PRODUCT SUSPENDED. Concrete Soffit Liner Specification Guide

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1 CI/SfB (2-) Rn7 (M2) IMPORTANT: On 1 September 2017, this product (among others) was temporarily suspended while we investigate the results of recent tests (Parts 6 and 7 of British Standard 476). In addition, we have recently identified a compliance issue relating to our calculation and testing of the declared lambda value of products in the 4000 and 5000 ranges and the Crown-Bond and Crown-Fix products within the Crown Flat Roofing range. Materials relating to this product are for information only. Concrete Soffit Liner Specification Guide 1 Floors Specification Guide

2 Tesco Extra, Woolwich Contents Introduction 3 Product Properties 4 Certification 6 Sustainability 7 Specification Support 8 Building Regulations 9 U-value Tables 10 Design Considerations and Installation Guidelines 11 General Information 15 2 Concrete Soffit Floors Liner Specification Guide

3 Introduction Premium performance Celotex insulation in a concrete soffit liner application enables specifers and installers to achieve enhanced thermal performance as well as aesthetic benefits, future proofing the building. Celotex SL5000 utilises thermal performance properties of Celotex PIR insulation bonded with calcium silicate to provide additional fire performance. Featuring a super low lambda value of W/mK, SL5000 ensures Regulatory compliance is achieved with minimal insulation thicknesses. Celotex SL5000 provides on-site benefits too, significantly reducing installation times due to the insulation and calcium silicate being supplied as one product. Delivering greater impact resistance compared to exposed insulation systems, SL5000 provides a decorative finish with no need for on-site decorating. SL5000 is supported by the Celotex Technical Centre and Thermal Bridging Models. Premium performance Celotex insulation in concrete soffit liner applications enables specifers and installers to achieve enhanced thermal performance plus aesthetic benefits, future proofing the building. 3 Concrete Soffit Floors Liner Specification Guide

4 Celotex SL5000 Product Properties Celotex SL5000 is premium performance thermal insulation board combining premium performance PIR insulation bonded to 6mm calcium silicate Dimensions: 1200mm x 2400mm Thickness Range: mm Compressive Strength: 120 kpa BS EN 826:1996 (Thermal insulating products for building applications determination of compressive behaviour)* Dimensional Stability: DS (70,90)3 - DS(-20,-)1 BS EN 1604:2013 (Thermal insulating products for building applications determination of dimensional stability under specified temperature and humidity conditions)* Thermal Performance: Celotex SL5000 has a declared thermal conductivity (λ-value) of W/mK in accordance with BS EN 13165:2008 (Thermal insulation for products factory made rigid polyurethane foam (PUR) products). *Insulation only Concrete Soffit Liner Insulation Celotex SL5000 Technical Data Product Code Thickness (mm) R-value (m 2 K/W) SL SL Weight (kg/m 2 ) SL thickness includes 6mm calcium silicate board 4 Concrete Soffit Floors Liner Specification Guide

5 Celotex SL5000 is bonded to 6mm calcium silicate rigid board to provide added fire protection Tesco Woolwich Central Fire Performance Concrete Soffit Liner Insulation The insulation component of Celotex SL5000 is Class 0 fire rated as described by the national Building Regulations having achieved: A pass to BS 476 Part 6:1989 (Fire tests on building materials and structures method of test for fire propagation for products). Classification as Class 1 in accordance BS 476 Part 7:1997 (fire tests on building materials and structures method of test to determine the classification of the surface spread of flame of products). Calcium Silicate Celotex SL5000 is PIR insulation bonded to 6mm calcium silicate rigid boards. Calcium Silicate provides a number of fire performance benefits including: A pass to BS 476 Part 4 (test method for non-combustibility) A pass to BS 476 Part 22:1987 (fire tests on building materials and structures - methods for determination of the fire resistance of non-load bearing elements of construction). 5 Concrete Soffit Floors Liner Specification Guide

6 Certification Product Code SL5000 Third party approvals play a key role in distinguishing product performance between different manufacturers. To eradicate the perception that all PIR is the same, we recognise the importance of approvals and certifications from a number of leading organisations, including BRE and ISO. These approvals include independent validation of thermal, fire and other product standards. Application BBA No. ISO 9001 ISO Concrete Soffit Liner Tesco Extra, Woolwich Central - 6 Concrete Soffit Floors Liner Specification Guide

7 Sustainability Suitable for use within a number of applications within the building fabric, the specification of Celotex products will significantly contribute to improving the energy efficiency of the UK s building stock. Celotex is also able to independently certify the environmental impact for a selection of its product ranges. This includes Celotex SL5000. Measured by its BRE Ecopoint score, Celotex achieve the lowest environmental impact of any PIR manufacturer and from its most recent recertification, has improved this score by over 5% since Moreover, when compared to the generic PIR Ecopoint value, Celotex impact is over 20% better than that of noncertified PIR manufacturers. Concrete Soffit Liner Insulation Name of Insulation Material Manufacturer Unfoamed, Foamed or Installed using Propellants Global Warming Potential (GWP) Blowing Agent Green Guide Rating SL5000 Celotex Foamed Less than 5 Pentane A+ (insulation component only) Through its BRE Approved Environmental Profile, Celotex was the first PIR manufacturer to achieve an A+ Green Guide rating. This rating has been maintained through ongoing recertification and now includes even more Celotex products as part of the profile. Celotex products are all manufactured in accordance with environmental management system ISO As well as this, the suppliers of the principal raw materials used in the manufacture of Celotex products also possess this standard allowing a credit to be achieved within the materials category of BREEAM assessments. Celotex manufacture solutions that start saving energy as soon as they are installed. Over its useful life, PIR insulation saves over 100 times more energy than was used in its manufacture. For further information please see Celotex Sustainability Guide available at celotex.co.uk Element Number Environmental Management System (EMS) - Key Process Environmental Management System (EMS) - Supply Chain Process ISO ISO Concrete Soffit Floors Liner Specification Guide

8 Specification Clause This includes provision of: Specification Support Energy Assessments For more information on how to download Celotex SL5000 for BIM, visit celotex.co.uk/bim Celotex SL5000 The concrete soffit liner insulation shall be Celotex SL5000 mm thick, comprising a polyisocyanurate (PIR) rigid foam insulation core bonded to a layer of 6mm calcium silicate. The insulation component of SL5000 is A+ rated when compared to the BRE Green Guide, is CFC/ HCFC free with low GWP and zero ODP and achieves CE marking compliance to BS EN The product is manufactured in accordance with quality management systems ISO 9001 and environmental management system ISO All products must be installed in accordance with instructions issued by Celotex. Building Information Modelling (BIM) Celotex SL5000 is available for BIM in the following software formats: Autodesk Revit Industry Foundation Classes (IFC) Celotex products are available for BIM through both celotex.co.uk/bim and the NBS National BIM Library. NBS Specifications Celotex SL5000 is referenced in the following NBS clauses: P10/185 K11/890 Technical Services Celotex provide outstanding levels of technical expertise and personal assistance through two industry leading services: Celotex Technical Centre When it comes to finding easy-tounderstand, quick and helpful advice regarding PIR insulation, the Celotex Technical Centre (CTC) is where you will discover high levels of support and guidance on finding the most appropriate solutions to meet your requirements. U-value calculations Condensation risk analysis Application and installation advice Guidance on compliance to Building Regulations Information on our product and environmental credentials Call the Celotex Technical Centre on to speak to one of our technical experts, or alternatively technical@celotex.co.uk Thermal Bridging Celotex offers a wide range of junction details and these can be downloaded via the Celotex members area. When designed in to a building they offer a significant contribution to the improvement of the fabric energy efficiency. Due to the way whole-building energy calculations work, having better junction details can benefit the designer. As insulation levels increase, the risk of condensation occurring around junctions also increases. Using construction details such as Celotex Thermal Bridging models helps to address the issue. By improving the performance of the junction, the amount of insulation required in the walls is optimised. Celotex Thermal Bridging models have low psi values and can prevent condensation from forming to ensure that mould growth does not occur. Find out more at celotex.co.uk Celotex Energy Assessments Offering energy calculations including SAP, SBEM and bespoke thermal modelling as well as additional services for pre-tender planning and sustainability assessments for the Code for Sustainable Homes and BREEAM. For more information on Celotex Energy Assessments (CEA) please take a look at the CEA brochure on celotex.co.uk with a full breakdown of the services we can provide for your project requirements. For more information please phone or info@celotexea.co.uk Customers should be aware that Celotex and Darren Evans Assessments are separate legal entities and Celotex makes no warranty as to the quality of the services that DEA provides and assumes no responsibility in connection with those services. Customers should also be aware that, as an Assured Partner of Celotex, Darren Evans Assessments operate under a commercial agreement with Celotex for services provided by Darren Evans Assessments under the Celotex Energy Assessment Service. 8 Concrete Soffit Floors Liner Specification Guide

9 Building Regulations England Part L 2013 Part L is an Approved Document within the Building Regulations for England dealing with the Conservation of Fuel and Power. It ensures that the design and construction of new buildings, as well as work done on existing buildings, meets targets designed to limit the associated CO 2 emissions from the building following its construction or modification. Below is a guidance table of U-values to help comply with Part L 2013 Building Regulations. New Build Existing Buildings Domestic Notional Value/Backstop Non-Domestic Notional value/ Backstop New Thermal Element e.g. Extensions Existing Thermal Element e.g. Garage Conversions Walls 0.18 / / Floors 0.13 / / Pitched Roofs 0.13 / / Flat Roofs 0.13 / / Scotland Section Section 6 of the Scottish Building Regulations is the Technical Handbook that deals with Energy within the built environment. Section 6 supports the Climate Change (Scotland) Act 2009 as it seeks to meet the target of an 80% reduction in carbon emissions by 2050 by ensuring that effective measures for the conservation of fuel and power are taken with constructing new or modifying existing buildings. Below is a guidance table of U-values to help comply with Section Building Regulations. New Build Domestic Notional Value/Backstop Non-Domestic Notional Value/ Backstop Zone Heated & Naturally Ventilated Non-Domestic Notional Value/ Backstop Zone Heated & Mechanically Ventilated/Cooled *Value required for extensions when houses have a reasonable standard of insulation Domestic New Thermal Element e.g. Extensions Existing Buildings Walls 0.17 / / / / 0.22* 0.30 Floors 0.15 / / / / 0.18* 0.25 Pitched Roofs 0.11 / / / / 0.18* 0.25 Flat Roofs 0.11 / / / / 0.18* 0.25 Domestic Existing Thermal Element e.g. Garage Conversions Wales Part L 2014 Historically, Part L, the Approved Document for the Conservation of Fuel and Power, applied to Wales and England. In 2014 this changed and the Welsh Government has issued their own version of Part L for use in Wales which came into force on 31st July Part L ensures that the design and construction of new buildings, as well as work done on existing buildings, meets targets designed to limit the associated CO 2 emissions from the building following its construction or modification. Domestic Notional Value/ Backstop New Build Non- Domestic Notional value/ Backstop New Thermal Element Retained Thermal Element Existing Buildings New Thermal Elements Domestic in Character New Thermal Elements Other Domestic buildings Walls 0.18 / / Floors 0.13 / / Roofs 0.13 / / Ceiling Retained Thermal Elements 9 Concrete Soffit Floors Liner Specification Guide

10 U-value Tables U-value calculations: Concrete Soffit Liner using Direct Fix Concrete Soffit Liner - Direct Fix Stainless Steel Fixings* Celotex SL5000 fixed directly to the underside of 150mm concrete slab using stainless steel fixings Product Code Concrete Soffit Liner - Direct Fix Thermally Broken Fixings* U-value calculations: Concrete Soffit Liner using Indirect Fix Concrete Soffit Liner - Indirect Fix Stainless Steel Fixings* U-value SL SL SL Celotex SL5000 fixed indirectly to the underside of 150mm concrete slab via treated timber battens using stainless steel fixings Product Code U-value SL SL SL Celotex SL5000 fixed directly to the underside of 150mm concrete slab using thermally broken fixings Product Code Concrete Soffit Liner - Indirect Fix Thermally Broken Fixings* U-value SL SL SL Celotex SL5000 fixed indirectly to the underside of 150mm concrete slab via treated timber battens using thermally broken fixings Product Code U-value SL SL SL *Stainless steel fixings were used to achieve these U-values. U-value may vary depending on the type of fixing specification. For project specific U-value calculations, please contact the Celotex Technical Centre. *Thermally broken fixings were used to achieve these U-values. U-value may vary depending on the type of fixing specification. For project specific U-value calculations, please contact the Celotex Technical Centre. The Online Celotex U-value Calculator allows you to specify your desired U-value before immediately calculating the required insulation thickness & product solution. Quick & easy to use, visit celotex.co.uk to find out more. 10 Concrete Soffit Floors Liner Specification Guide

11 Design Considerations and Installation Guidelines Design Considerations for Celotex SL5000 Celotex insulation can be used to insulate floors above an unheated space. Floors over an unheated space When a concrete slab separates a heated space above from an unheated space below, the direction of heat loss is downwards. In this instance Celotex SL5000 can be positioned directly under the concrete soffit with little risk of interstitial condensation. The position of the insulation increases the thermal capacity of the building and may assist with maintaining a steady internal temperature. Thermal Performance U-values The tables on page 10 demonstrate how Celotex SL5000, both directly and indirectly fixed, can contribute to meeting the energy conservation requirements outlined in the Building Regulations (See page 9). Linear Thermal Bridging Building Regulations require building designers to consider heat loss through construction junctions. Approved Document L clarifies the requirement: The building fabric should be constructed so that there are no reasonably avoidable thermal bridges in the insulation layers caused by gaps within the various elements, at the joints between elements, and at the edges of elements such as those around window and door openings Similar performance standards are required in Scotland and Northern Ireland. As insulation standards continue to evolve, it has become increasingly critical to consider heat loss in these areas. Accredited Construction Details (ACDs) for England & Wales, Scotland and Northern Ireland provide practical guidance on meeting this requirement. The documents provide approved design details for junctions within many common constructions. Where work is being undertaken in an existing building for example extensions, the requirement can be met by adopting the designs given in Accredited Construction Details. Celotex CF5000, full fill cavity wall insulation Screed Where a new building is being constructed, heat loss through each junction is considered as part of the whole building carbon dioxide emissions calculation. Using improved junction detailing will allow buildings to more easily meet the requirements of the Building Regulations. Heat loss through each junction is represented by the psi (ψ) value. Where ACDs have been adopted then a default ψ value may be used for each junction. Junctions can also be individually modelled by a competent person and the ψ value calculated. This value can be used directly in the whole building calculation. This approach will allow easier compliance and promotes strong fabric performance of the building. Celotex thermal bridging models have low psi values and can prevent condensation from forming to ensure that mould growth does not occur. Find out more at celotex.co.uk Celotex SL5000, concrete soffit liner insulation 11 Concrete Soffit Floors Liner Specification Guide

12 Installation Guidelines for Celotex SL5000 Construction factors will determine the recommended soffit liner application, with typically two types of application methods. Direct fix and indirect fix installation. Direct Fix Application Diagram 1 Direct Fix Concrete slab Direct fix installation refers to the fixing of Celotex SL5000 direct in to the concrete. This type of fixing is recommended when there is limited ground to soffit height, reduced surface mounted services and a regular concrete soffit (although limited adjustment can be achieved by adjusting the tightness of the fastenings). Installation Celotex SL5000 is intended for installation on the cold side of the construction. Ensure that the cavity wall insulation is continuous past the level of soffit insulation, avoiding thermal bridging. It is recommended that the Celotex insulation boards are tightly butted to minimise heat loss through insulation gaps, ensuring a professional finish is achieved. Continuity of butted insulation (including 6mm calcium silicate) is crucial in creating an effective fire barrier. Fixing Directly fix Celotex insulation to concrete soffit. Fixings should be installed 50mm (minimum) from the edge and corners of the board with a minimum of 12 fixings per 1200mm x 2400mm board (see diagram 2). Fixings should comprise a screw type suitable for the concrete deck into which it is being driven, combined with a circular or rectangular plate washer having a diameter of no less than 25mm. Advice on suitable fixings should be sought directly from the fixing manufacturer. Pre-drill Celotex SL5000 insulation and concrete to a depth as recommended by the fixings manufacturer, insert the fixing and screw tight to the line and level. Care should be taken when applying fixings to eliminate structural damage to the construction build-up. The Celotex Technical Centre can provide technical guidance. Celotex SL5000 Diagram 2 Fixing Centres For more information please contact the Celotex Technical Centre on or technical@celotex.co.uk Fixing Minimum 50mm 12 Concrete Soffit Floors Liner Specification Guide

13 Indirect Fix Application Diagram 3 Direct Fix Indirect fix installation refers to using timber battens as a counter layer between the insulation and the concrete soffit. This type of fixing is recommended when there is the requirement to create line and level due to an uneven nature of a concrete soffit. Installation Celotex SL5000 is intended for installation on the cold side of the construction. Ensure that the cavity wall insulation is continuous past the level of soffit insulation, avoiding thermal bridging. It is recommended that the Celotex insulation boards are tightly butted to minimise heat loss through insulation gaps, ensureeing a professional finish is achieved. Continuity of butted insulation (including 6mm calcium silicate) is crucial in creating an effective fire barrier. Indirect soffit fix should use timber battens treated to BS 5268: Part 5. Batten Fixing Fix Celotex insulation to 38mm x 50mm treated timber fixing battens. Battens should be fixed above the layer of SL5000. (Ensure that the timber fixing battens are secured at maximum 600mm centres and that the fixings through into the concrete soffit are at nominal 400mm centres). Insulation fixings should penetrate the timber battens by 30mm (see diagram 3). Please refer to manufacturers recommendations. Insulation Fixing Pre-drill Celotex SL5000 insulation and concrete to a depth as recommended by the fixings manufacturer, insert the fixing and screw tight to the line and level. Fixings should be installed 50mm (minimum) from the edge and corners of the board. Suitable fixings (a minimum of 12 fixings per 1200mm x 2400mm board) installed at nominal centres shown in diagram 4, should comprise a suitable screw type, combined with a circular or rectangular plate washer having a diameter of no less than 25mm. Advice on suitable fixings should be sought directly from the fixing manufacturer. Diagram 4 Fixing Centres For more information please contact the Celotex Technical Centre on or technical@celotex.co.uk Minimum 50mm Care should be taken when applying fixings to eliminate structural damage to the construction build-up. The Celotex Technical Centre can provide technical guidance. 13 Concrete Soffit Floors Liner Specification Guide

14 Tesco Extra, Woolwich Central 14 Floors Specification Guide

15 General Information Storage Celotex insulation boards should be stored dry, flat and clear of the ground. Only as much material as can be installed during a single working period should be removed from storage at any one time. If boards are stored under tarpaulins, care should be taken to prevent rope damage to boards. Installation Always install Celotex insulation boards in accordance with the instructions supplied by Celotex. Celotex insulation boards should not be installed when the temperature is at or below 4 C and falling. Where possible, cut the product using the Celotex Insulation Saw to minimise dust creation. When cutting Celotex insulation, dust extraction equipment, eye protection and face masks should be provided. Dust or particles in the eyes should be washed out with liberal quantities of water. If skin is sensitive to fibre irritation, apply a barrier cream to exposed areas before handling. Handling Care should also be taken to ensure that packs are not dropped on to corners or edges. Aluminium foil edges may be sharp. Avoid sliding bare hands along board edges. 15 Concrete Soffit Floors Liner Specification Guide

16 Find out more at celotex.co.uk Follow us on Team up with us on Like us Celotex, Lady Lane Industrial Estate, Hadleigh, Ipswich, Suffolk, IP7 6BA T: E: Date of publication: November Floors Specification Guide