Synseal Extrusions Ltd SYNSEAL CAVITY CLOSER SYSTEMS
Contents
1. in terms of wind loading resistance the system can be used in all areas of the UK The system must not be used to support loads from masonry see section 7 Properties in relation to fire the installed system will not contribute significantly to the growth of a tire The system does not constitute a cavity barrier see section 8 Durability the system protected within the cavity will last the normal expected lite of a building visible components will have an expected life similar to a PVC U window see section 1 1 The BBA has awarded this Agr ment Certificate to the company named above for the system described herein This system 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 a Ee Date of Second issue 11 January 2011 Simon Wroe Greg Cooper Originally Certiticated on 28 April 2010 Head of Approvals a 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 British Board of Agr ment tel 01923 665300 Bucknalls Lane w OOZES COSS0 Garston Watford email mail bba star co uk Herts VVD25 9BA website www bbacerts co uk Page of 16 Regulations In the opinion of the BBA the Cavseal C2. smoke and flame in the context of the Building Regulations me The use of the system is not prevented in England and Wales where generally cavity barriers are not 7 gm equired around openings in masonry wall construction 8 4 In Scotland and Northern Ireland the system is only suitable for use in conjunction with a cavity barrier meeting the performance requirements defined in Scotland Mandatory Standard 2 4 clause 2 4 1012 and Annex 2 B or 2 D 2 1 Technical Handbook Domestic 2 Technical Handbook Non Domestic Northern Ireland Technical Booklet E paragraph 3 37 8 5 The use of the system does not preclude the need to provide suitable fire protection to steel lintels where this is necessary to satisty the Building Regulations 9 Security against intrusion Removal of a window trom the cavity frame from the outside is extremely difficult as the shape of the outer frame prevents access to the locating tangs If required for any reason supplementary through fixing of the window frame is possible The position of individual fixing cleats if used is not evident and even if the fixing position is identified the cleat is not readily accessible The door frames are secured by lugs or through fixings around the perimeter outside the scope of this Certificate 10 Maintenance To ensure the maximum weathertightness the silicone seal between window or door frames and masonry must z be checked regularly and repai
3. this Certificate are those that the BBA deems to be relevant at the date of issue or re issue of this Certificate and include any Act of Parliament Statutory Instrument Directive Regulation British European or International Standard Code of Practice manufacturers instructions or any other publication or document similar or related to the aforementioned 16 3 This Certificate will remain valid for an unlimited period provided that the product system and the manufacture and or fabrication including all related and relevant 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 16 4 In granting this Certificate the BBA is not responsible for 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 the nature design methods and workmanship of or related to the installation e the actual works in which the product system is installed used and maintained including the nature design methods and workmanship of such works 16 5 Any intormation r
4. 13 7 In all installations the top brick course should be arranged to ensure that when bedded in the lintel does not exert a load on the window or door frame subtrame 13 8 The subframe is cleaned to ensure that it is free from mortar The brickwork must be allowed to set before attempting to tit the window door 13 9 The fitting of windows or doors to the subframe must be carried out in accordance with the Cavseal Cavity Closer Manual Window preparation and fitting 13 10 The correct window is selected to suit the subframe All protective wrapping is removed 13 11 For installations using the 50 mm 75 mm and 100 mm cavity closer profiles fixing clips are screw fixed to the outer frame jambs sill and head section if vented head is fitted to subframe see Figures 3 and 4 100 mm trom each corner and at centres not exceeding 300 mm A minimum of two clips per vertical member is required Alternatively windows used with the system can be secured using conventional lugs or through fixing back to the masonry For installations using the 150 mm 175 mm and 200 mm cavity closer protiles windows used with the system are secured using conventional lugs or through fixing back to the masonry 13 12 A bead of silicone sealant is applied to the upstand of the subframe and the vented head section if the latter is used 13 13 For windows titted from outside the building the window is offered up to the subframe positioning it squarely in the aperture by
5. 2 2006 Eurocode 6 Design of masonry structures Design considerations selection of materials and execution of masonry NA to BS EN 1996 2 2006 UK National Annex to Eurocode 6 Design of masonry structures Design considerations selection of materials and execution of masonry BS EN 1996 3 2006 Eurocode 6 Design of masonry structures Simplified calculation methods for unreintorced masonry siructures NA to BS EN 1996 3 2006 UK National Annex to Eurocode 6 Design of masonry structures Simplified calculation methods for unreintorced masonry structures BS EN 12608 2003 Unplasticized polwinylchloride PVC U profiles for the fabrication of windows and doors Classification requirements and test methods MOAT No 1 1974 Directive for the Assessment of Windows MOAT No 17 1990 UEAtc Technical Guide for the Agr ment of windows in PVC U Page 13 of 16 Conditions of Certification 16 Conditions 16 1 This Certificate e relates only to the product system that is named and described on the front page e is granted only to the company firm or person named on the front page no other company firm or person may hold or claim any entitlement to this Certiticate 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 16 2 Publications and documents referred to in
6. TESTING Common Road CERTIFICATION Huthwaite TECHNICAL APPROVALS FOR CONSTRUCTION Sutton in Ashfield Nottinghamshire NG17 6AD Synseal Extrusions Ltd fa Ue Agr ment Certificate Tel 01623 443200 Fax 01623 550243 e mail sales synseal com 10 4752 website www synseal co uk Product Sheet 1 SYNSEAL CAVITY CLOSER SYSTEMS CAVSEAL CAVITY CLOSER SYSTEM This Certiticate relates to the Cavseal Cavity Closer System for use as a cavity closer and to form an opening in masonry cavity walls and can provide ventilation via the vented head section AGREMENT CERTIFICATION INCLUDES e factors relating to compliance with Building Regulations where applicable e factors relating to additional non regulatory information where applicable e independently verified technical specification e assessment criteria and technical investigations e design considerations e installation guidance e regular surveillance of production e formal three yearly review KEY FACTORS ASSESSED Hygrothermal behaviour the cavity closers meet the minimum thermal resistance path of 0 45 m K VV as required by the Accredited Construction Details version 1 0 see section 5 Weather resistance the system is effective as a damp proof barrier and when used in a suitable wall construction will resist the passage of water into the interior of the building in flush and check reveal installations see section 6 Structural stability
7. applying even pressure to position the window ensuring a 30 mm or 46 mm setback see section 13 3 Where a vented head section is not fitted the head member of the window is secured using lugs or screw fixings positioned not less than 150 mm to 250 mm trom the corners and at centres not exceeding 600 mm 13 14 For windows fitted trom the inside of the building the window is offered up to the subframe trom the inside of the building and installed as described in section 13 13 Finishing 13 15 An effective sealant is applied around the perimeter of the window door internally prior fo applying internal finishes 13 16 In locations where the plaster may be subject to repeated impact eg at door reveals trom door slamming it is recommended that wet plaster be reinforced by hessian scrim or preferably replaced by dry lining 13 17 Finishing trims are fitted after completion of the window installation where required 13 18 The window is weather proofed externally using a suitable low modulus silicone sealant Page 11 of 16 14 Tests Contirmatory tests were carried out in accordance with BS EN 12608 2003 on the PVC U extrusions made from reground material and on the vented head to determine heat reversion behaviour alter heating at 150 C 15 Investigations An assessment was made of tests carried out in accordance with the methods defined in MOAT No 1 1974 on a combined subframe and PVC U window installed in a test rig to deter
8. avity Closer System if used in accordance with the provisions of this Certificate will meet or contribute to meeting the relevant requirements of the following Building Regulations The Building Regulations 2010 England and Wales a i 5 Requirement B3 4 Internal fire spread structure Comment The system can be used in constructions that meet this Requirement See section 8 3 of this Certificate Requirement C2 b Resistance to moisture Comment The system prevents the passage of moisture trom the outer leaf fo the inner leat of a cavity wall at window or door openings See sections 6 1 to 6 3 of this Certiticate Requirement C2 c Resistance to moisture Comment The system can contribute to minimising the risk of condensation See sections 5 2 and 5 3 of this Certiticate Requirement L1 a i Conservation of fuel and power Comment The system contributes to minimising heat loss at jambs and sill See sections 5 1 and 5 2 of this Certiticate Requirement Regulation 7 Materials and workmanship Comment The system is acceptable See section 11 and the Installation part of this Certiticate s The Building Scotland Regulations 2004 as amended 5 Regulation 8 1 2 Fitness and durability of materials and workmanship Comment The system can contribute to a construction satisfying this Regulation See sections 10 and 11 and the Installation part of this Certiticate Regulation 9 Building standards construct
9. ead Head section profile all sizes 3CAV3 Corner block For mechanically joining cavity closer subframe 50 mm 3CAV4 Corner block For mechanically joining cavity closer subframe 75 mm 3CAV5 Corner block For mechanically joining cavity closer subframe 100 mm 3BT Tie Cavity closer tie 3SN Fixing clips For securing window outer frame jambs to cavity closer subframe and head to vented head SHO9 4 0 x 16 mm zinc plated self drill screws Fixing clip fixing screws SH53 4 8 x 60 mm zinc plated flange head For fixing vented head onto head of window outer frame Phillips recess with V fluted selttapping thread and selt drill point screws Page 3 of 16 Figure 1 Components iE E 3CAV12 ee Ll MT Mi 3CAV14 3CAV21 3CAV22 UE in 3CAV24 3CAV150 3CAV175 oe Page 4 of 16 1 3 The jamb sill and vented head if used profiles are cut to size Slots are routed in the vented head to suit the proprietary ventilator to be used The corner blocks if used are fixed to the sill and the jamb sections The vented head it used is located between the jambs and the jamb sections are screw fixed onto it using 4 8 by 60 mm screws see Figure 2 Figure 2 Sub frame fabrication 50 75 and 100 mm cavity closers mechanically jointed sub frames mechanically fixed vented head Page 5 of 16 1 4 The main PVCU profile
10. elating to the manufacture supply installation use and maintenance 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 and maintained It does not purport in any way to restate the requirements of the Health amp Safety at Work etc Act 1974 or of any other statutory common law or other duty which may exist at the date 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 In granting this Certificate the BBA does not accept responsibility to any person or body for any loss or damage including personal injury arising as a direct or indirect result of the manufacture supply installation use and maintenance of this product system Page 14 of 16 BLANK PAGE Page 15 of 16 British Board of Agr ment tel 01923 665300 Bucknalls Lane ene OO ZS COSCO Garston Watford email mail bba star co uk Herts VVD25 9BA website www bbacerts co uk Page 16 of 16
11. incorporates a box section to fit into the recess of the wall cavity 1 5 The cavity closer profiles are produced by conventional extrusion techniques trom reground PVC U material The vented head profile visible faces are co extruded white PVC U virgin material The virgin material has previously been assessed by the BBA and complies with Case B PVC U with additional polymers as defined in MOAT No 17 1990 1 6 Polypropylene ties manufactured by standard injection moulding techniques are used to build the cavity closer frame into the surrounding mortar joints see Figures 2 3 and 4 1 7 Checks are carried out fo monitor the quality of the extrusions Figure 3 Typical head with window detail external fit external fit silicone sealant internal check reveal silicone sealant Page 6 of 16 Figure 4 Typical jamb with window detail external fit using fixing clips INSIDE QO 46 mm OUTSIDE check reveal using fixing clips Ter INSIDE OUTSIDE silicone sealant internal fit using fixing clips INSIDE silicone sealant silicone sealant OUTSIDE internal or external fit using fixing lugs silicone sealant OUTSIDE Note An additional cavity barrier is required in Scotland and Northern Ireland 2 Delivery and site handling 2 1 Assembled subtrames are labelled with system identification They are dispatched along with the requi
12. ion Standard oro Precipitation Comment Walls incorporating the system can satisfy this Standard with reference to clauses 3 10 1012 and 3 10 32 See sections 6 1 to 6 3 of this Certificate Standard Sas Condensation Comment The system can contribute to minimising the risk of condensation with reference to clauses 3 15 10 3 15 4 and 3 15 5 See sections 5 2 and 5 3 of this Certificate Standard 6 llo Carbon dioxide emissions Standard O 2 Building insulation envelope Comment The system can contribute to minimising heat loss at jambs and sill See section 5 1 of this Certificate Regulation 12 Building standards conversions Comment All comments given for this system under Regulation 9 also apply to this Regulation with reference to clause 0 12 12 and Schedule 6 l2 1 Technical Handbook Domestic 2 Technical Handbook Non Domestic 4 The Building Regulations Northern Ireland 2000 as amended 5 Regulation B2 Fitness of materials and workmanship Comment The system is acceptable See section 11 and the Installation part of this Certiticate Regulation B3 2 Suitability of certain materials Comment The system is acceptable See section 10 of this Certificate Regulation CA4 b Resistance to ground moisture and weather Comment Walls incorporating the system can contribute to meeting this Regulation The subframe can be used where checked reveals are required See sections 6 1 to 6 3 of this Ce
13. k fixed at the head The cavity closer profile sections are fitted with insulation EPS declared thermal conductivity No0790 0 038 W mr K The head batten must be removed prior to the installation of the window door frames Alternatively a vented head profile is mechanically joined to form the head section using 4 8 by 60 mm screws see Figure 2 This acts as a direct replacement to the top fixing batten with other bracing rules remaining the same 1 2 The cavity frame components and accessories are listed in Table 1 and shown in Figure 1 Table 1 List of components Manufacturer s designation Components Application 3CAV1 1 Cavity closer External tit 50 mm jamb sill Internal tit 50 mm jamb Internal tit 75 mm jamb 3CAV12 Cavity closer Internal tit check reveal 50 mm sill Check reveal 75 mm jamb Flush fit no upstand 50 mm jamb sill 3CAV13 Cavity closer External tit 75 mm jamb sill 2CAVIA Cavity closer Check reveal 50 mm jamb Internal fit check reveal 75 mm sill Flush fit no upstand 75 mm jamb sill 3CAV2 1 Cavity closer External tit 100 mm jamb sill 3CAV22 Cavity closer Internal fit check reveal 100 mm sill Flush fit no upstand 100 mm jamb sill 3CAV23 Cavity closer Check reveal 100 mm jamb 3CAV24 Cavity closer Internal fit 100 mm jamb 3CAV150 Cavity closer Flush fit no upstand 150 mm jamb sill 3CAV175 Cavity closer Flush fit no upstand 175 mm jamb sill 3CAV200 Cavity closer Flush fit no upstand 200 mm jamb sill SHV I Vented h
14. letion of the masonry It can also be used to form a checked reveal where required and to fit the window atter completion of the masonry as is conventional practice in Scotland and Northern Ireland 3 3 Masonry walls into which cavity closers are incorporated must be constructed in accordance with one or more of the following technical specifications e BS EN 1996 1 1 2005 BS EN 1996 1 2 2005 BS EN 1996 2 2006 BS EN 1996 3 2006 and the relevant National Annexes e the National Building Regulations England and Wales Approved document Al 2 section 1C Scotland Mandatory Standard 1 1021 Small Buildings Guide 1 Technical Handbook Domestic 2 Technical Handbook Non Domestic Northern Ireland Technical Booklet D 3 4 When the system is used with the vented head section and suitablysized trickle ventilator outside the scope of this Certificate it can contribute to satisfying the background ventilation requirements of the relevant building regulations Details of ventilators covered by an Agr ment Certificate can be found on the BBA website 3 5 Windows and doors are fitted into the subframe trom the outside or inside of the building 3 6 Subtrames are manufactured to suit the exact brickwork opening A 7 mm clearance per side is allowed between the subframe and window or door in accordance with the Cavseal Cavity Closer Manual 3 7 The maximum subframe cavity closer size is 2400 mm wide by 1350 mm high maxim
15. mine air permeability watertightness effect of cyclic wind loads to 1250 Pa effect of temperature variation 5 C to 55 C safety test wind loading using increased pressure of 3000 Pa and reduced pressure of 3000 Pal heat loss and condensation risk in accordance with the Accredited Construction Details version 1 0 and the Accredited Construction Details Scotland weather resistance of the system when installed in accordance with the manufacturer s instructions tire resistance and structural stability of walls incorporating the cavity closer subframe durability of the components used in the construction of the system the manutacture and quality control of the extruded protiles 1 The test was performed at reduced temperature to ensure that the contraction of the window under such conditions would not render the system unsafe Page 12 of 16 Bibliography BS EN 1996 1 1 2005 Eurocode 6 Design of masonry structures General rules for reinforced and unreinforced masonry structures NA to BS EN 1996 1 1 2005 UK National Annex to Eurocode 6 Design of masonry structures General rules for reinforced and unreinforced masonry structures BS EN 1996 1 2 2005 Eurocode 6 Design of masonry structures General rules Structural fire design NA to BS EN 1996 1 2 2005 UK National Annex to Eurocode 6 Design of masonry structures General rules Structural fire design BS EN 1996
16. ngdom Page 9 of 16 7 Structural stability 7 The system is non loadbearing and must not be used to support loads from the masonry Lintels are required above window or door openings 7 2 The system will not have an adverse effect on the structural stability of brickwork or blockwork walls constructed in the conventional manner in accordance with normal good practice as defined in the Standards listed in section 3 4 of this Certificate Use of the system does not obviate the need for conventional wall ties around the openings 7 3 A window fitted correctly into a cavity frame using fixing clips or conventional fixing lugs at the jambs and sill and conventional fixing lugs at the head or fixing screws if a vented head is used will satisfactorily transfer to the structure wind loads likely to be encountered in the UK In terms of wind loading resistance the cavity frame can be used in all areas of the UK 7 4 Door frames for use with the cavity frame require additional proprietary fixings at the jambs and sill threshold to ensure that the frame remains firmly fixed when the door is slammed Head fixings may be required for larger doorsets Reference should be made to the relevant installation procedures described in the Cavseal Cavity Closer Manual 8 Properties in relation to fire 8 1 The installed system will not contribute signiticantly to the growth of a fire 8 2 The system does not constitute a cavity barrier against the penetration of
17. rofiles with insulation adjacent to the external wall installed using fixing lugs or 46 mm or more all other installations from the inner surtace of the outer leaf and temporary timber supports are attached to the closer if required The closer trame is aligned with a spirit level and the timber supports are secured so that they are rigid and they will keep the trame square and plumb The course work is built up by one course and butted to one side of the subframe 13 4 The position of the subframe is checked and the course work on the opposite side of the subframe is built up by one level 13 5 Ties are inserted into the channel of the subframe jambs rotated through 90 and built into the mortar bed joints These ties should be fitted after the first brick course and then at every five brick intervals 300 mm centres The ties should be inserted alternately tying the subframe into both inner and outer courses ensuring that the subframe is tight against the outer brick see Figure 4 A minimum of three ties per vertical member is required 13 6 When the masonry reaches head level the head batten and any bracing support it used are removed and a lintel with associated dpc is titted across the masonry just clear of the top of subframe Where the vented head is used the subframe is tied to the building structure with fixing lugs 100 mm to 200 mm from corners and at 600 mm centres The wall construction is continued to complete the aperture
18. rs or renewal carried out promptly 11 Durability AG system is durable when installed in accordance with this Certificate and will not suffer significant 3 amp degradation when protected within the cavity The system will last the normal expected life of a building Visible components will have an expected lite similar to a PVC U window 12 General 12 1 Installation of the Cavseal Cavity Closer System must be carried out in accordance with the Cavseal Cavity Closer Manual 12 2 A cavity barrier may be required see section 8 2 12 3 Reference should be made to the typical installation details shown in Figures 3 4 and 5 when reading the installation details given in section 13 The windows in these Figures are shown for information only and do not form part of this assessment 12 4 At the build in stage it must be ensured that the subframe remains plumb level square and with parallel sides Page 10 of 16 13 Procedure 13 1 The assembled subframe including head batten or vented head is ready for building into the construction of cavity walls using traditional building methods 13 2 The cavity wall is built to the sill level ensuring that the course work is level flat and that all excess mortar is removed 13 3 The subframe is positioned in the cavity ensuring that it is facing the correct way so that the inner surface of the window frame is set in at least 30 mm 75 mm 100 mm 150 mm 175 mm and 200 mm cavity closer p
19. rtiticate Regulation C5 Condensation Comment The system can contribute to minimising the risk of condensation See section 5 3 of this Certificate Regulation F2 a i Conservation measures Regulation F3 2 Target carbon dioxide Emissions Rate Comment The system contributes to minimising heat loss at jambs and sill See sections 5 1 and 5 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 General 3 6 of this Certificate Page 2 of 16 Non regulatory Information NHBC Standards 2011 NHBC accepts the use of the Cavseal Cavity Closer System when installed and used in accordance with this Certificate in relation to NHBC Standards Chapter 6 1 External masonry walls Technical Specification 1 Description 1 1 The Cavseal Cavity Closer System see Figure 1 is an insulated grey unplasticised polyvinyl chloride PVC U cavity closer and window or door subframe used to form an opening in masonry cavity walls during construction It is made trom extruded profiles formed into a U shape template with welded or mechanically joined using moulded corner blocks corners at the sill or threshold and a temporary fixing batten typically timber 50 mm by 12 mm thic
20. site number of ties plus any additional ancillary items and installation instructions 2 2 Assembled subtrames are stacked vertically and delivered as individual items taking care to avoid distortion in transit The sub frames or profiles should be stored under cover in a clean area on edge in the case of subtrames and suitably supported to avoid distortion or damage The subtrames and profiles should be protected trom vehicular and pedestrian traffic Assessment and Technical Investigations The following is a summary of the assessment and technical investigations carried out on the Cavseal Cavity Closer System 3 General 3 1 The Cavseal Cavity Closer System is suitable for use in masonry walls with nominal cavity widths in the range 50 mm to 200 mm It can be used as a template to form an opening around which a wall can be constructed and to establish the cavity width during construction allowing PVC U windows and doors to be fixed in the reveal Windows must have an outer frame design suitable for correct fitting of the fixing clips or alternatively conventional fixing lugs or through fixings can be used The Certificate holder should be consulted on the suitability of outer frame profiles 3 2 The system provides a damp proot barrier between the inner and outer leaves at the point of closure acts as a cavity closer without forming a thermal bridge and avoids the need for cutting bricks and blocks The window door is fitted after comp
21. ttention must be given to the correct setback in order to ensure compliance with these requirements Detailed guidance on limiting heat loss and air filtration 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 Page 8 of 16 Scotland Accredited Construction Details Scotland Northern Ireland Accredited Construction Details version 1 0 Figure 5 Typical sill with window detail internal or external fit using fixing lugs internal or external fit using fixing lugs TTL silicone sealant i x silicone lt E silicone sealant sealant Mm p PN YH x 30 mm 30 mm external fit using fixing clips internal fit check reveal using fixing clips silicone sealant silicone sealant sealant Lae ig 46 mm Note An additional cavity barrier is required in Scotland and Northern Ireland 5 2 Jambs and sills incorporating the system in accordance with section 5 1 will adequately limit the risk of local surtace condensation gt 7 Under normal domestic conditions the level of interstitial condensation associated with the system will be low and the risk of any resultant damage minimal 5 4 Door frames installed with proprietary tixings
22. um perimeter 7500 mm for windows installed using fixing clips There is no size restriction when windows are tied back to the masonry using conventional fixing cleats Door frames must be fixed independently to the masonry Proprietary fixings which may be recommended by the manufacturer for this purpose are outside the scope of this Certificate 4 Practicability of installation The product is designed to be installed by a competent general builder or a contractor experienced with this type ot system 5 Hygrothermal behaviour KA 5 1 The cavity closer can contribute to maintaining continuity of thermal insulation at jambs and sills in wall 53 amp openings The path of minimum thermal resistance through the product calculated to BRE Information Paper IP8 08 Determining the minimum thermal resistance of cavity closers is at least 0 45 m K VV when used in jambs and sills with the window door trame setback 30 mm 75 mm 100 mm 150 mm 175 mm and 200 mm cavity closer profiles with insulation adjacent to the external wall installed using fixing lugs or 46 mm or more into the wall cavity all other installations see Figures 4 and 5 Example junction details shown in Figures 4 and 5 are acceptable and the corresponding heat loss rates p values in BRE Information Paper IP 1 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 A
23. which cannot be set back into the wall cavity by 30 mm or 46 mm see section 5 1 may require additional thermal insulation tor example dry lining to minimise excessive heat loss and the risk of excessive surface condensation 6 Weather resistance 3 amp constructions where a brick block closer and dpc detail would normally be used The system is also effective as a horizontal damp proot barrier at the sill or threshold 6 2 Installations with a flush in line wall opening and a minimum setback of 30 mm or 46 mm see section 5 1 see Figures 3 4 and 5 are suitable tor use in exposure zones sheltered and 2 moderate as depicted in the map contained in section 3 1 of BRE Report BR 262 2002 Thermal insulation avoiding risks The subframe may also be considered for use in other areas where a conventional return brick block closer detail with dpc has been found to provide adequate resistance to the penetration of wind driven rain 4 The system is effective as a vertical damp proot barrier at jambs of window and door openings in masonry 6 3 The system may also be used to construct a check reveal see Figures 3 4 and 5 In this construction in which the trame is positioned in a rebate behind the outer leat of the jamb the system is suitable for use in exposure Zones up to and including very severe as depicted in the map contained in section 3 1 of BRE Report BR 262 2002 which covers all exposure zones in the United Ki
Download Pdf Manuals
Related Search