Dow Chemical Company Limited DOW CHEMICAL ROOF
Contents
1. Figure 5 Parapet upstand detail gravel finish apron flashing Roofmate LG alga eice ee ballast Roofmate MK Greyfoam SLA Inverted Roof Insulation waterproof layer e concrete slab 15 2 It is essential to establish that the root waterproofing has been installed correctly and that it is weathertight Every joint between sheets flashing and other details must be checked to ensure that the roof covering is suitable for an inverted roof specification 15 3 Singlelayer roofing must be the subject of very close scrutiny and the inspection must include an examination for perforation and for the likelihood of subsequent perforation from beneath by for example uneven decks and protruding nail heads When a single layer polymeric looselaid waterproofing membrane is used a cushion layer should be interposed between it and the roof deck 15 4 The root waterproofing must be clean and tree from any extraneous matter 15 5 When the product is to be placed over a looselaid root covering it should be installed and ballasted as soon as possible to protect the covering trom the effects of wind uplift See also sections 4 11 and 4 12 of this Certificate 15 6 Installers of the product must take care not to damage the roof waterproofing particularly in the case of thin single layer materials which may be easily damaged 15 7 The product and Roofmate MK membrane are laid in accordance with the Certificate holder s2. 7 1 602 Aspects 12 and 20 and 7 1 7012 Aspect 10121 See section 6 1 of this Certificate 1 Technical Handbook Domestic 2 Technical Handbook Non Domestic 5 fA The Building Regulations Northern Ireland 2012 Regulation 23 Fitness of materials and workmanship Comment The product is acceptable See sections 13 1 and 13 2 and the Installation part of this Certificate Regulation 28 b Resistance to moisture and weather Regulation 29 Condensation Comment The product can contribute to satisfying these Regulations See section 7 5 of this Certificate Regulation 39 a i Conservation measures Regulation 40 2 Target carbon dioxide emission rate Comment The product can contribute to satisfying these Regulations See sections 6 1 and 6 3 of this Certificate 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 sections l Description 1 2 and 1 3 3 Delivery and site handling 3 4 and 14 Installation 14 2 of this Certificate Additional Information NHBC Standards 2014 NHBC accepts the use of Greyfoam SL A Inverted Roof Insulation when installed and used in accordance with this Certificate in relation to NHBC Standards Chapter 7 1 Flat roofs and balconies CE marking The Cer
3. Comment The product is acceptable See sections 13 1 and 13 2 and the Installation part of this Certificate Regulation 26 CO emission rates for new buildings Regulation 26A Fabric energy efficiency rates for new dwellings applicable to England only Comment The product can contribute to satisfying these Regulations See sections 6 1 and 6 3 of this Certificate 5 k The Building Scotland Regulations 2004 as amended Regulation 8 1 Durability Workmanship and Fitness of materials Comment The product is acceptable See sections 13 1 and 13 2 and the Installation part of this Certificate Regulation 9 Building standards applicable to construction Standard Cals Condensation Comment The product can contribute to satistying this Standard See sections 7 4 and 7 5 of this Certificate Standard 6 1 b Carbon dioxide emissions Standard ow Building insulation envelope Comment The product can contribute to satistying these Standards See sections 6 1 and 6 3 of this Certificate Standard 7 a b Statement of sustainability Comment The product can contribute to satisfying the relevant Requirements of Regulation 9 Standards to 6 and therefore will contribute to a construction meeting a bronze level of 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 42 Aspects 1012 and 201
4. Head of Approvals Claire Curtis Thomas Energy and Ventilation 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 Readers 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 e O oa l Watford email mail bba star co uk Herts VVD25 OBA website www bbacerts co uk Page 1 of 12 Regulations In the opinion of the BBA Greyfoam SL A Inverted Roof Insulation if installed used and maintained in accordance with this Certificate can contribute to satisfying the relevant requirements of the following Building Regulations the presence of a UK map indicates that the subject is related to the Building Regulations in the region or regions of the UK depicted gt The Building Regulations 2010 England and Wales as amended 5 Requirement C2 b Resistance to moisture Comment The product can contribute to satisfying this Requirement See sections 7 3 and 7 5 of this Certificate Requirement L1 a i Conservation of fuel and power Comment The product can contribute to satistying this Requirement See sections 6 1 and 6 3 of this Certificate Regulation 7 Materials and workmanship
5. The Rootmate Mink System comprises Greyfoam SLA insulation and Rootmate MK a non woven polyethylene geotextile which is used as a filter layer and water control layer between the insulation and the ballast layer The nominal characteristics of Rootmate MK are shown in Table 2 Table 2 Nominal Characteristics of Roofmate MK Nominal characteristics Length m 100 Width m 3 Water vapour resistance MN s g 0 17 Head of water test 1 0 m no penetration Weight g m 60 1 4 A range of accessories outside the scope of this Certificate include e isolating sheet e cushion layer e rainwater outlet grilles e duaHevel rainwater outlets e tlashings and skirtings e paving ballast e low fines gravel ballast 2 Manufacture 2 1 Greytoam SL A inverted roof insulation boards are manufactured by a continuous extrusion process allowing a skin to form on the surfaces Boards are then cut to size and rebates formed 2 2 As part of the assessment and ongoing surveillance of product quality the BBA has e agreed with the Certificate holder manutacturer the quality control procedures and product testing to be undertaken e assessed and agreed the quality control operated over batches of incoming materials e monitored the production process and verified that it is in accordance with the documented process e evaluated the process for management of noncontormities e checked that equipment has been properly tested and calibrated e undertak
6. as thermal insulation in the inverted root concept above the root waterproofing on limited access flat or zero pitch roots of domestic and non domestic buildings The system is protected from wind uplift UV degradation and maintenance foot traffic by paving or a gravel ballast layer Page 4 of 12 4 2 The insulation product can be covered by the Rootmate MK membrane to form the Rootmate MinK system which acts as a filter layer preventing fines and other debris trom passing through It also acts as a water flow reducing layer to minimise the flowing of cold rainwater between the insulation and the roof waterproofing with consequent heat loss and complementary increase in insulation thickness 4 3 For the purpose of this Certificate e flat roots are defined as those roots having either a finished fall between 1 80 and 1 6 and zero pitch with finished falls from O to 1 80 For design purposes on sloping flat roofs twice the minimum finished fall should be assumed unless a detailed analysis of the root is available including overall and local deflection direction of falls etc see also BBA Information Bulletin No 4 e limited access roofs are defined as those roots subject only to pedestrian traffic for maintenance 4 4 Concrete metal or timber roofs should be designed in accordance with relevant provisions of BS 6229 2003 BS 8217 2005 BS 8218 1998 in particular to accommodate the weight of the ballast layer 4 5 Decks should be cov
7. instructions and sections 14 2 to 14 4 of this Certificate Figure 6 Greyfoam SI A used to upgrade existing insulation gravel 16 32 mm nominal size Roofmate MK 7 CI BX RQ OL eo d CIP I DAA EN we A S d fs j h P al Le vier Cre yr er Greytfoam SLA Inverted Root Insulation 1 waterproofing a ra if F f membrane Ar a J See nea ae ae ie Pa J 4 old insulation deck Page 10 of 12 15 8 The gravel loading specitication is used on roots in sheltered regions or low to medium rise buildings up to 10 storeys 25 m with a single row of paving laid around the root periphery WVhen laid in moderate exposure zones or on buildings of up to 15 storeys 37 5 m the width of paving should be determined by reference to BS 6399 2 1997 and BRE Digest 295 1985 Where there is a risk of wind scour and or possible dislodgement of the ballast BRE Digest 311 1986 should be consulted 16 Tests An examination was made of the results of test data in respect of BS EN 13164 2008 Section 4 2 and relevant parts of section 4 3 and the ETAG 031 2010 and the drainage factor F for a test roof incorporating the Rootmate MK membrane for both flat roof and zero pitch conditions 17 Investigations 17 1 Assessments were made in respect of e production quality control Greytoam SLA e practicability of installation e example roof U values e risk of condensation e resistance to wind uplift 17 2 The manufacturin
8. 1 2008 Quality management systems Requirements BS EN ISO 10456 2007 Building materials and products Hygrothermal properties Tabulated design values and procedures for determining declared and design thermal values BBA Information Bulletin No 4 Inverted roots Drainage and U value corrections BRE Digest 295 1985 Stability under wind load of loose laid external roof insulation boards BRE Digest 311 1986 Wind scour of gravel ballast on roofs BRE Information Paper IP 1 06 Assessing the effects of thermal bridging at junctions and around openings BRE Report BR 262 2002 Thermal insulation Avoiding risks BRE Report BR 443 2006 Conventions for U value calculations ETAG 031 2010 Guideline for European Technical Approval of Inverted Roof Insulation Kits Part 1 General Page 11 of 12 Conditions of Certification 18 Conditions 18 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 18 2 Publications documents specifications legislation regulations st
9. Dow Chemical Company Limited y a sss TESTING Diamond House CERTIFICATION Lotus Park TECHNICAL APPROVALS FOR CONSTRUCTION Kingsbury Crescent Staines Middlesex TW18 3AG Agr ment Certificate Tel 01268 798999 14 5116 e mail Rayleigh ucrs co uk Product Sheet 1 DOW CHEMICAL ROOF INSULATION GREYFOAM SL A INVERTED ROOF INSULATION This Agr ment Certificate Product Sheet relates to Greytoam SLA Inverted Root Insulation extruded polystyrene boards for use in the inverted root concept above the roof waterproofing on limited access flat roofs with either zero pitch or slopes between 1 80 and 1 6 The product can be used in conjunction with Roofmate MK a filter water control membrane between the insulation and the ballast layer forming the Rootmate Mink system to minimise rainwater flowing underneath the insulation and consequent additional heat loss 1 Hereinatter referred to as Certificate CERTIFICATION INCLUDES e factors relating to compliance with Building Regulations where applicable e factors relating to additional non regulatory information where applicable independently veritied technical specitication assessment criteria and technical investigations design considerations installation guidance regular surveillance of production formal three yearly review KEY FACTORS ASSESSED Thermal performance the product can contribute towards the thermal performance of a roof when installed on ty
10. alue 3 p mm day NOTE fx 0 001 W day m 2 K mm 6 2 Cold rainwater reaching the root waterproofing membrane will temporarily affect the rate of heat loss trom the root and should be accounted for by adding a correction AU to the calculated roof U value in accordance with section 7 and Annex D 4 of BS EN ISO 6946 2007 as follows AU pfx R R where AU correction to the calculated thermal transmittance of the roof element W m2 K p average rate of precipitation during the heating season mm day f drainage factor giving the traction of p reaching the waterproof membrane x factor for increased heat loss caused by rainwater flowing on the membrane 0 04 W day m K mmt R thermal resistance of the layer of the insulation above the waterproofing membrane m 2 K VWW R total thermal resistance of the construction before application of the correction m2 K VW 1 Monthly and seasonal average rainfall for different UK locations 1981 to 2010 can be found at htto www metottice gov uk climate uk averages ukmapavge html and divided by the number of days to obtain p in mm day f 6 3 The product can contribute to maintaining continuity of thermal insulation at junctions For Accredited 53 A Construction Details the corresponding psi values in BRE Information Paper IP 1 06 Table 3 may be used in carbon emission calculations in Scotland and Northern Ireland Detailed guidance for other junctions and on
11. alue does not exceed 0 35 W mr Kc at any point and the junctions with other elements are designed in accordance with Limiting thermal bridging and air leakage Robust construction details tor dwellings and similar buildings TSO 2002 BRE Information Paper IP 1 06 or section 6 3 of this Certificate not exceed 1 2 W m K at any point and the root complies with Annex H of BS 5250 2011 Further A 7 4 Roots will adequately limit the risk of surface condensation when the thermal transmittance U value does guidance may be obtained from BRE Report BR 262 2002 Interstitial condensation 7 5 Roots will adequately limit the risk of interstitial condensation when they are designed and constructed in 55 accordance with BS 5250 2011 Annexes D and H 8 Behaviour in relation to fire 8 1 When fully supporting one of the following ballast layers the roof may be considered to be of designation EXT F AA low vulnerability in Scotland and therefore adequately resist fire soread over the roof and trom adjacent buildings e minimum 50 mm deep layer of washed rounded gravel of nominal size 16 mm to 32 mm e minimum 40 mm thick standard pressed concrete paving slabs to BS EN 1339 2003 8 2 The designation of other specifications should be contirmed by test or assessment 8 3 The product should not be laid over compartment walls 9 Resistance to foot traffic When covered with a ballast layer as specified in section 4 the product ca
12. andards 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 18 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 are reviewed by the BBA as and when it considers appropriate 18 4 The BBA has used due skill care and diligence in preparing this Certiticate but no warranty is provided 18 5 In issuing this Certificate the BBA is not responsible and is excluded trom any liability to any company firm organisation or person for any matters arising directly or indirectly trom 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 actual 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 workmanshi
13. en to carry out the above measures on a regular basis through a surveillance process to verify that the specifications and quality control operated by the manufacturer are being maintained 2 3 The management system of Dow Chemical Company Ltd has been assessed and registered as meeting the requirements of BS EN ISO 9001 2008 by BSI Management Systems Certificate No Q05968 2 4 Greytoam SLA Inverted Root Insulation is manufactured by Dow Chemical Company Limited for distribution within the UK by Undercover Rooting of Sirdar Road Brook Industrial Estate Rayleigh Essex SS6 7XF 3 Delivery and site handling 3 1 The product is delivered to site bearing the manufacturer s name and the BBA logo incorporating the number of this Certificate 3 2 The product must be protected from prolonged exposure to sunlight by either storage under cover or covering with lightcoloured opaque polythene sheets 3 3 Care must be taken to prevent contact with solvents and materials containing organic components 3 4 Where large volumes are stored especially indoors flammable material and ignition sources should not be permitted in the vicinity and adequate ventilation at least two air changes per hour should be ensured Assessment and Technical Investigations The following is a summary of the assessment and technical investigations carried out on Greytoam SL A Inverted Root Insulation 4 General 4 1 Greyfoam SLA Inverted Roof Insulation is for use
14. ered with one or more of the following roof waterproofing specifications e builtup felt rooting BS 8217 2005 using Type 3 and Type 5 felts to BS 8747 2007 e mastic asphalt laid in accordance with BS 8218 1998 e other waterproofing systems including reinforced single oly membranes which are the subject of a current Agr ment Certiticate laid in accordance with and within the limitations imposed by that Certificate 4 6 It is essential that roof falls and drainage paths are correctly designed to avoid ponding and subsequent risk of silt build up stresses in freezing conditions and to reduce water entry in the event of failure in the waterproofing layer 4 7 The root shall be designed with adequate falls unless the root waterprooting system has been specifically designed and approved for use in a zero pitch roof application For zero pitch roofs it is particularly important to identity the correct drainage points to ensure that the drainage provided is sufficient and effective 4 8 Dual level roof drainage should be provided in accordance with BS 6229 2003 and BS EN 12056 3 2000 to drain water off at the level of the water control layer and at the level of the root waterproofing 4 9 Where there is a risk trom plasticiser migration or other contaminants trom the roof waterproofing a suitable plastic fibre or similar isolating sheet must be interposed between the roof waterproofing and the insulation boards For loose laid single
15. g process was evaluated including methods of quality control Details were also obtained of the quality and composition of the materials used Dow Chemical Company Limited has declared the designation of this product to be XPS EN13164 T1 DLT 2 5 CS 10 Y 300 CC 2 1 5 750 1 30 WDIV 1 WLTJO 7 FTCD 1 DS 70 90 in accordance with Section 6 of BS EN 13164 2012 Bibliography BS 5250 2011 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 1339 2003 Concrete paving flags Requirements and test methods BS EN 12056 3 2000 Gravity Drainage Systems inside Buildings Roof drainage layout and calculation BS EN 13164 2008 Thermal insulation products for buildings Factory made products of extruded polystyrene foam XPS Specification BS EN 13164 2012 Thermal insulation products for buildings Factory made extruded polystyrene foam XPS products Specification BS EN ISO 6946 2007 Building components and building elements Thermal resistance and thermal transmittance Calculation method BS EN ISO 900
16. layer root waterproofing membranes a cushion layer should be interposed 4 10 Sufficient insulation should be provided to maintain the roof waterproofing layer which acts as a vapour control layer above the dew point particularly for lightweight decks See section 7 2 4 11 Gravel ballast rounded low fines of nominal size 16 mm to 32 mm should be washed and laid to a minimum thickness of 50 mm Paving ballast should comprise a minimum 40 mm thickness of standard pressed concrete paving slabs to BS EN 1339 2003 The imposed dead loads are approximately 80 kg m and 100 kg m respectively 4 12 The ballast layer must be installed to prevent wind uplift see also section 15 5 and provide complete protection to the boards and Roofmate MK membrane from UV degradation 4 13 Care must be taken to ensure that upgraded roofs are capable of carrying the increased load and depth of the installed system 5 Practicability of installation The product can be installed by a competent general builder or contractor experienced with this type of product 6 Thermal performance w 6 1 Calculations of thermal transmittance U value should be carried out in accordance with BS EN ISO 6946 2007 BRE Report BR 443 2006 and section 6 2 of this Certificate using the data design lambda values which are the declared lambda X with addition of moisture correction given below Some example U values achieved for the Greytoam SLA in conjunction with the
17. lets and gutters it necessary Gravel loading it used should be checked for displacement and that it is not blocking a gully or exposing the boards or the Rootmate MK membrane to UV degradation If necessary turther guidance on cleaning and maintenance is available trom the Certificate holder 12 2 Should a leak occur in the roof waterproofing it must be repaired following removal of the gravel ballast layer water control layer and insulation boards Correct reinstatement of these layers must be carried out with particular care and the advice of the Certiticate holder should be sought 13 Durability 4 13 3 Care must be taken to ensure that the gravel ballast layer once installed provides complete cover to the boards or the Rootmate MK membrane at all times to avoid the risk of UV degradation 13 1 The product is not significantly affected by freeze thaw cycles and water 13 2 The inverted roof will have a life of at least 25 years under normal circumstances Page 7 of 12 14 General 14 1 Greytoam SL A Inverted Root Insulation should be installed in accordance with the relevant guidance in section A of this Certificate providing adequate load bearing capacity falls drainage sound root waterproofing and limited risk of condensation 14 2 The insulation product is laid in accordance with the Certificate holder s instructions The product is light and may be installed in any weather but due to their size care will be needed i
18. 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 tor new build Scotland Accredited Construction Details Scotland Northern Ireland Accredited Construction Details version 1 0 7 Condensation risk 7 1 The inverted root concept maintains the roof waterproofing close to the building s internal temperature and consequently presents a low risk of interstitial or surface condensation 7 2 The Rootmate MK membrane will substantially limit the tlow of cold rainwater between the boards and the root waterproofing The duration and extent of deck cooling and consequent risk of interstitial or surface condensation will therefore be negligible with concrete decks However care should be taken with lightweight decks R lt O 15 m K VW and when upgrading existing roof structures particularly it they contain existing insulation Where the Roofmate Page 6 of 12 MK membrane is not used the risk of interstitial condensation due to deck cooling may be assessed by reducing the proposed thickness of Greytoam SL A insulation by 20 for the purposes of the risk calculation to BS 5250 2011 Annexes D and H 9 and BS EN ISO 10456 2007 7 7 3 Roots will adequately limit the risk of surface condensation when the thermal transmittance U v
19. membrane and without the Rootmate MK membrane are shown in Tables 3 and 4 0 037 W mr K A for 100 mm thick Greyfoam SLA boards 0 036 W mr K A for thickness from 101 mm to 120 mm thick Greyfoam SLA boards 0 038 W mr K Ay for gt 120 mm thick Greytoam SLA boards 0 03 drainage factor F for Mink system 0 75 drainage factor f for Greyfoam SL A without Roofmate MK membrane Page 5 of 12 Table 3 Example roof U values Greytoam SIA without the membrane U value Insulation thickness mm for different rainfalls W rn 2 K p3 o3 2 o3 3 p3 8 OTa 2x 160 2x 180 0 15 140 120 160 140 180 160 0 18 2x 120 140 120 0 20 2x 120 0 25 160 200 140 120 1 Deck taken as 200 mm dense reinforced concrete A 2 5 W mr K 2 Thinnest available thickness or thickness combination to achieve the design U value 3 p mm day NOTE fx 0 03 W day m2 K mm Table 4 Example root U values with Rootmate MinK system with the membrane U value Insulation thickness mm for different rainfalls Wem pel pel 2 pel 3 pel 8 O 10 2x 180 2x 180 2x 180 200 180 0 13 2x 140 2x 140 2x 140 2x 140 O 15 2x120 2x 120 2x 120 2x 120 0 18 200 200 200 0 20 180 180 180 0 25 160 160 160 160 1 Deck taken as 200 mm dense reinforced concrete A 2 5 W mr K 2 Thinnest available thickness or thickness combination to achieve the design U v
20. n accept the limited foot trattic and light concentrated loads associated with installation and maintenance operations 10 Resistance to plant growth and insects 10 1 The product when covered with one of the protection systems described in the Installation section will not normally support the growth of plants However where there is run off from a large sill or gully onto the surface of the root excessive build up of silt may provide conditions for germination of seeds Therefore this type of detail should be avoided Growth that may occur will be restricted will not normally affect the performance of the roof and will be no worse than that which may occur on traditional flat roots 10 2 Although small insects may be found under the product they will neither attack nor have any effect on the performance or durability of the boards 11 Effect on roof waterproofing 11 1 The inverted root concept will provide solar protection and also limit the range of temperatures to which the waterprooting membrane will be subjected Placing the insulation on top of the root waterproofing will normally lead to an extended lite of the waterproofing layer 11 2 Separation or cushion layers between the boards and the roof waterproofing may be needed in some circumstances see section 4 7 of this Certificate 12 Maintenance 12 1 The inverted root concept requires little or no maintenance other than annual removal of any plants and cleaning of water out
21. n high winds Installers must not carry them near to parapets or apertures in the deck and once placed they must be restrained immediately 14 3 Itis essential that all joints between the boards are tight and no gaps exist where they meet rooflights edge details and other services which perforate the root deck The product can be cut easily using for example a handsaw or knife 14 4 Roofmate MK membrane should be loose laid over the insulation at right angles to the slope with 300 mm deep weathered laps running down the slope At upstands and penetrations Roofmate MK membrane should be turned up to finish above the surface of the ballast layer and turned down at drainage outlets 14 5 The loading layer should be installed in accordance with BS 6399 2 1997 and BRE Digest 295 1985 and BRE Digest 311 1986 14 6 The ballast loading layer must be applied as work progresses to protect the insulation and the filter water control layer trom the effects of wind uplift and solar degradation The ballast must not be stacked in one place on the root unless the roof is strong enough to support it Upgrading roofs 14 7 In existing roots see Figure 6 in section 15 7 all the requirements of sections 14 1 to 14 6 apply and in addition the existing roofing and substructure must be examined for degradation and where necessary repairs effected Particular consideration should be given to the condensation risk that the existing roof structure may presen
22. p 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 18 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 Certiticate 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 restate the requirements of the Health and Satety 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 satisfying 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 tax 01923 665301 Watford email mail bba star co uk Herts VVD25 OBA website www bbacerts co uk Page 12 of 12
23. pical concrete roof decks The design thermal conductivity Ay including moisture correction factor of the product is 0 036 W m K for board thicknesses ranging from 101 mm to 120 mm and 0 038 W K for thicknesses gt 120 mm see section 6 and 0 037 W m K for thickness equal to 100 mm Condensation risk the product can maintain the deck and roof waterproofing above the dew point and as part of the Mink system can reduce the risk of condensation by reducing the amount of rainwater flowing underneath the insulation and cooling the deck see section 7 Behaviour in relation to fire when the product is used in the inverted root concept the roof may be considered to be of designation EXT F AA and therefore satisfies the requirements of the national Building Regulations see section 8 Resistance to foot traffic the product in conjunction with the specified ballast layer can accept limited foot traffic associated with maintenance operations see section 9 Durability the product will have a lite of at least 25 years under normal circumstances see section 13 The BBA has awarded this 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 DANIA ee Date of First issue 30 April 2014 John Albon
24. t See section 7 of this Certiticate 14 8 Where for example parapets details and services have insufficient height to accommodate the increased depth of insulation protection due provisions need to be made ie a minimum of 150 mm trom the top of the gravel to the top of the skirtings If upgrading involves laying the product on existing inverted root insulation the advice of the Certiticate holder should be sought 14 9 Rainwater outlets will need to be modified or replaced to suit eg by the installation of gravel guards 15 Procedure 15 1 Typical new construction details are given in Figures 2 3 4 and 5 Figure 2 Typical installation detail gravel paving finish ballast eer al LAEN ete paving slabs on spacer pads Roofmate MK Greytfoam SLA Inverted Root Insulation e _ concrete slab waterproof layer Page 8 of 12 Figure 3 Water outlet detail gravel finish rainwater outlet ballast Roofmate MK Greyfoam SLA Inverted Root Insulation waterproof layer screed to falls concrete slab Figure 4 Water outlet detail paving slab finish m _ 7 F jn i Ee 7 E Pa FF 7c Sar ae me F 5 K 4 SS a ae a eme j i of n ig rainwater outlet paving slabs on spacer pads Roofmate MK Greyfoam SLA Inverted Roof Insulation waterproof layer screed to falls concrete slab Page 9 of 12
25. tificate holder has taken the responsibility of CE marking the insulation product in accordance with harmonised European Standard BS EN 13164 2012 An asterisk appearing in this Certificate indicates that data shown is given in the manufacturer s Declaration of Performance Page 2 of 12 Technical Specification 1 Description 1 1 Greytoam SL A Inverted Roof Insulation comprises extruded polystyrene foam boards rebated for lap jointing see Figure 1 The product can be used in conjunction with Rootmate MK a tilter water control membrane between the insulation and the ballast layer forming the Rootmate MinK system to minimise rainwater flowing underneath the insulation and consequent additional heat loss for use with a gravel ballast or paving finish Figure 1 Greyfoam SI A extruded polystyrene foam board A LI A Or 3 Y J cy Yo thickness Yo thickness section A to A 15 mm 15 mm 0 6m J 7 oe Yo thickness Yo thickness a 15 mm section B to B 1 2 The product has the nominal characteristics shown in Table 1 Table 1 Nominal Characteristics of Greyfoam SLA Nominal characteristics Minimum density kg m 33 Compressive strength kPa gt 300 Work size mm 1250 x 600 Overall size mm 265x015 Edge detail rebated all sides Rebate size mm 15 x half board thickness Thicknesses mm 100 120 140 160 180 and 200 Colour pale grey Page 3 of 12 1 3
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