper Head of Approvals Physics Chief Executive The BBA is a UKAS accredited certification body Number 113 The schedule of the current scope of accreditation for product certification is available in pdf format via the UKAS link on the BBA website at www bbacerts co uk Rea2. VCL 1 5 mm waterproofing membrane 4 Page 4 of 12 5 3 The product can contribute to maintaining continuity o Table 3 Example U values for constructions with stainless steel fixings Insulation thickness U value mm W m K Concrete N3 Timber 24 Metall 165 155 0 15 155 145 60 0 16 140 130 40 0 18 125 120 25 0 20 105 95 05 0 25 1 2 3 4 5 Table 4 Exam Nearest available thickness Includes 5 55 stainless steel insulation fixings per m with a 3 55 stainless steel waterproofing f ixings per m with a 4 8 mm cross sectional diameter 150 mm concrete decking 1 33 W m K1 VCL 1 5 mm waterproofing membrane 12 5 mm plasterboard 150 mm timber joists 12 5 air cavity 87 5 18 mm plywood decking VCL Metal deck no 5 mm waterproofing membrane included in calculation VCL 1 5 mm waterproofing membrane ple U values for constructions with galvanized steel fixings Insulation thickness U value mm W mr K Concrete 23 Timber 24 Metall 160 145 165 0 18 145 130 145 0 20 120 95 110 0 25 1 2 3 4 5 Nearest available thickness Includes 5 55 galvanized steel insulation fixings per m and 3 55 galvanised steel waterproofing fixings per m with a 4 8 mm cross sectional diameter 150 mm concrete decking 1 33 W m K1 VCL 1 5 mm waterproofing membrane 12 5 mm plasterboard 150 mm timber joists 12 5 air cavity 87 5
3. the NHBC Standards 2011 Chapter 7 1 Section 4 3 3 Roofs should incorporate an effective VCL below the boards Page 3 of 12 3 4 The product is for use with one of the following waterproofing specifications e builtup bitumen felt to BS 8747 2007 laid in accordance with BS 8217 2005 e other bitumen waterproofing systems which are the subject of a current Agr ment Certificate laid in accordance with and within the limitations imposed by that Certificate e mechanically fixed single ply waterproofing membranes such as PVC CSM CPE FPO including TPO EVA PIB and EPDM which are the subject of a current Agr ment Certificate laid in accordance with and within the limitations imposed by that Certificate e mastic asphalt laid in accordance with BS 8218 1998 1 Mineral coated glassfibre facing MG side facing up 3 5 Limited access roofs are defined for the purpose of this Certificate as those roofs subject only to pedestrian traffic for maintenance of the roof covering and cleaning of gutters etc see also section 7 11 3 6 Flat roofs are defined for the purpose of this Certificate as those roofs having a minimum finished fall of 1 80 and a maximum 1 6 as defined in BS 6229 2003 3 7 For design purposes on flat roofs twice the minimum finished fall should be assumed unless a detailed analysis of the roof is available including overall and local deflections direction of falls etc 3 8 Tapered board
4. 18 mm plywood decking VCL 1 5 mm waterproofing membrane Metal deck not included in calculation VCL 1 5 mm waterproofing membrane f thermal insulation at junctions between elements and openings For Accredited Construction Details the corresponding psi values in BRE Information Paper IP1 06 Assessing the effects of thermal bridging at junctions and around openings Table 3 may be used in carbon emission calculations in Scotland and Northern Ireland Detailed guidance for other junctions and on limiting heat loss by air infiltration can be found in England and Wales Approved Documents to Part L and for new thermal elements to existing buildings Accredited Construction Details version 1 0 See also SAP 2009 Appendix K and the iSBEM User Manual for new build Scotland Accredited Construction Details Scotland Northern Ireland Accredited Construction Details version 1 0 6 Condensation risk Interstitial condensation accordance with BS 5250 2002 Section 8 4 and Appendix D and BRE Report BR 262 2002 Thermal 4 6 1 Roofs will adequately limit the risk of interstitial condensation when they are designed and constructed in insulation avoiding risks in England and Wales 6 2 For the purposes of assessing the risk of interstitial condensation the insulation core vapour resistivity may be taken as approximately 344 MN s g m and a resistance value of 258 MN s g m for the bitumen facing 6 3 To minim
5. 1991 1 4 2005 Eurocode 1 Actions on structures General actions Wind actions BS EN ISO 6946 2007 Building components and building elements Thermal resistance and thermal transmittance Calculation method Page 11 of 12 Conditions of Certification 15 Conditions 15 1 This Certificate e relates only to the product system that is named and described on the front page e is issued only to the company firm organisation or person named on the front page no other company firm organisation or person may hold or claim that this Certificate has been issued to them e is valid only within the UK e has to be read considered and used as a whole document it may be misleading and will be incomplete to be selective e is copyright of the BBA e is subject to English Law 15 2 Publications documents specifications legislation regulations standards and the like referenced in this Certificate are those that were current and or deemed relevant by the BBA at the date of issue or reissue of this Certificate 15 3 This Certificate will remain valid for an unlimited period provided that the product system and its manufacture and or fabrication including all related and relevant parts and processes thereof e are maintained at or above the levels which have been assessed and found to be satisfactory by the BBA e continue to be checked as and when deemed appropriate by the BBA under arrangements that it will determine e ar
6. Booklet E section 4 If on flat roofs the waterproof covering is protected by one of the surface finishes defined in Table 4 6 of Technical Booklet E the roof is deemed to be of designation AA 8 4 The designation of other specifications eg when used on combustible substrates should be confirmed by England and Wales test or assessment in accordance with Clause 6 of Appendix A of Approved Document B volumes and 2 Scotland test to conform to clauses 2 C and 2 F2 1 Technical Handbook Domestic 2 Technical Handbook Non Domestic Northern Ireland test or assessment by a UKAS accredited laboratory or an independent consultant with appropriate experience 9 Maintenance The product once installed does not require any regular maintenance and has suitable durability provided the roof waterproof layers are inspected and maintained at regular intervals see section 10 therefore maintenance is not required 10 Durability 4S product is rotresistant and durable and will have a life at least as long as that of the roof waterproof gt covering 11 General 1 Xtratherm Thin R Flat Roof Insulation Board XT FR MG BG must be installed in accordance with the Certificate holder s instructions and BS 6229 2003 BS 8217 2005 or the relevant Agr ment Certificate depending on the waterproofing to be applied 2 Care should be taken to ensure the deck is graded to the correct fall is dry clean and free from any proje
7. acting upon the structure 7 8 When adhering is the chosen method for the insulation or waterproofing adhesion between the insulation product and VCL and between the product and overlay must be adequate to resist the effects of wind suction and thermal cycling likely to be experienced under normal conditions In areas where high wind speeds can be expected additional mechanical fixings should be considered and the advice of a suitably qualified Engineer should be sought as to the method of fixing as defined in the relevant clauses of BS 6399 2 1997 and BS EN 1991 1 4 2005 7 9 Roof waterproof covering systems see section 3 4 for suitable types must be applied in accordance with the relevant Agr ment Certificates or manufacturers guidance 7 10 For design purposes the product may be assumed to have an allowable compressive strength of 150 kPa at 10 compression 7 11 The product has not been assessed for use with permanent distributed or concentrated loads such as air conditioning units mechanical plants water tanks etc Such loads should be supported directly on the roof construction The product is not suitable when permanent roof access is required 7 12 When profiled decking is used the product will need to span across the ribs Maximum permissible spans between ribs for product thicknesses are shown in Table 5 Table 5 Maximum clear span Maximum clear span Minimum roofboard mm thickn
8. restate the requirements of the Health and Safety at Work etc Act 1974 or of any other statutory common law or other duty which may exist at the date of issue or reissue of this Certificate nor is conformity with such information to be taken as satistying the requirements of the 1974 Act or of any statutory common law or other duty of care British Board of Agr ment tel 01923 665300 Bucknalls Lane fax 01923 665301 Garston Watford email mail bba star co uk Herts WWD25 BA website www bbacerts co uk Page 12 of 12
9. A_N Xtratherm UK Ltd APBROVAL Park Road INSPECTION Holmewood Industrial Park a Holmewood TECHNICAL APPROVALS FOR CONSTRUCTION Chesterfield ae le ie a ce Agr ment Certificate Tel 0371 Fax O37 1 email info xtratherm com 1 1 4878 website www xtratherm com Product Sheet 2 XTRATHERM THIN R INSULATION XTRATHERM THIN R FLAT ROOF INSULATION BOARD XT FR MG BG This Certificate relates to Xtratherm Thin R Flat Roof Insulation Board XT FRMG BG a rigid thermoset polyisocyanurate board with a mineral coated glassfibre facing on one side and a composite bitumen glassfibre facing on the other face for use as a thermal insulation layer and to create or improve falls on limited access concrete metal or timber flat roof decks lt is for use in conjunction with a vapour control layer and adhesively bonded or mechanically fixed roof waterproofing membranes in domestic and non domestic buildings AGREMENT CERTIFICATION INCLUDES e factors relating to compliance with Building Regulations where applicable e factors relating to additional non regulatory information where applicable independently verified technical specification assessment criteria and technical investigations design considerations installation guidance regular surveillance of production formal three yearly review KEY FACTORS ASSESSED Thermal performance the product has declared thermal conductivities go 99 value ranging from 0 024 W m
10. ary items used with the product are e waterproofing membrane e vapour control layer VCL e fixings incorporating countersunk washer 2 Delivery and site handling 2 1 The product is delivered to site shrinkwrapped in polythene packs containing a label with the product description and characteristics the manufacturer s name and the BBA identification mark incorporating the number of this Certificate 2 2 It is essential that the product is stored such that it is raised off the ground is inside or under cover on a flat dry level surface in a well ventilated area The product must be protected from rain snow and prolonged exposure to sunlight Boards that have been allowed to get wet should not be used Damaged boards must not be used Nothing should be stored on top of boards 2 3 The product must not be exposed to a naked flame or other ignition sources The product must not be exposed to solvents or other chemicals Assessment and Technical Investigations The following is a summary of the assessment and technical investigations carried out on Xtratherm Flat Roof Insulation Board XT FRMG BG 3 General 3 1 Xtratherm Thin R Flat Roof Insulation Board XT FR MG BG is suitable for use as a thermal insulation layer on concrete timber or metal flat roofs with access limited to maintenance only 3 2 Decks should be designed in accordance with the relevant clauses of either BS 6229 2003 or BS 8217 2005 and where appropriate
11. ate Page 2 of 12 Construction Design and Management Regulations 2007 Construction Design and Management Regulations Northern Ireland 2007 Information in this Certificate may assist the client CDM co ordinator designer and contractors to address their obligations under these Regulations See section 2 Delivery and site handling 2 3 of this Certificate Additional Information NHBC Standards 2011 NHBC accepts the use of Xtratherm Thin R Flat Roof Insulation Board XT FR MG BG when installed and used in accordance with this Certificate in relation to NHBC Standards Chapter 7 1 Flat roofs and balconies Technical Specification 1 Description 1 1 Xtratherm Thin R Flat Roof Insulation Board XT FR MG BG is a rigid thermoset polyisocyanurate insulation board manufactured using CFC HCFC free materials incorporating a mineral coated glasstibre facing on one side and a composite bitumen glassfibre facing on the other face 1 2 The product has the nominal characteristics of Length and width mm 1200 x 600 1200 x 1200 and 2400 x 1200 Thickness mm 50 165 in 5 mm increments Compressive strength at 10 compression kPa 150 Density kg m 30 Edge profile Square rebated 1 3 The product is also available in a tapered version for falls of 1 120 1 80 and 1 60 1200 mm by 1200 mm 1 4 Quality control checks are carried out during the manufacturing process and on the finished product 1 5 Ancill
12. ctions or gaps 3 If the product is tapered and it is to be effective in providing a uniform fall it is essential that the structural deck is true and even Any hollows depressions backfalls found in the roof deck eg must be rectified prior to laying the insulation A For both mechanically and adhesively fixed systems the suitability of the substrate deck to accept an adhesive bond or mechanical fixing must be checked prior to the work commencing 5 The deck to which the VCL is to be applied must be level dry sound and if bonded free from dust and grease and other defects which may impair the bond For adhered systems all deck joints should be taped and where necessary the deck coated with bitumen primer to BS 3416 1991 6 On multi storey buildings or in areas subject to high wind loads additional mechanical fixings may be required and the advice of the Certificate holder should be sought on any limitations of use 7 The mechanical fixing frequency and pattern should be predetermined in accordance with the Certificate holder s instructions and the relevant clauses of BS 6399 2 1997 or BS EN 1991 1 4 2005 Each fixing should incorporate a minimum of 75 mm diameter circular plate countersunk washer or a 75 mm by 75 mm square washer which must not restrain more than one board 1 8 To prevent moisture being trapped on or in the insulation it is essential to e protect the product during la
13. cular plates of at least 75 mm diameter or 75 mm by 75 mm square should be used with each fixing The requirement of additional fixings assessed in accordance with BS 6399 2 1997 or BS EN 1991 1 4 2005 Page 8 of 12 Figure 1 Fixing layout 1200 mm by 600 mm board minimum fixing numbers 50 150 50 1 sof sO O Oo O All dimensions in mm Figure 2 Fixing layout 1200 mm by 1200 mm board minimum fixing numbers 50 150 50 1 sof A O O O I 600 O O 1 jaa 400 All dimensions in mm Page 9 of 12 Figure 3 Fixing layout 2400 mm by 1200 mm board minimum fixing numbers 50 150 50 1 sol O O O O O O I 600 O O O O 1 m 400 All dimensions in mm Figure 4 Fixing layout 1200 mm by 1200 mm tapered board minimum fixing numbers 210 gt T JXl O All dimensions in mm Page 10 of 12 Weatherproofing all systems 12 16 The waterproofing system should be applied above the insulation product in accordance with section 3 4 13 Tests Tests were carried out by the BBA on Xtratherm Thin R Flat Roof Insulation Board XT FR MG and the results assessed to determine e behaviour under variations in temperature unrestrained e behaviour under distributed load and increased temperature e effect of concentrated load on cantilevered parts e bowing under the ef
14. d before installation Mechanical fixings must be checked before installation by carrying out in situ pull out or pullthrough testing to determine the minimum safe working load the fixings can resist The advice of the Certiticate holder should also be sought in respect of suitable mechanical fixings 7 4 The type and number of fixings will depend on the roof construction and location the Certificate holder s advice should be sought in this respect The Certificate holder recommends a minimum number of fixings per board size see section 12 15 7 5 All design analysis must be in accordance with British or European Standards relevant to the construction The requirement for fixings to suit the wind uplift requirements for the particular site should be assessed in accordance with BS 6399 2 1997 or BS EN 1991 1 4 2005 All calculations should be approved by a competent person 7 6 Each fixing must incorporate a head or washer which is a minimum of 75 mm diameter if round or 75 mm by 75 mm if square Fixings installed along the edges or at corners of the product should be installed between 50 mm to 150 mm from the board edge 210 mm for tapered boards 7 7 For adhesive application of the insulation product the substrate must be free of dust dry and installation should be in accordance with the instructions of the adhesive manufacturer The surface of the substrate must have sufficient cohesive strength fo resist the calculated wind load
15. ders are advised to check the validity and latest issue number of this Agr ment Certificate by either referring to the BBA website or contacting the BBA direct British Board of Agr ment tel 01923 665300 Bucknalls Lane fax 01923 665301 Garston Watford email mail bba star co uk Herts WWD25 BA website www bbacerts co uk Page of 12 Regulations In the opinion of the BBA Xtratherm Thin R Flat Roof Insulation Board XT FR MG BG if used in accordance with the provisions of this Certificate will meet or contribute to meeting the relevant requirements of the following Building Regulations 4a The Building Regulations 2010 England and Wales Requirement Al Loading Comment The product is acceptable See section 7 1 of this Certificate Requirement B4 2 External fire spread Comment Roofs incorporating the product can meet this Requirement See section 8 2 of this Certificate Requirement C2 c Resistance to moisture Comment The product will contribute to a roof meeting this Requirement See sections 6 1 and 6 4 of this Certificate Requirement L1 a i Conservation of fuel and power Comment The product can meet or contribute to a roof meeting this Requirement See sections 5 2 and 5 3 of this Certificate Requirement Regulation 7 Materials and workmanship Comment The product is an acceptable material See section 10 and the Installation part of this Certificate r The Building Scotland Regula
16. e reviewed by the BBA as and when it considers appropriate 15 4 The BBA has used due skill care and diligence in preparing this Certificate but no warranty is provided 15 5 In issuing this Certificate the BBA is not responsible and is excluded from any liability to any company firm organisation or person for any matters arising directly or indirectly from e the presence or absence of any patent intellectual property or similar rights subsisting in the product system or any other product system e the right of the Certificate holder to manufacture supply install maintain or market the product system e individual installations of the product system including their nature design methods performance workmanship and maintenance e any works and constructions in which the product system is installed including their nature design methods performance workmanship and maintenance e any loss or damage including personal injury howsoever caused by the product system including its manufacture supply installation use maintenance and removal e any claims by the manufacturer relating to CE marking 15 6 Any information relating to the manufacture supply installation use maintenance and removal of this product system which is contained or referred to in this Certificate is the minimum required to be met when the product system is manufactured supplied installed used maintained and removed It does not purport in any way to
17. ess mm x75 25 gt 75 lt 100 30 gt 100 lt 125 35 gt 125 lt 150 40 gt 150 lt 175 45 gt IZ5 lt 200 50 gt 200 lt 225 55 gt 225 lt 250 60 7 13 When maintenance is required to the roof waterproofing protective boarding should be laid over the roof surface to avoid concentrations of load 8 Behaviour in relation to fire 8 1 The fire rating of any roof containing the product will depend on the type of deck and the nature of the roof waterproof covering 8 2 When tested in accordance with BS 476 3 2004 a fully bonded system comprising 0 7 mm thick profiled metal deck a layer of a polythene VCL a 100 mm thick board with the composite bitumen glassfibre facer facing up bitumen base layer reinforced bitumen underlay and a bitumen cap sheet with mineral chippings achieved an EXT F AA rating Low vulnerability in Scotland rating and is acceptable less than 6 m from a relevant boundary Page 6 of 12 8 3 The designation of the roof covering must meet or satisfy the requirements of the national Building Regulations thus England and Wales Approved Document B sections 10 and 14 of volumes 1 and 2 respectively Notional designations of some common roof coverings are given in Appendix A Table A5 of the Approved Document B volumes and 2 Scotland Mandatory Standards 2 8 clause 2 8 1 1 Technical Handbook Domestic 2 Technical Handbook Non Domestic Northern Ireland Technical
18. f sustainability as defined in this Standard In addition the product can contribute to a construction meeting a higher level of sustainability as defined in this Standard with reference to clauses 7 1 4 2 Aspect 1 2 7 1 62 Aspect 112 and 7 1 72 Aspect 11 See section 5 2 of this Certificate Regulation 12 Building standards conversions Comment Comments made in relation to the product under Regulation 9 Standards 1 to 6 also apply to this Regulation with reference to clause O 12 102 and Schedule 602 1 Technical Handbook Domestic 2 Technical Handbook Non Domestic The Building Regulations Northern Ireland 2000 as amended 5 Regulation B2 Fitness of materials and workmanship Comment The product is acceptable See section 10 and the Installation section of this Certificate Regulation C5 Condensation Comment The product will contribute to a roof meeting this Regulation See section 6 1 of this Certificate Regulation D1 Stability Comment The product is acceptable See section 7 1 of this Certificate Regulation E5 b External fire spread Comment Roofs incorporating the product can meet this Regulation See section 8 2 of this Certificate Regulation F2 a i Conservation measures Regulation F3 2 Target carbon dioxide Emissions Rate Comment Roofs incorporating the product can satisfy or contribute to satisfying this Regulation See sections 5 2 and 5 3 of this Certific
19. fect of a thermal gradient e behaviour on exposure to moisture e tensile strength perpendicular to faces e wind uplift e density e compressive strength e dimensional stability in built up roofing Bitumen pour test e dimensional stability under specified temperature and humidity conditions 14 Investigations 14 1 An assessment was made of the results of test data relating to e dimensional stability with temperature e effect of concentrated load under a free span e fire rating hermal conductivity fresh and aged s 14 2 An assessment of the risk of interstitial condensation was made 14 3 An assessment was made of typical constructions which achieve the design U values Bibliography BS 476 3 2004 Fire tests on building materials and structures Classification and method of test for external fire exposure to roofs BS 3416 1991 Specification for bitumen based coatings for cold application suitable for use in contact with potable water BS 5250 2002 Code of practice for control of condensation in buildings BS 6229 2003 Flat roofs with continuously supported coverings Code of practice BS 6399 2 1997 Loading for buildings Code of practice for wind loads BS 8217 2005 Reinforced bitumen membranes for roofing Code of practice BS 8218 1998 Code of practice for mastic asphalt roofing BS 8747 2007 Reinforced bitumen membranes RBMs for roofing Guide to selection and specification BS EN
20. ise moisture entering the roof an effective VCL such as 0 25 mm minimum thickness polyethylene should be used with sealed and lapped joints and be turned up around the insulation and bonded to the weatherproofing finish Surface condensation not exceed 0 35 W m K at any point and the junctions with other elements are designed in accordance with Roofs will adequately limit the risk of surface condensation when the thermal transmittance U value does section 5 3 not exceed 1 2 Wm K at any point Guidance may be obtained from BS 5250 2002 Section 8 and BRE R 6 5 Roofs will adequately limit the risk of surface condensation when the thermal transmittance U value does Report BR 262 2002 Page 5 of 12 7 Strength and stability 7 1 When installed on suitable flat roof decks using appropriate fixings and or adhesive the product can adequately transfer maintenance traffic loads and negative and positive suction and pressure wind loads to the roof deck 7 2 The roof construction or immediate substrate to which the product is fixed must be structurally sound and have sufficient strength and stability to resist all dead imposed and wind loads It must also have adequate resistance to the pull out forces created by the wind forces acting on the specified fixings used 7 3 The suitability of the roof construction and in particular the immediate substrate to accept the adhesive bond and mechanical fixing must be checke
21. rdance with BS 8217 2005 2 4 The VCL should be turned up around the insulation and sealed to the waterproof finish at all edges and penetrations such as roof lights Advice may be sought from the Certificate holder 2 5 Hot bitumen adhesive or a polyurethane adhesive or a suitable solventbased adhesive is applied over the VCL and the roofing boards are fully embedded into it in a brick bonded pattern 1 Mineral coated glassfibre facing MG side facing down 12 6 When using non bituminous waterproofing systems or adhesives all board joints and edges should be sealed with 50 mm wide aluminium foil adhesive tape prior to the application of the adhesive system and roof waterproofing membrane Concrete decks 2 7 Before applying the VCL an appropriate levelling screed should be applied where necessary and if adhering the VCL and insulation boards the whole deck treated with a suitable primer The advice of the Certificate holder should also be sought in respect of a suitable primer 2 8 For adhered systems the VCL is fully bonded with hot bitumen a polyurethane adhesive or a suitable solvent based adhesive and the laps sealed and the boards applied in the manner described for timber decks see section 2 4 to 12 6 Metal decks 2 9 If adhering the VCL and insulation product the deck should be prepared and treated with a suitable primer before applying the VCL The advice of the Certificate holder should also be
22. s may be used where appropriate to achieve the minimum finished falls required 4 Practicability of installation The product is designed to be installed by a competent general builder or a contractor experienced with this type of product 5 Thermal performance 5 1 Calculations of thermal transmittance U value should be carried out in accordance with BS EN ISO 6946 2007 and BRE Report BR 443 2006 Conventions for U value calculations using the declared thermal conductivity No0790 Value given in Table 1 Table 1 Thermal conductivity Xoo 90 values Insulation thickness Thermal conductivity mm W m K lt 80 0 027 80 to 120 0 025 gt 120 0 024 53m lixings and the insulating value of other roof components layers Example U values of roofs incorporating the gt The U value of a completed roof will depend on the thickness of insulation used the number and type of product are shown in Tables 2 to 4 Table 2 Example U values for a fully adhered system Insulation thickness U value mm W m K Concrete Timber Metala 150 145 155 0 15 145 135 145 0 16 125 125 130 0 18 120 110 120 0 20 95 90 95 0 25 1 Nearest available thickness 2 150 mm concrete decking 1 33 W m K VCL 1 5 mm waterproofing membrane 3 12 5 mm plasterboard 150 mm timber joists 12 5 air cavity 87 5 18 mm plywood decking VCL 1 5 mm waterproofing membrane Metal deck not included in calculation
23. sought in respect of a suitable primer 2 10 For adhered systems a reinforced VCL is fully bonded using a polyurethane adhesive or a suitable solvent based adhesive to the metal deck and the product is applied in the manner described for timber decks see section 2 5 and 12 6 2 11 The product is laid with the long edges at right angles to the ribs and all board ends must be fully supported on a rib 2 12 The thickness of the roof board used depends on the width of the rib openings of the metal deck as indicated in Table 6 section 7 12 Mechanical fixings 12 13 The product can be secured to concrete metal and timber decks by means of mechanical fixings 12 14 A 0 25 mm thick polythene VCL should be laid with 150 mm sealed laps The VCL should be turned up around the insulation and sealed to the waterproof finish at all edges and penetrations such as roof lights Advice should be sought from the Certificate holder 12 15 The product is laid over the VCL in a brick bonded pattern On profiled metal decks the product is secured to the deck with a minimum of four or six or eleven mechanical fixings placed within the individual board area 1200 mm by 600 mm 1200 mm by 1200 mm and 2400 mm by 1200 mm respectively sited between 50 mm and 150 mm from all edges see Figures 1 to 3 A minimum of six fixings per 1200 mm by 1200 mm tapered boards are recommended sited 210 mm from all edges see Figure 4 Countersunk washers with cir
24. tions 2004 as amended 5 Regulation 8 1 Fitness and durability of materials and workmanship Comment The product can contribute to a construction satisfying this Regulation See section 10 and the Installation part of this Certificate Regulation 9 Building Standards construction Standard ial Structure Comment The product is acceptable with reference to clauses 1 1 1012 1 1 2012 and 1 1 3021 See section 7 1 of this Certificate Standard 2 8 Spread from neighbouring buildings Comment Roofs incorporating the product can meet this Standard with reference to clauses 2 8 1021 See section 8 2 of this Certificate Standard SEIS Condensation Comment The product will contribute to a roof meeting this Standard with reference to clauses 3 15 12 3 15 3102 3 15 4013 3 15 52 and 3 15 6021 See sections 6 1 and 6 5 of this Certificate Standard 6 1 b Carbon dioxide emissions Standard ow Building insulation envelope Comment The product can contribute to satistying the requirements of these Standards with reference to clauses or peie Gr 22 6 1 ell 2 Ne G20 GZA CDS Ze OAM ASME ODE 6 2 1002 6 2 1 12 6 2 1212 and 6 2 1 3 21 See sections 5 2 and 5 3 of this Certificate Standard 7 a b Statement of sustainability Comment The product can contribute to meeting the relevant Requirements of Regulation 9 Standards 1 to 6 and therefore will contribute to a construction meeting a bronze level o
25. ying before the application of the roof waterproofing or to lay the roof covering at the same time as laying the product However if the product is accidentally wetted it must not be used e the product should be installed only when the ambient temperature is above 5 C to prevent condensation 11 9 The product can be cut with a sharp knife or fine toothed saw to fit around projections through the roof 11 10 The product is for use with the waterproofing membranes specified in section 3 4 that are laid in accordance with the relevant British Standard or subject of a current Agr ment Certificate laid in accordance with and within the limitations imposed by that Certificate 11 11 Once installed access to the roof should be restricted in accordance with section 3 5 Page 7 of 12 12 Procedure General 12 1 The number of mechanical fixings required to fix the product will vary depending on the geographical location of the building the topographical data and height and width of the roof concerned etc 12 2 The requirements for an additional number of fixings above those specified in section 12 14 should be assessed in accordance with BS 6399 2 1997 or BS EN 1991 1 4 2005 Timber decks eg tongue and groove boards plywood 2 3 AVCLis nailed to the deck in accordance with BS 8217 2005 Laps of 150 mm are sealed using the appropriate grade of bitumen a polyurethane adhesive or a suitable solvent based adhesive in acco
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