ALUMINIUM FOIL BUBBLE INSULATION AIRTEC DOUBLE DOUBLE BUBBLE CAVITY WALL INSULATION

Transcription

1 YBS Insulation Ltd Unit 1 Crags Industrial Park Morven Street Creswell Derbyshire S80 4AJ Tel: Fax: sales@ybsinsulation.com website: APPROVAL INSPECTION TESTING CERTIFICATION TECHNICAL APPROVALS FOR CONSTRUCTION Agrément Certificate 08/4565 Product Sheet 3 ALUMINIUM FOIL BUBBLE INSULATION AIRTEC DOUBLE DOUBLE BUBBLE CAVITY WALL INSULATION This Agrément Certificate Product Sheet (1) relates to Airtec Double Double Bubble Cavity Wall Insulation for use in cavity walls. It is installed centrally within the cavity, during construction and retained by wall ties fitted with snap on plastic clips. (1) Hereinafter referred to as Certificate. CERTIFICATION INCLUDES: factors relating to compliance with Building Regulations where applicable factors relating to additional non-regulatory information where applicable independently verified technical specification assessment criteria and technical investigations design considerations installation guidance regular surveillance of production formal three-yearly review. KEY FACTORS ASSESSED Thermal performance the product can be used to improve the thermal performance of a wall construction (see section 6). Condensation risk the performance of the product with regard to interstitial and surface condensation has been considered (see section 7). Liquid water penetration the performance of the product with regard to liquid water penetration has been considered (see section 8). Behaviour in relation to fire the product is combustible and has a Class F reaction to fire classification to EN : 2007 (see section 9). Durability the product is rot-proof, dimensionally stable and durable and will remain effective as an insulant for the life of the building (see section 11). 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 Agrément Date of Second issue: 28 November 2012 Sean Moriarty Head of Approvals Greg Cooper Originally certificated on 8 May 2009 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 Readers are advised to check the validity and latest issue number of this Agrément Certificate by either referring to the BBA website or contacting the BBA direct. British Board of Agrément tel: Bucknalls Lane fax: Watford mail@bba.star.co.uk Herts WD25 9BA 2012 website: Page 1 of 8

2 Regulations In the opinion of the BBA, Airtec Double Double Bubble Cavity Wall Insulation, if installed, used and maintained in accordance with 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): The Building Regulations 2010 (England and Wales) (as amended) Requirement: B3(4) Requirement: C2(a) Requirement: C2(b) Requirement: C2(c) Requirement: L1(a)(i) Requirement: Regulation 7 Internal fire spread (Structure) Walls incorporating the product can meet this Requirement. See sections 9.3 to 9.5 of this Certificate. Resistance to moisture Walls incorporating the product can meet this Requirement. See section 8.1 of this Certificate. Resistance to moisture Walls incorporating the product can meet this Requirement. See sections 4.2, 4.4 to 4.8 and 8.2 of this Certificate. Resistance to moisture Walls incorporating the product can contribute to meeting this Requirement. See sections 7.1 and 7.3 of this Certificate. Conservation of fuel and power The product can contribute to meeting this Requirement. See sections 6.2 to 6.5 of this Certificate. Materials and workmanship The product is acceptable. See section 11 and the Installation part of this Certificate. The Building (Scotland) Regulations 2004 (as amended) Regulation: 8(1) Fitness and durability of materials and workmanship The product can contribute to a construction satisfying this Regulation. See sections 10, 11 and the Installation part of this Certificate. Regulation: 9 Building standards applicable to construction Standard: 2.4 Cavities A wall containing the product must comply with this Standard, with reference to clauses (1)(2), (1)(2), (1) and (2). See sections 9.3 to 9.5 of this Certificate. Standard: 3.4 Moisture from the ground The product does not absorb water by capillarity actions and, therefore, may be used where it bridges the dpc of either leaf, with reference to clause (1)(2) of this Standard. See section 8.1 of this Certificate. Standard: 3.10 Precipitation Walls incorporating the product can satisfy this Standard, with reference to clause (1)(2). See sections 4.2, 4.4 to 4.8 and 8.2 of this Certificate. Standard: 3.15 Condensation Walls incorporating the product can satisfy this Standard, with reference to clauses (1)(2), (1)(2) and (1)(2). See sections 7.2 and 7.3 of this Certificate. Standard: 6.1(b) Carbon dioxide emissions Standard: 6.2 Building insulation envelope Walls incorporating the product can satisfy, or contribute to satisfying this Standard, with reference to clauses (1), (1)(2), (1), (2) and (2), (1) to (1), (2) to (2), (1)(2). See sections 6.2 to 6.5 of this Certificate. Standard: 7.1(a)(b) Statement of sustainability The product can contribute to meeting the relevant requirements of Regulation 9, Standards 1 to 6 and therefore will contribute to a construction meeting a bronze level of sustainability as defined in this Standard. See sections 6.2 to 6.5 of this Certificate. Regulation: 12 Building standards applicable to conversions All comments given for this product under Regulation 9, also apply to this Regulation, with reference to clause (1)(2) and Schedule 6 (1)(2). The Building Regulations (Northern Ireland) 2012 Regulation: 23(a)(i)(iii) Fitness of materials and workmanship The product is acceptable. See section 11 and the Installation part of this Certificate. Regulation: 28(a)(b) Resistance to moisture and weather Walls incorporating the product can satisfy this Regulation. See sections 4.2, 4.4 to 4.8, 8.1 and 8.2 of this Certificate. In addition, the product may be used where it bridges the dpc in either leaf. Regulation: 29 Condensation The product can contribute to satisfying this Regulation. See section 7.3 of this Certificate. Page 2 of 8

3 Regulation: 35(1)(4) Internal fire spread Structure Walls incorporating the product can meet this Regulation. See sections 9.3 to 9.5 of this Certificate. Regulation: 39(a)(i) Conservation measures Regulation: 40(2) Target carbon dioxide emission rate The product can contribute to a building satisfying its target emission rate. See sections 6.2 to 6.5 of this Certificate. Construction (Design and Management) Regulations 2007 Construction (Design and Management) Regulations (Northern Ireland) 2007 In the opinion of the BBA, there is no information in this Certificate which relates to the obligations of the client, CDM co-ordinator, designer and contractors under these Regulations. Additional Information NHBC Standards 2011 NHBC accepts the use of Airtec Double Double Bubble Cavity Wall Insulation, when installed and used in accordance with this Certificate, in relation to NHBC Standards, Chapter 6.1 External masonry walls. General This Certificate relates to Airtec Double Double Bubble Cavity Wall Insulation, a double-layer polyethylene bubble sheet faced on both sides with aluminium foil, for use as thermal insulation in buildings up to and including 25 m in height, subject to the conditions contained in the Design Considerations part of this Certificate. A clear air space of at least 20 mm must be maintained between the Airtec Double Double Bubble and the inner leaf construction. Technical Specification 1 Description 1.1 Airtec Double Double Bubble Cavity Wall Insulation consists of two layers of polyethylene bubble sheet faced on both sides with aluminium foil. 1.2 The product is supplied in rolls 1.05 m, 1.2 m or 1.5 m wide and 25 m long, with 50 m long rolls made to order. The product has an approximate thickness of 7 mm. 1.3 Ancillary components include: YBS aluminium adhesive tape, 50 m by 75 mm wall ties and insulation retaining clips for use with the product should be manufactured in accordance with BS EN : Manufacture 2.1 Airtec Double Double Bubble is manufactured in a two stage heat seal vacuum forming machine. The first Airtec layer comprises a foil-faced topcoat and a polyethylene film which are firstly fed into the machine, where the film is blown to the required thickness. After being vacuum formed, a polyethylene backing film is finally applied. A second Airtec layer is then produced in the same way, but using the first layer as backing to produce the double layered product. 2.2 As part of the assessment and ongoing surveillance of product quality, the BBA has: agreed with the manufacturer the quality control procedures and product testing to be undertaken assessed and agreed the quality control operated over batches of incoming materials monitored the production process and verified that it is in accordance with the documented process evaluated the process for management of nonconformities checked that equipment has been properly tested and calibrated 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. 3 Delivery and site handling 3.1 The product is wrapped in polyethylene and labelled. The label details the date of manufacture and an instruction leaflet is enclosed. 3.2 The product should be stored upright on a firm, level and dry base and protected from damage in clean, dry conditions. 3.3 Since the product is combustible, care must be exercised when storing large quantities on site. The product must not be exposed to open flame or other ignition sources and must be stored away from flammable material such as paint and solvents. Page 3 of 8

4 Assessment and Technical Investigations The following is a summary of the assessment and technical investigations carried out on Airtec Double Double Bubble Cavity Wall Insulation. Design Considerations 4 General 4.1 Airtec Double Double Bubble Cavity Wall Insulation is effective in reducing the thermal transmittance (U value) of new external cavity walls with masonry inner and outer leaves (where masonry includes clay and calcium silicate bricks, concrete blocks and natural and reconstituted stone blocks). It is essential that such walls are designed and constructed to incorporate the normal precautions to prevent moisture penetration. 4.2 New buildings subject to national Building Regulations and Standards should be suitable when assessed in accordance with the relevant recommendations of: BS EN : 2005, BS EN : In particular, the designer should select a construction appropriate to the local wind-driven rain index paying due regard to the design detailing, workmanship and materials to be used (1) BS : (1) The construction and detailing should comply with good practice as described in BBA joint publication Cavity Insulation of Masonry Walls Dampness Risks and How to minimise them. They are particularly important in areas subject to severe driving rain. 4.3 Other new buildings not subjected to any of the above should also be built in accordance with the Standards given in section It is important that the following conditions are observed during construction and installation of the product: the product should only be installed when the first leaf has adequate strength the minimum residual cavity width (between the product and the outer leaf) should be 50 mm approved methods of fixing must be used the second and consecutive runs of the products should have weathered laps of 75 mm minimum. 4.5 The use of cavity battens and/or boards during construction is strongly recommended to prevent bridging by mortar droppings. 4.6 This Certificate covers the use of the product in any exposure zone subject to compliance with the conditions stated in section As with any other form of cavity wall insulation, where buildings need to comply with NHBC Standards 2011, Section 4 Superstructure, specifiers should observe the requirements of these Standards. 4.8 It is recommended that installation is carried out to the highest level on each wall or that the top edge of the insulation is protected by a cavity tray. 5 Practicability of installation The product is designed to be installed by a competent general builder, or a contractor, experienced with this type of product. 6 Thermal performance 6.1 Calculations of the thermal transmittance (U value) of specific external wall constructions should be carried out in accordance with BS EN ISO 6946 : 2007 and BRE Report (BR 443 : 2006) Conventions for U-value calculations, using an emissivity of 0.07 for the foil. Cavities adjacent to the product with widths 25 mm will have a thermal resistance of m 2 K W 1. A thermal resistance value of 0.17 m 2 K W 1 per layer can be used. 6.2 Most masonry cavity wall constructions incorporating the product will not achieve the maximum U value permitted in normal circumstances of 0.35 W m 2 K 1 in England, Wales and Northern Ireland. However, with the use of a high performance block leaf (for example, low thermal conductivity AAC, thickness greater than 100 mm, and thin jointing), this U value can be achieved. 6.3 When considering insulation requirements, designers should refer to the detailed guidance contained in the documents supporting the national Building Regulations. 6.4 When used in conjunction with additional insulation as appropriate, for example insulated dry lining or external wall insulation, the product can contribute to achieving the design U values detailed within the national Building Regulations. Page 4 of 8

5 Junctions 6.5 The product can contribute to maintaining continuity of thermal insulation at junctions between the external wall and the other building elements. Guidance in this respect, and on limiting heat loss by air infiltration, can be found in: England and Wales Approved Documents to Part L and for new thermal elements to existing buildings, Accredited Construction Details (version 1.0). See also SAP 2009 Appendix K and the isbem User Manual for new-build Scotland Accredited Construction Details (Scotland) Northern Ireland Accredited Construction Details (version 1.0). 7 Condensation risk Surface condensation 7.1 Walls will limit the risk of surface condensation adequately when the thermal transmittance (U value) does not exceed 0.7 W m 2 K 1 at any point, and the junctions with floors, roofs and openings are designed in accordance with TSO publication Limiting thermal bridging and air leakage: Robust construction details for dwellings and similar buildings TSO 2002 or BRE Information Paper IP 1/06 Assessing the effects of thermal bridging at junctions and around openings. 7.2 For buildings in Scotland, constructions will be acceptable where the thermal transmittance (U value) of the wall does not exceed 1.2 W m 2 K 1 at any point and openings and junctions with other elements comply with the guidance given in BS 5250 : 2011 section 4 and Annex G and BRE Report (BR 262 : 2002) Thermal insulation: avoiding risks. Interstitial condensation 7.3 Walls will limit the risk of interstitial condensation adequately when they are designed and constructed in accordance with BS 5250 : 2011 section 4 and Annex G. 7.4 The product has a nominal vapour resistance exceeding 500 M N s g 1 and, therefore, the product will provide a significant resistance to water vapour transmission. Joints between the product will facilitate the passage of water vapour under normal conditions of temperature and humidity. 7.5 The use of the product does not preclude the normal precautions against formation of condensation, especially in rooms expected to have high humidity. 8 Liquid water penetration 8.1 When the product is used in situations where it bridges the dpc in walls, dampness from the ground will not pass through to the inner leaf provided the cavity wall is detailed in accordance with the requirements and provisions of the national Building Regulations: England and Wales Approved Document C2(a) Scotland Mandatory Standard 3.4, clause (1)(2) Northern Ireland Technical Booklet C, Section Constructions incorporating the product and built in accordance with BS EN : 2005, BS EN : 2006, will resist the transfer of precipitation to the inner leaf and satisfy the national Building Regulations: England and Wales Requirement C2(b) Scotland Mandatory Standard 3.10, clause (1)(2) Northern Ireland Technical Booklet C, Section In all situations it is particularly important to ensure during the installation that: wall ties and fixings are installed correctly and are thoroughly clean excess mortar is cleaned from the cavity face of the leading leaf and any debris removed from the cavity installation is carried out to the highest level on each wall or the top edge of the insulation is protected by a cavity tray all the usual precautions for draining penetrated water are taken, for example, above tie beams, projecting floor beams and window sills all horizontal laps are weathered to the outside where the product is used in detail situations, for example, vertical dpc at windows and doors, they will be effective in resisting rain penetration. 9 Behaviour in relation to fire 9.1 The product is combustible and has a Class F reaction to fire classification to EN : Cavity walls should always have a cavity closer at the top of the cavity and around openings. The materials must not be taken past fire stops. Page 5 of 8

6 9.3 As with other combustible cavity wall insulation materials, naked flames or sparks should not be allowed near the material either whilst in storage or during installation. 9.4 Details of parts of a wall construction where cavity barriers can be omitted can be found in the following supporting documents: England and Wales Approved Document B, Volume 1, Diagram 13 and Volume 2, Diagram 34 Scotland Mandatory Standard 2.4, clauses (1)(2), (1)(2), (1) and (2) Northern Ireland Technical Booklet E, Diagram For constructions not covered by section 9.4, cavity barriers must be provided to comply with: England and Wales Approved Document B, Volume 1, Section 6, and Volume 2, Section 9 Scotland Mandatory Standard 2.4, clauses (1)(2), (1)(2), (1) and (2) Northern Ireland Technical Booklet E, Paragraphs 4.36 to The product is combustible but is unrestricted in walls with two leaves of masonry/concrete at least 75 mm thick, with cavity barriers around all openings and at the top of the wall in accordance with The Building (Scotland) Regulations 2004 (as amended) Mandatory Standards 2.6, clauses (1) and (2). 10 Maintenance As the product is confined within the wall cavity and it has suitable durability (see section 11), maintenance is not required. 11 Durability When correctly installed, the product is durable, rot-proof, water resistant and sufficiently stable to remain effective as an insulant for the life of the building. Installation 12 General 12.1 The walls are constructed leading with either the inner or outer leaf. It is recommended that the inner leaf be constructed ahead of the outer leaf as this will ensure the laps are weathered to the outside The fixing of the product at the top of the wall will depend on the method of cavity closure, but the product can be dressed under the brick capping course The product can be dressed under sills but with regard to cavity trays, should be flush to the outer face, as with lintels or flanges of meter boxes and service penetrations. 13 Procedure 13.1 The leading leaf should be constructed to a height of approximately 1.2 m (five blocks) above dpc level The wall ties (see section 1.3) should be installed in accordance with BS EN : 2005, BS EN : 2006, with special attention to eaves and openings where closer spacing of wall ties will be necessary The stop of the wall tie is butted against the inner leaf and this creates the minimum cavity between the product and the blockwork It is essential that extra care is taken by building operatives when the exposed ends of the wall ties could pose a risk of injury. Eye protection is recommended Once the blockwork has attained adequate strength, the initial run of product is positioned over the wall ties, ensuring that it is kept taut but with sufficient drop to below floor insulation. The product can be cut with a sharp blade to fit onto wall ties The top edge of the product should be a minimum of 75 mm over the top row of the wall ties giving a weathered lap joint When a full run is in position, the retaining clip is fixed to the wall tie to keep the product central to the cavity The second leaf is built up to the topmost line of the wall ties, (or two courses below) and the second run of product installed ensuring a minimum lap of 75 mm. Page 6 of 8

7 13.9 Vertical joints in the product should always be on a line of wall ties, ensuring a 100 mm lap (ie 50 mm either side of the wall tie) All vertical joints are sealed using approved tape (see section 1.3) At door and window openings the product can be butted against the cavity closer or brought through the closed reveal to act as an insulating dpc At internal and external corners a minimum air space of 25 mm must be maintained. Mortar droppings After each section of the leading leaf is built, excess mortar must be removed from the cavity face and mortar droppings cleaned from exposed coated face of the product, before the installation of the next run. Use of a cavity board or a cavity batten will protect the installed product and help keep the cavity clean as the following leaf is built All building involving the product, particularly work which is interrupted, must conform to BS EN : 2005, BS EN : Technical Investigations 14 Investigations Tests and assessment were carried out on Airtec Double Double Bubble Cavity Wall Insulation to determine: emissivity thermal resistance. Bibliography BS 5250 : 2011 Code of practice for control of condensation in buildings BS : 2001 Workmanship on building sites Code of practice for masonry BS EN : 2003 Specification for ancillary components for masonry Ties, tension straps, hangers and brackets BS EN : 2005 Eurocode 6 : Design of masonry structures General rules for reinforced and unreinforced masonry structures BS EN : 2006 Eurocode 6 : Design of masonry structures Design considerations, selection of materials and execution of masonry BS EN ISO 6946 : 2007 Building components and building elements Thermal resistance and thermal transmittance Calculation method EN : 2007 Fire classification of construction products and building elements Classification using test data from reaction to fire tests Page 7 of 8

8 Conditions of Certification 15 Conditions 15.1 This Certificate: relates only to the product/system that is named and described on the front page 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 is valid only within the UK has to be read, considered and used as a whole document it may be misleading and will be incomplete to be selective is copyright of the BBA is subject to English Law 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 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: are maintained at or above the levels which have been assessed and found to be satisfactory by the BBA continue to be checked as and when deemed appropriate by the BBA under arrangements that it will determine are reviewed by the BBA as and when it considers appropriate The BBA has used due skill, care and diligence in preparing this Certificate, but no warranty is provided 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: the presence or absence of any patent, intellectual property or similar rights subsisting in the product/system or any other product/system the right of the Certificate holder to manufacture, supply, install, maintain or market the product/system actual installations of the product/system, including their nature, design, methods, performance, workmanship and maintenance any works and constructions in which the product/system is installed, including their nature, design, methods, performance, workmanship and maintenance any loss or damage, including personal injury, howsoever caused by the product/system, including its manufacture, supply, installation, use, maintenance and removal any claims by the manufacturer relating to CE marking 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 satisfying the requirements of the 1974 Act or of any statutory, common law or other duty of care. British Board of Agrément tel: Bucknalls Lane fax: Watford mail@bba.star.co.uk Herts WD25 9BA 2012 website: Page 8 of 8