T-Barrier System. Timber Frame Applications. Satisfying Fire, Thermal and Acoustic Requirements at the Combined Party Wall and Pitched Roof Junction

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1 T-Barrier System Timber Frame Applications Satisfying Fire, Thermal and Acoustic Requirements at the Combined Party Wall and Pitched Roof Junction

2 The Problem: Thermal Bypass Without effective edge sealing, the party wall cavity allows heat to escape. The image (right) highlights the areas of heat loss in a row of terraced houses. Of particular note is the heat loss at the top of the junction where the party wall cavity meets the external cavity. The Solution The ARC T-Barrier System dramatically reduces heat loss along the edges of the party wall, enabling a zero U-value to be achieved (see below table). Party Wall Construction Solid 0.0 Unfilled cavity with no effective edge sealing 0.5 Unfilled cavity with ARC T-Barrier System around all exposed edges and inline with insulation layers in abutting elements A fully filled cavity with ARC T-Barrier System at all exposed edges and inline with insulation layers in abutting elements U-value (W W/m 2 K) Key Benefits of ARC T-Barrier System Zero U-value at party wall can be achieved Up to three times more effective as an edge seal than conventional systems Simplified installation when compared to conventional systems Reduces sound transmission between the dwellings and within the cavity Minimises thermal bypass Available to suit both masonry and timber frame applications Edge Seal Effectiveness The effectiveness of ARC T-Barrier as an edge seal has been independently tested by Leeds Beckett University. The test replicated real life conditions by measuring the differentials between pressurised and non-pressurised cavities. This ground-breaking test is the only effective test available currently to measure a products effectiveness as an edge seal. ARC T-Barrier was found to provide three times the pressure differential compared to a conventional cavity barrier system, and nearly twice the pressure differential of the Airtightness Membrane employed by some house builders Satisfies NHBC Chapter 7.2 D13 Junctions between roofs and compartment or separating walls shall adequately resist fire spread. 0 Party Wall DPC Airtightness Membrane ARC T-Barrier Results presented were obtained using a 100mm party wall cavity with a 100mm external cavity. 2

3 Tile Batten Barrier T-Barrier Pitched Roof T-Barrier Vertical Soffit Barrier What is ARC T-Barrier System? The ARC T-Barrier System has been developed to create an effective edge seal around the party wall cavity and to provide a complete fire barrier between two dwellings, both in the vertical cavity and the cavity between the pitched roofs. By creating an effective edge seal around the party wall cavity, the ARC T-Barrier System helps to achieve a zero U-value at the party wall. The system also provides a simple solution for complying with NHBC Chapter 7.2 D13 Junctions between roofs and compartment or separating walls shall adequately resist fire spread. Introducing the Traffic Light System The ARC T-Barrier System is fitted as the build progresses, from ground level right up to the top of the roof pitch. ARC s unique Traffic Light System enables the correct product for the current stage of the build to be identified at-a-glance.

4 ARC T-Barrier Vertical Timber Frame Installed vertically at the party wall junction The ARC T-Barrier is designed to provide a fire, thermal and acoustic break at the junction between the external cavity and the party wall cavity. This minimises the effect of thermal bypass as well as reducing flanking noise in the cavity. The ARC T-Barrier provides up to 1 hour fire integrity in timber frame construction, and meets the Robust Detail s requirement for a barrier where a separating party wall meets an external cavity wall, significantly reducing sound transmission along the cavity. Key Facts Material Rockfibre mineral wool Thermal Conductivity 0.037W/mK Sleeve Material Polythene DPC Fitted No Standard Length 1.2m Fire Rating (Timber) Up to 1 hour The ARC T-Barrier Vertical Timber Frame is designed to be fitted vertically as the timber kit is erected, with a friction fit in both the external and party wall cavities. Care should be taken to ensure butt joints are compressed together as much as possible to ensure a tight fit without any gaps. Fit: As timber kit is erected ARC T-Barrier Pitched Roof Installed up the roof pitch above the party wall blockwork The ARC T-Barrier Pitched Roof is designed to provide a fire, thermal and acoustic barrier between the top of the party wall and the underslaters felt. The product is fitted along the length of the roof pitch, from soffit to apex ensuring an effective and consistent barrier. The ARC T-Barrier Pitched Roof is easily installed once the party wall structure is complete, with the unique T-shape being held in place by compression between the two leaves of the party wall. Key Facts Material Rockfibre mineral wool Thermal Conductivity 0.037W/mK Sleeve Material Polythene DPC Fitted No Standard Length 1.2m NHBC Chapter 7.2 S13 states that a separating wall should stop 25mm below the top of the adjacent roof trusses. ARC T-Barrier Pitched Roof is designed to compress within this gap, satisfying the NHBC recommendation for a mineral wool fire barrier. Fit: After party wall structure is complete, before roof membrane 4

5 ARC Tile Batten Barrier Installed above the roof membrane between the tile battens The ARC Tile Batten Barrier is designed to provide a fire, thermal and acoustic break at the party wall between the roof tiles and roof membrane, working in conjunction with ARC T-Barrier Pitched Roof to create a complete fire break at the separating wall. The ARC Tile Batten Barrier is supplied in 1.2m lengths allowing easy on-site handling and making for quick installation. The tile battens are nailed on top of the barrier, compressing it where the two cross. A knife is used to score the ARC Tile Batten Barrier, releasing the Key Facts compression and Material Rockfibre mineral wool allowing the barrier to recover to the full depth of the tile batten. Thermal Conductivity 0.037W/mK Material Thickness Material Width 30mm 300mm Standard Length 1.2m Fit: As tile battens are fitted ARC Soffit Slab Installed within the soffit and within any void above the external brickwork The ARC Soffit Barrier is designed to fill the void within the soffit, providing a fire, thermal and acoustic barrier between dwellings. The barrier is manufactured from rockfibre mineral wool, with a foil facing to ensure an effective smoke barrier is created. An exact fit can be created to form an effective barrier at this junction. Key Facts Material Thermal Conductivity Foil Facing Standard Dimensions Standard Thickness Rockfibre mineral wool 0.037W/mK Yes 450mm x 600mm 100mm Fit: During soffit installation 5

6 Technical Specifications The following technical specifications are common between all four barriers within the ARC T-Barrier System. Fire Properties The ARC T-Barrier System is manufactured using rockfibre mineral wool which achieves a fire classification of Euroclass A1 as defined in BS EN Thermal Properties ARC s rockfibre mineral wool insulation has a thermal conductivity of 0.037W/mK. Standards The rockfibre mineral wool used in the manufacture of ARC T-Barrier System conforms to BS EN and EN16001 Energy Management Systems. The DPC is manufactured in accordance with BS Storage and Packaging ARC Fire Barriers are supplied in polythene packs which are designed for transporting and protecting the products. It is not recommended that the packs are stored in direct sunlight as the polythene which encapsulates the barriers can be damaged. When storing the barriers for longer periods of time it is recommended the product should be stored indoors, or under cover. Environment ARC s rockfibre mineral wool has no CFCs or HCFCs involved in the manufacturing process and represents no known threat to the environment, and is classed as zero ODP and zero GWP. ARC T-Barrier System has a Green Guide rating of A+. Health and Safety ARC Building Solutions has an approved Health and Safety Policy and is committed to working and supplying products safely. ARC s rockfibre mineral wool is not classed as a possible human carcinogen. We have assessed products as required by Substances Hazardous to Health Regulations (COSHH). An ARC COSHH data sheet is available and can be downloaded from ARC s website. 6

7 ARC Traffic Light System: Specification & Installation Guide 1 ARC T-Barrier Vertical Timber Frame Fitted vertically at party wall junction Fitted as timber kit is erected Compression fit within external cavity Compression fit within party wall cavity Product Code Party Wall Cavity External Cavity Dimensions TBTF50/50 50mm 50mm 65/65 x 65/200 x 1200mm TBTF70/50 70mm 50mm 85/65 x 65/200 x 1200mm Fire Rating 1 hr 1 hr 2 ARC T-Barrier Pitched Roof Fitted across the pitch of the roof between the top of the party wall and the roof membrane Fitted after timber structure is completed and before the roof membrane is installed Friction fit within void between party wall and roof membrane Compression fit within party wall cavity Product Code Party Wall Cavity Void Thickness Dimensions TBR75/25 75mm 25mm 90/75 x 50/300 x 1200mm TBR100/25 100mm 25mm 120/100 x 50/300 x 1200mm TBR125/25 125mm 25mm 135/120 x 50/300 x 1200mm TBR150/25 150mm 25mm 160/120 x 50/300 x 1200mm 3 ARC Tile Batten Barrier Fitted across the pitch of the roof between the roof membrane and underside of roof tiles Fitted as the tile battens are fitted Tile batten is nailed on top of the ARC Tile Batten Barrier. The compressed barrier is then scored to allow it to recover to the full depth of the tile batten Product Code Dimensions TBB30 30 x 300mm x 1.2m 4 ARC Soffit Slab Fitted within the soffit fully closing any void Fitted during soffit installation Supplied in standard soffit width, simply cut roof angle to ensure correct fit Product Code SSL600/450 Dimensions 450 x 600 x 100mm 7

8 Why ARC? ARC Building Solutions are an independent manufacturer and distributor of specialist insulation products for the construction industry. Established in 2008, ARC specialises in cavity fire barriers and cavity closers. ARC is dedicated to providing excellent and impartial advice and support, both in terms of service and technical solutions. Our technical experts are on hand to identify the best solution for your requirements, while our production team are able to respond quickly ensuring even the most bespoke products can be delivered to site on time. Don t take our word for it, see our accreditation... MANAGEMENT SYSTEMS Assessed to ISO 9001 & ISO BRE Certificate No ARC have recently achieved ISO9001 and ISO14001 accreditation, assessed by BRE Global Ltd. ARC also holds third party accreditation from LABC and all fire barriers and cavity closers are manufactured to NHBC requirements. Get in touch t f w e sales@arcbuildingsolutions.co.uk ARC Building Solutions Unit H1/H2, Gildersome Spur, Leeds, LS27 7JZ 2015 ARC Building Solutions Ltd. ARC and T-Barrier are registered trademarks of ARC Building Solutions Ltd. V Whatever your enquiry, our friendly team are here to help.