Lindab SA ASTRON BUILDINGS ASTRON LMR 600 ROOF
Contents
1. Material Thickness Manufacturing Standard Yield strength Ultimate Minimum nominal N mmr2 tensile elongation in mm strength 50 mm N mm Hotdip aluminium zinc alloy 0 66 BS EN 10346 2009 S320GD AZ 185 or other 320 400 390 18 coated steel sheet structural grades to BS EN 10346 2009 0 75 BS EN 10346 2009 S420A YP AZ 185 or other 420 490 490 560 16 structural grades to BS EN 10346 2009 Clip assembly C section clips see Figure 2 manufactured from 2 mm thick galvanized steel grade S390GD Z275 N AC manufactured in accordance with BS EN 10346 2009 interlock the profile sheets and are secured to the roof structure with one self tapping screw with an integral sealing washer The clips are available in two heights with two or four lock tabs as shown in Table 3 and Figure 2 The lock seam tabs are formed from 0 6 mm thick stainless steel strip number 1 4301 to BS EN 10088 2 2005 Table 3 Clip and tab identifiers Clip height mm Tabs Part identifiers Two lock tab configuration Four lock tab configuration 60 Not fixed YO2024 Y02034 84 Y02026 Y02036 60 Fixed YO2044 YO2054 84 YO2046 YO2056 Figure 2 Clip and tab assembly double lock seam LMR 600 panel screw fixing wee clip section through seamed panel clip two locked tabs clips four locked tabs Page 5 of 16 Isobloc bar lsobloc b2. 2 Single skin roof with bridge beam 3 Double skin roof The sheets are attached together by a clip assembly system fixed by mechanical fasteners to the roof purlins via a bridge beam and a bridge support bracket which lift the roof panels above the purlins The inner face of the insulation has a bonded vapour control layer Insulation thicknesses between 140 mm and 200 mm are available The sheets are attached together by a clip assembly system fixed by mechanical fasteners to the roof purlins via an omega rail and an omega bracket which lift the roof panels above the purlins An Isobloc bar is incorporated between clips under the profiled sheet and over the insulation blanket in line with the omega rails and the purlins A liner panel is fixed above the purlins under the inner face of the insulation Insulation thicknesses between 120 mm and 260 mm are available 1 2 The main components of these systems are Profile sheets Aluminium zinc coated steel profiled sheets see Figure 1 are available in two thicknesses in lengths up to 18 m with a tolerance of 3 mm Where necessary the ends of the sheets are punched to provide notches and bolt holes for use during installation Specification of the sheet is given in Table 2 Figure 1 LMR 600 Profile all dimensions in mm 25 j 430 25 82 a 60a 480 a 60 Page 4 of 16 Table 2 LMR 600 profiled sheet specifications
3. Regulation 34 Internal fire spread Linings Regulation 35 1 3 4 Internal fire spread Structure Comment The interior exposed surfaces of the systems have been assessed as having the surface classification given in section 11 2 of this Certificate Regulation 36 b External fire spread Comment The external surface of the sheets has been assessed as having a Byoolt4 classification in accordance with EN 13501 5 2005 and therefore constructions incorporating the systems are not subject to a minimum distance from a boundary See section 11 1 of this Certificate Regulation 39 a i Conservation measures Comment The systems can meet the requirements of this Regulation See sections 8 and 10 1 to 10 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 section 3 Delivery and site handling 3 2 of this Certificate Additional Information CE marking The Certificate holder has taken the responsibility of CE marking the following components of the system LMR 600 profile sheets to EN 14782 2006 Steel structural components Clips and tabs Bridge beam and brackets Omega rail and brackets to EN 1090 1 2009 An asterisk appearing in this Certificate indic
4. dead loads 1 35 in the same direction as imposed loads 1 00 the opposite direction to imposed loads imposed loads 1 50 snow and wind attachment 2 00 The resistance values given in the table should be compared to the characteristic unfactored snow and wind loads The data takes into account the selFweight of the roof sheets Positive deflection limit span 150 and negative deflection limit span 50 For single spans excessive loads or spans different deflection criteria different factors of safety and different metals advice should be sought from the Certificate holder 6 2 The loads listed in Table 5 incorporate safety factors accounting for the properties of the materials the method of design and analysis and details of construction and workmanship Wind loads must be checked in accordance with the recommendations of BS EN 1991 1 4 2005 Imposed snow loads must be established in accordance with the recommendations of BS EN 1991 1 3 2003 6 3 The systems are designed to withstand normal foot traffic without sustaining damage The sheets are capable of withstanding impacts associated with normal handling installation and service 6 4 At the maximum wind uplift pressures given in Table 5 the fluted part of the panels may deflect sometimes producing noise This is a characteristic of the system and is not detrimental to performance 6 5 The systems are capable of accommodating thermal movement of the outer s
5. the systems will resist the passage of moisture to the inside of the building See sections 9 1 to 9 6 of this Certificate Requirement C2 c Resistance to moisture Comment The risks of harmful effects arising from interstitial and surface condensation will be minimal See sections 7 1 and 7 2 of this Certificate Requirement F1 Means of ventilation Comment A roof construction incorporating one of the systems can be designed to satisfy this Requirement See sections 10 1 to 10 3 of this Certificate Requirement L1 a i Conservation of fuel and power Comment The systems can contribute to meeting the requirements of this Regulation See sections 8 9 and 10 1 to 10 3 of this Certificate Regulation 7 Materials and workmanship Comment The systems are acceptable See section 13 and the Installation part of this Certificate Regulation 26 CO emission rates for new buildings Comment The systems can contribute to meeting the requirements of this Regulation See sections 8 9 and 10 1 to 10 3 of this Certificate k The Building Scotland Regulations 2004 as amended 5 Regulation 8 1 2 Fitness and durability of materials and workmanship Comment The use of the systems satisfies the requirements of this Regulation See sections 12 and 13 and the Installation part of this Certificate Regulation 9 Building standards in relation to construction Standard 1 1 a b Structure Comment The systems have sufficient
6. 16 Standard 7 a Statement of sustainability Comment The systems 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 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 40 Aspect 1 7 1 6 Aspect 11 and 7 1 70 Aspect 1 See section 10 of this Certificate 1 Technical Handbook Domestic 5 a The Building Regulations Northern Ireland 2012 Regulation 23 Fitness of materials and workmanship Comment The systems are acceptable See section 13 and the Installation part of this Certificate Regulation 28 Resistance to moisture and weather Comment When subjected to the maximum design loads given in sections 6 1 and 6 2 the systems will resist the passage of moisture to the inside of the building See sections 7 1 and 7 2 of this Certificate Requirement 29 Condensation Comment The roof systems can be designed and constructed to meet the requirements of this Regulation See sections 9 1 to 9 6 of this Certificate Regulation 30 Stability Regulation 31 Disproportionate collapse Comment The systems have sufficient strength and stiffness to sustain and transmit the design load without excessive deflection or deformation See sections 6 1 to 6 5 of this Certificate
7. process for management of non conformities e checked that equipment has been properly tested and calibrated e undertaken 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 Lindab SA has been assessed and registered as meeting the requirements of BS EN ISO 9001 2008 by Bureau Veritas Certificate number 11000430 3 Delivery and site handling 3 1 The panels are transported in crates carrying a label bearing CE mark They must be stored flat away from the risk of abrasion and impact in a dry well ventilated area 3 2 The rolls of insulation must be handled carefully and must not be stored on end They should be left in their protective wrapping until ready for installation 3 3 All fasteners and sealants used for the roof construction should be checked separated and stored in a dry protected area to ensure they are not damaged before installation 3 4 Trims and flashings must be stored in a protected area and strategically placed to prevent excessive handling Assessment and Technical Investigations The following is a summary of the assessment and technical investigations carried out on the Astron LMR 600 Roof Systems 4 General 4 1 The Astron LMR 600 Roof Systems when fixed to purlins is satisfactory for use as a fullytinished structural roof deck for roofs
8. rail and bracket omega rail omega bracket Page 6 of 16 Insulation There are two types of insulation available e Astrotherm insulation is a glass wool blanket manufactured in accordance with BS EN 13162 2012 and available in thicknesses of 40 mm 60 mm 80 mm 100 mm and 120 mm Thicknesses of 140 mm 160 mm 200 mm and 260 mm are obtained with two or three layers of insulation The declared thermal conductivity is 0 037 W m K and the density 16 kg m It is used tor the double skin roof type e Astrotherm ASA is a glass wool blanket used for single skin roof systems with the same characteristics as Astrotherm but in addition has a vapour barrier bonded to the inner face which consists of A white varnish lacquered aluminium foil 20 ym thick A fibreglass scrim reinforcement An aluminium foil 12 ym thick A flame resistant adhesive Liner profile The liner panel is a galvanized steel profile sheet of 0 54 mm thickness grade SSS5OGD Z275 M ZA255 M or AZ150 M or 0 62 mm thickness grade S350GD Z275 M ZA255 M or AZ150 M manufactured to BS EN 10346 2009 see Figure 6 38 mm deep with 1000 mm cover width The sheets are coated on both sides with 25 or 35 pm polyester or 25 pm PVDF The liner panel is also available perforated for improved acoustic properties designated LPG1000 The acoustic properties are not part of the scope of this certificate Figure 6 LPS 1000 liner pr
9. strength and stiffness to transfer the design load with reference to clause 1 1 1 See sections 6 1 to 6 5 of this Certificate Standard 25 Internal linings Standard 2 6 Spread to neighbouring buildings Comment The interior exposed surfaces of the systems have been assessed as having the risk classification given in sections 11 1 and 11 2 of this Certificate with reference to clause 2 5 10 Standard 2 8 Spread from neighbouring buildings Comment The sheets have a low vulnerability classification with reference to clause 2 8 1 See sections 11 1 and 11 2 of this Certificate Standard 3 10 Precipitation Comment When subjected to the maximum design load given in this Certificate the systems will resist the passage of moisture to the inside of the building with reference to clause 3 10 1 See sections 7 1 and 7 2 of this Certificate Standard B15 Condensation Comment The systems will have a minimal risk of surface condensation or of damage due to interstitial condensation with reference to clauses 3 15 1 to 3 15 7 See sections 9 2 to 9 4 of this Certificate Standard 6 1 b Carbon dioxide emissions Standard 6 2 Building insulation envelope Comment The systems can contribute to satisfying in full or part clauses 6 1 20 6 2 1 and 6 2 4 See sections 8 1 to 8 4 of this Certificate The system can also contribute to satisfying clauses 6 2 50 and 6 2 60 See sections 8 and 10 1 to 10 4 of this Certificate Page 2 of
10. the systems and e rate of corrosion of aluminium alloy and aluminium zinc coated steel in various environments and compatibility with other materials 18 2 An assessment was made of the durability of the systems 18 3 The thermal properties of the system were evaluated by 3 dimensional modelling of the constructions 18 4 The manufacturing process was examined including the methods adopted for quality control and details were obtained of the quality and composition of the materials used 18 5 A visit was made to a construction in progress to examine the practicability of installation of the systems Bibliography BRE Information Paper IP1 06 Assessing the effects of thermal bridging at junctions and around openings BS 5250 2011 Code of practice for control of condensation in buildings BS 5925 1991 Code of practice for ventilation principles and designing for natural ventilation BS 6229 2003 Flat roofs with continuously supported coverings Code of practice BS EN 1990 2002 Al 2005 Eurocode Basis of structural design BS EN 1991 1 3 2003 Eurocode Actions on structures General actions Snow loads BS EN 1991 1 4 2005 Al 2005 Eurocode 1 Actions on structures General actions Wind actions BS EN 1993 1 3 2006 Eurocode 3 Design of steel structures General rules Supplementary rules for cold formed members and sheeting BS EN 10088 2 2005 Stainless steels Technical delivery condition
11. F lt APPROVAL Lindab SA BBA i CERTIFICATION Route d Ettelbruck TECHNICAL APPROVALS FOR CONSTRUCTION L 9230 Diekirch a 80291 1 Fax OO 352 80291 2497 Agrement Certificate el ax email info astron biz 1 3 501 4 website www astron biz Product Sheet 1 ASTRON BUILDINGS ASTRON LMR 600 ROOF SYSTEMS This Agr ment Certificate Product Sheet relates to Astron LMR 600 Roof Systems comprising profiled aluminium zinc coated steel panels insulation and accessories for fixing to purlins and rafters of steel on roofs with a finished slope of between 1 and 30 and curved roofs with a radius of 70 m or greater for use in non domestic buildings 1 Hereinafter referred to as Certificate CERTIFICATION INCLUDES e factors relating to compliance with Building Regulations where applicable factors relating to additional non regulatory information where applicab independently veritied technical specification assessment criteria and technical investigations design considerations installation guidance regular surveillance of production formal three yearly review KEY FACTORS ASSESSED Structural performance the roof systems will remain structurally stable if installed in accordance with the provisions of this Certificate and deflections will not be excessive under normal service conditions see section 6 O 4 Weathertightness the roof systems will resist the passage of rain and wind d
12. Z185 B S e Tape sealant preformed butyl rubberbased sealant used for sealing of exterior joints e Silicone sealant used in sealing various lap type joints of metal panels osure between LMR6OO Rubber closure used at eave to close the LMR600 profile e Panel end closures 0 62 or 0 63 mm thick galvanized steel grade S320GD used at ridge with panel end c Page 7 of 16 e Panel splice plate galvanized steel grade S250GD used at ridge with panel end closure and also overlapping panels together with an aluminium strap e Solid foam fillers Closure polyethylene foam for liner panel used at eaves 1 4 Accessories such as flashing panels gutters skylights smoke vents or ventilators can be provided by the Certificate holder but are outside the scope of this Certificate 2 Manufacture 2 1 The sheets are strengthened fluted and roll formed to the required profile During the manufacturing rolling process a flexible hotmelt sealant is applied to the underside of the partially formed standing seam on one side of the sheet 2 2 As part of the assessment and ongoing surveillance of product quality the BBA has e agreed with the manufacturer 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
13. ar insulating strips are manufactured from extruded polystyrene to EN 13164 2012 with a minimum nominal density of 35 kg m and a declared thermal conductivity of A 0 029 W m K The Isobloc bars have the dimensions given in Figure 3 and are installed between clips under the profile sheets and over the insulation blanket in line with the purlins to reduce thermal bridging They are used in the single skin roof system with insulation thicknesses over 40 mm and in the double skin roof system Figure 3 Isobloc bar dimensions in mm a Bridge beam and bracket see Figure 4 The beam is manufactured from 1 54 mm galvanized steel grade S390GD Z275N AC in accordance with BS EN 10346 2009 The bridge beams are slid on top of bridge support bracket which is built from the same specification as the beam and available in 80 mm and 100 mm in height The bracket sits on an isolation pad made of polypropylene Figure 4 Bridge beam and bracket with isolation pad bridge beam bridge bracket with isolation pad Omega rail and bracket see Figure 5 The rail is manufactured from 1 54 mm galvanized steel grade S390GD Z275 CO in accordance with BS EN 10346 2009 The Omega brackets from 1 95 mm for roof thicknesses 120 mm 140 mm 160 mm 180 mm or 2 04 mm for roof thicknesses of 200 mm and 260 mm in height thick galvanized steel and to the same material specification as the rail Figure 5 Omega
14. ates that data shown is given in the manufacturer s Declaration of Performance This Certificate relates to Astron LMR 600 Roof Systems consisting of seamed profiled sheets used as a structural roof with a finished slope of between 1 and 30 where access is provided for maintenance and repair only Astron LMR 600 Roof Systems comprise coverings of interlocking profiled aluminium zinc coated steel sheets secured to the roof with hidden fixings such that through ixing of the roof sheeting is not required clips and supporting substructure insulation vapour control barrier single skin or liner panel double skin The supporting purlins as well as the gutters and gutter support hangers are outside the scope of this Certificate Page 3 of 16 Technical Specification 1 Description 1 1 The Astron LMR 600 Roof Systems construction types covered in this Certificate are described in Table 1 Table 1 IMR 600 systems System make up Construction type Description 1 Single skin roof with or without Isobloc bar The sheets are attached together by a clip assembly system fixed by mechanical fasteners to the roof purlins For thicknesses above 40 mm an Isobloc bar is incorporated between clips under the profiled sheet and over the insulation blanket in line with the purlins The inner face of the insulation has a bonded vapour control layer Insulation thicknesses between 40 mm and 120 mm are available
15. avoids the possibility of salt deposits on the sheltered side of the panels in coastal conditions The panel should not be used for installations within 0 5 km of the sea and for installations proposed within 5 km of the sea the Certificate holder should be consulted 14 Reuse and recyclability The metal components of the systems are fully recyclable 15 General The Astron LMR 600 Roof Systems including panels panel splices panel end closures ridge end covers gutter supports and gable fascias are installed by certified contractors working in accordance with the LMR 600 Roof System Technical amp Erection Manual 16 Procedure 16 1 The installation procedure commences once the supporting steel frame has been erected Page 11 of 16 Single skin and single skin with bridge systems see Figure 7 Figure 7 Single skin systems insulation not shown for clarity 16 2 The insulation is placed over the purlins in one run from eaves to ridge with the faced side down However when roll lengths are insufficient to ensure continuity an overlap of 100 mm must be made The edges of the vapour barrier of adjacent rolls are folded up and stapled together at 150 mm centres and the two layers are then folded back on themselves and stapled at 150 mm centres between the previous staples The clips or clips and bridge brackets are fixed to the purlins through the insulation and a second layer of insulation put in place if require
16. d 16 3 If installing the single skin with bridge system the bridge beams are located over the bridge support brackets Double skin system see Figure 8 Figure 8 Double skin systems insulation not shown for clarity LMR6OO panel 6 4 The liner panels are positioned with all joints lapped and fixed to the roof purlins Side and end laps of the liner panels are sealed using mastic sealant Any swart or debris is removed 16 5 The insulation is laid directly over the liner panel and the Omega brackets are fixed through the liner to the purlin Where practical insulation should be laid in one continuous run from eaves to ridge However when roll lengths are insufficient to ensure continuity an overlap of 100 mm must be made 16 6 In some cases the insulation can be laid in two or three layers the first prior to the Omega brackets and the second and third cut and tucked around the brackets 6 7 The Omega rails are located over the Omega brackets and the clip and tab assembly fixed onto the Omega rails 16 8 The LMR 600 sheets are installed working from right to left The sheets are joined using a selfpropelling roll forming machine to create a standing seam As the machine progresses from eaves to ridge the tabs are rolled into the standing seam and a factory applied bead of non hardening sealant is compressed inside the first turn of the seam see Figure 9 The tabs are free to move back and forth in the clips in the d
17. d email mail bba star co uk Herts VWWD25 9BA website www bbacerts co uk Page 16 of 16
18. d email mail bba star co uk Herts WD25 9BA website www bbacerts co uk Page 1 of 16 Regulations In the opinion of the BBA the Astron LMR 600 Roof Systems if installed used and maintained in accordance with the provisions of this Certificate will meet or contribute to meeting 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 42 The Building Regulations 2010 England and Wales as amended 5 Requirement A1 Loading Comment The systems have sufficient strength and stiffness to sustain and transmit the design loads in accordance with sections 6 1 to 6 5 of this Certificate Requirement B2 Internal fire spread Linings Requirement B3 2 Internal fire spread structure Comment The interior exposed surfaces of the systems have been assessed as having the surface classitication given in section 11 2 of this Certificate Requirement B4 2 External fire spread Comment The external surface of the sheets has been assessed as having a Byao t4 classification in accordance with EN 13501 5 2005 therefore constructions incorporating the system are not subject to the limitations of a minimum distance from a boundary See section 11 1 of this Certificate Requirement C2 b Resistance to moisture Comment When subjected to the maximum design loads given in sections 6 1 to 6 4
19. endent on the performance of the other building elements Provided these also incorporate appropriate design details and building techniques air infiltration through the building envelope should be minimal and the building reasonably airtight airtightness in accordance with the requirements of Approved Documents L1A and L2B section 20A Technical Booklet F1 sections 2 59 to 2 69 and Technical Booklet F2 sections 2 72 to 2 77 respectively 10 4 In Scotland completed dwellings are subject to testing air permeability in accordance with the requirements Ae Mandatory Standard 6 2 clause 6 2 5 Alternatively where a default design value of 15 m m h at 50 Pa is stated in demonstrating compliance under Mandatory Standard 6 1 testing is not required 10 3 In England Wales and Northern Ireland completed buildings are subject to pre completion testing for Page 10 of 16 10 5 Air leakage design test data are available from the Certificate holder 11 Performance in relation to fire 11 1 The external surfaces of the Astron LMR 600 Roof sheets have been assessed as having a B t4 gt designation in accordance with BS EN 13501 5 2005 low vulnerability in Scotland and therefore constructions incorporating the system are not subject to a minimum distance from a boundary 11 2 The internal surface of the LPS liner sheets has been assessed as class O or low risk as defined in the Building Regulations 11 3 T
20. he reaction to fire classification of the internal surface of the single skin system Astrotherm ASA has been assessed as Al in accordance with BS EN 13501 1 2007 12 Maintenance g 12 1 The systems should be inspected regularly at least once a year for accidental damage to the roof sheets A and the coatings Any build up of dirt and debris should be removed The frequency of the inspection will depend on the environment and use of the building 12 2 In industrial and coastal areas it will be necessary to clean the installation periodically by hosing with water and a neutral detergent to maintain its appearance and remove corrosive deposits It may be necessary to clean soffits in any environment 13 Durability 4 13 1 The service life of the Astron LMR 600 Roof Systems will depend upon the environment in which it is used When used in the context of this Certificate the minimum service life will be 25 years for rural environments and 20 years for industrial or urban environments A shorter service life will be given if particular local conditions are chemically corrosive eg in the immediate vicinity of and downwind from chemical works cement works copper foundries or coal mines 1 Service life in the context of this Certificate is defined as the life to the first major maintenance 13 2 The panels do not need painting for corrosion resistance in normal environments 13 3 It is important that the design of installation
21. heets provided it is installed in accordance with this Certificate and the Certificate holder s instructions 7 Weathertightness 4 7 2 The weathertightness o 7 1 When installed in accordance with the Certificate holder s instructions and the installation part of this Certificate the systems are weathertight when used on roofs with a finished fall of 1 to 30 or curved roofs and within the maximum positive and negative loadings shown in Table 5 f the systems will not be adversely affected by normal service deflections 8 Thermal insulation 4 8 2 Acceptable thermal transmittance values U values are given in Table 6 Unless otherwise stated the thermal conductivity Xp based on Xgo 99 data value of the insulation has been taken as 0 037 W m K The LMR 600 roof types not listed in Table 6 are only available to use for unheated buildings 8 1 The thermal performance of each building incorporating the systems must be evaluated in accordance with the relevant Building Regulations and is the responsibility of the overall designer of the building Table 6 Acceptable U values W m K for LMR 600 Roof Systems Type of construction Thickness of insulation mm 160 200 260 Single skin bridge 0 25 Double skin 0 250 0 20 0 17 Note Standard LMR roof construction with 1 5 m purlin spacing 1 Not valid for Scotland 8 3 Itis essential that a suitable continuous air barrier is installed to limit air inf
22. iltration see sections 10 1 to 10 4 and that details such as eaves and gables are designed to adequately limit heat loss by conduction for example by filling with insulation to maintain the insulation envelope and by minimising thermal bridges Typical details are shown in Figure 7 8 4 The systems can contribute to maintaining continuity of thermal insulation at junctions between elements and openings For Accredited Construction Details the corresponding psi values in BRE Information Paper IP1 06 Table 3 16 Page 9 o 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 for new build see also SAP 2009 Appendix K and the iSBEM User Manual Scotland Accredited Construction Details Scotland Northern Ireland Accredited Construction Details version 1 0 9 Condensation risk 4 9 1 In common with all metal roof constructions there is a risk of condensation This can arise as either 5 interstitial condensation within the roof construction or surface condensation at thermal bridges Surface condensation FA on the internal relative humidity and the internal and external temperatures The risk of surface condensation and mould growth for a particu
23. irection of the seams allowing for thermal movement of the panels except for single skin bridge roof where fixed clips are used The tabs are located in the centre of the slots of the clip as determined by correct positioning of the centring device The sheets are secured by rolling the seam around the upstand on the clips Page 12 of 16 Figure 9 Creating the standing seam 1 135 90 45 Ist step 2nd step 3rd step roll forming machine compresses panels together under pressure to form a tight seal 16 9 End joints between adjacent sheets are made using a splice plate a panel strap screws and sealant see Figure 10 Figure 10 End lap detail panel splice plate 16 10 After joining the sheets the various ridge eaves and gutter details are completed see Figure 1 1 Page 13 of 16 Figure 11 Typical details insulation not shown for clarity rubber closure eaves flashing panels panel end closure panel splice plate clip assembly ridge Page 14 of 16 17 Tests Tests were carried out on the weathertightness of the roof systems to establish e resistance to air and water penetration under various wind loading conditions e resistance to gusting and cyclic loading 18 Investigations 18 1 An examination was made of the existing data on e structural performance of the systems e performance in fire of similar roof systems e condensation risk of
24. lar construction should be assessed in accordance with BS EN ISO 13788 2012 Additional guidance in connection with this can be found in BS 5250 2011 9 3 In buildings likely to experience high internal relative humidities eg building internal humidity class 5 as defined in BS EN ISO 13788 2012 and BS 5250 2011 there is a small risk of intermittent condensation forming on the fixing screws penetrating the purlin The designer should anticipate the areas of the structure that could be at risk from sustained sources of humidity and take the necessary measures to prevent any such problems 7 The temperature at which surface condensation will occur on the internal surfaces of the roof is dependent Interstitial condensation 9 4 The systems have been assessed by computer modelling for the risk of damage and harmful effects on the building due to interstitial condensation The modelling predicts that for buildings in internal humidity classes 1 and 2 see Table 7 under the normal climatic conditions experienced in the UK interstitial condensation and consequent reductions in the thermal and structural performance of the roof systems are unlikely to be a significant problem This assessment is only valid provided the following details are carried out in accordance with the Certificate holder s instructions and this Certificate e the vapour control layer remains undamaged is continuous over ridges and is sealed at penetrations abutmen
25. milar 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 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 19 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 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 Watfor
26. ofile je 1000 333 3 gt 333 3 333 3 123 87 3 123 colour side Fasteners The mechanical fasteners used in the system are given in Table 4 Table 4 Fastener specification Fastener Description Reference Use Number of type fasteners self tapping screw 9 3 mm diameter by 26 mm HCO02022 attach C clips to the roof purlins single skin roof 1 long with an integral sealing attach C clips to the bridge beam single skin roof with washer bridge attach C clips to omega rail double skin roof stainless steel 7 1 mm diameter by 25 mm long HCOO162 used in conjunction with a metatbacked rubber washer 4 600 mm selHtapping screw to fix the sheets to the eave structural member to the splice plate at overlap and to end closure at ridge Low carbon steel case 6 3 mm diameter by 32 mm long HC00163 connect the bridge beams together single skin roof 1 hardened with bridge self drilling screws attach the support brackets to the purlins single skin 2 roof with bridge attach omega brackets to the purlins double skin roof 2 4 attach omega rail to omega bracket double skin roof 1 Stainless steel 5 5 mm diameter by 35 mm HC00310 to fix the liner panels to the purlins 1 washered self drilling 333 mm fasteners 1 3 333 mm at panel overlap 1 3 Other components of the system are e Ridge panel 0 66 mm thick pitched profile sheet galvanized steel grade S320GD AZ185 B CO or A
27. riven snow when installed in accordance with the provisions of this Certificate see section 7 Thermal insulation the systems can provide adequate insulation to contribute to the building meeting the requirements of the national Building Regulations see section 8 f Condensation risk the risk of condensation forming under normal service conditions is negligible see section 9 Durability durability of the roof systems depends on the location environment and coating finish used see section 13 The BBA has awarded this Agr ment Certificate to the company named above for the systems described herein These systems have been assessed by the BBA as being fit for their intended use provided they are installed used and maintained as set out in this Certificate On behalf of the British Board of Agr ment B Aake _ Chamber Date of First issue 9 July 2013 Brian Chamberlain Claire Curtis Thomas Head of Approvals Engineering 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 fax 01923 665301 Watfor
28. rm 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 19 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 19 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 Ei aioe 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 19 4 The BBA has used due skill care and diligence in preparing this Certificate but no warranty is provided 19 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 si
29. s for sheets plate and strip of corrosion resisting steels for general purposes BS EN 10346 2009 Continuously hotdip coated steel flat products Technical delivery conditions BS EN 13162 2012 Thermal insulation products for buildings Factory made mineral wool MVV products Specification BS EN 13501 1 2007 Al 2009 Fire classification of construction products and building elements Classification using test data from reaction to fire tests BS EN 13501 5 2005 Al 2009 Fire classification of construction products and building elements Classification using data from external fire exposure to roof tests BS EN ISO 9001 2008 Quality management systems Requirements BS EN ISO 13788 2012 Hygrothermal performance of building components and building elements Internal surface temperature to avoid critical surface humidity and interstitial condensation Calculation methods EN 13164 2001 Thermal insulation products for buildings Factory made products of extruded polystyrene foam XPS Specification EN 1090 1 2009 Mandatory CE Maark for structural metallic components EN 14782 2006 Selfsupporting metal sheet for roofing external cladding and internal lining Product specification and requirements Page 15 of 16 Conditions of Certification 19 Conditions 19 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 fi
30. ts e vapour control layer laps are adequately sealed e for installations without the separate vapour control layer for some building internal humidity classes 1 and 2 only the risk of interstitial condensation should be established in accordance with BS EN ISO 13788 2012 and BS 5250 2011 the liner panel laps must be adequately sealed Table 7 Building internal humidity classes Humidity class Building type 1 Storage areas 2 Offices shops 5 Special buildings eg laundries breweries swimming pools 1 Partially reproduced from BS EN ISO 13788 2012 and BS 5250 2011 495 9 5 For buildings or areas of a building with special internal design conditions a hygrothermal assessment of 9 the proposed roof system should be undertaken using the guidance given in BS 5250 2011 BS 5925 1991 and BS 6229 2003 to establish whether special provisions are required 10 Air permeability 10 1 The airtightness of the systems are reliant on the careful sealing of the liner or vapour control layer The airtightness of a roof system is dependent on maintaining the integrity of seal throughout In addition to sealing at all joints the liner or vapour control layer must be suitably sealed at the perimeter and all penetrations Details of sealing at all laps eaves ridges hips valleys and penetrations must be in accordance with the Certificate holder s instructions 10 2 The airtightness of the building will also be dep
31. with slopes from 1 to 30 and curved roofs with a radius of ZO metres or greater where access is provided only for maintenance and repair 4 2 The roof structure is designed in accordance with BS EN 1993 1 3 2006 4 3 The systems are fixed to steel purlins at least 1 5 mm thick and designed in accordance with BS EN 1993 1 3 2006 5 Practicability of installation The systems should only be installed by installers who have been trained and approved by the Certificate holder 6 Structural performance 6 1 When supported on purlins spaced horizontally at not more than 1500 mm the panels have adequate 53m strength and stiffness to sustain the loads given in Table 5 Page 8 of 16 Table 5 Maximum characteristic resistance to snow and wind loads for LMR 600 roof system Span m Maximum positive snow loading Maximum negative wind loading kKN m 2 kKN m 84 mm height 60 mm height Four tab Two tab clips clips clips clips 1 0 4 19 3 22 2 66 1 46 is 2 26 1 67 1 84 1 01 Notes e The span is the horizontal distance between adjacent purlins e Values are applicable for uniformly distributed loads for double and multiple span roofs where all spans are equal to or within 15 of the largest span The data has been prepared in accordance with the national annexes NA to BS EN 1990 2002 and BS EN 1993 1 3 2006 and has been verified by testing Partial safety factors used for generating the above data are
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