Sarnafil Specification Guide

Transcription

1 Sarnafil Specification Guide

2 Roofing solutions for virtually any kind of building Whatever the scale, design or function of your next project, Sarnafil offers a single-ply roofing system to meet your exact requirements together with specification and design support from the start... Specify Sarnafil for peace-of-mind Sarnafil roofing systems are specified on many of the UK s most prominent and well-known buildings, as well as thousands of industrial, commercial, residential and other properties. Specification considerations Successful roof specification poses many questions: Does the product contribute to sustainable construction? How do I design the roof to maximise compliance with Building Regulations Part L 2006? Does the supporting structure place weight restrictions on the roof? How can the roof be drained most effectively? What detail considerations are there? Which system is most suited to the project? This specification guide will provide you with some of the answers to these and other questions. Detailed specification and design support for specific projects is provided through our nationwide network of Technical Advisers who, in turn, draw on the resources of our in-house Technical Services team, to provide the optimum specification. Sarnafil single-ply roofing benefits Sarnafil roofing systems offer a variety of benefits, including: Proven long term performance Low life cycle costs Excellent design versatility Superior aesthetics Ease of installation Industry leading guarantees Cold applied attachment systems Suitable for existing roof overlays, subject to survey 2

3 You ll find Sarnafil single-ply roofing on all kinds of buildings, from distribution centres like this IKEA depot in Doncaster, to commercial properties, historic buildings and private homes. Performance/efficiency 4 Design/aesthetics 6 Installation advantages 8 Roofing systems overview 10 Support 12 Top: IKEA Distribution Centre, Doncaster Architect: Burkes Green Architects Roofing Contractor: Roofdec Ltd Client: IKEA Left: Norwich Castle Roofing Contractor: Briggs Roofing and Cladding Ltd Client: Norwich City Council Bottom left: Hills Road, Cambridge residential Roofing Contractor: Roofing Contractors (Cambridge) Ltd Client: Private Client Bottom right: Gold Lane Housing Development, Harrow Architect: Audley English Associates Roofing Contractor: Miller Roofing Ltd Client: Notting Hill Housing Trust 3

4 Sarnafil roofing was specified for the roof on this innovative conversion of a Suffolk Martello Tower. This historic building is now a highly individual private home. The roof has been designed to withstand high wind loadings resulting from the building s exposed coastal position. Architect: Piercy Conner Roofing Contractor: Cambridge Polymer Roofing Ltd Client: Duncan Jackson Proven performance and lower whole life costs British Board of Agrément certification states: All available evidence indicates that the Sarnafil Roof Covering System should have a life in excess of thirty years. In fact, Sarnafil roofs are still performing after over forty years. Advanced polymer technology increases membrane life The first Sarnafil roofs were installed more than forty years ago, with early examples still providing reliable protection today. Since that time independent testing has repeatedly confirmed Sarnafil s membrane formulation as the best in the industry, with Sarnafil products withstanding the test of time in every conceivable climate. Optimised performance With Sarnafil, the performance of your roof against wind uplift is guaranteed. As part of the specification process Sarnafil calculates the roof wind loading using bespoke software to provide calculations that are covered by our Design Insurance. SarnaTherm insulation performance plus In addition to meeting demands for lower U Values, Building Regulations Part L/J now require designers to consider both air leakage and the thermal transmittance of penetrating elements (thermal bridging). This integrated approach to better management and conservation of energy is reflected in Sarnafil s system approach to roofing. The wide range of SarnaTherm insulation options, available to suit virtually any application or roof construction, can assist the construction industry in meeting the government s commitments to the Kyoto Protocol. When specifying SarnaTherm Sarnafil Technical Advisers will also take additional factors, such as fire ratings and acoustic performance, into consideration. Acoustic performance The flexibility of on-site construction enables Sarnafil roofing systems to accommodate most acoustic requirements for a building, for both internal and external sources. Fire performance Sarnafil membranes are self extinguishing on all common insulants and meet the Building Regulations requirements for external fire spread resistance, enabling the specifier to meet the client s insurance demands without compromising on aesthetics, acoustics or installed cost requirements. Many of the Sarnafil systems are also LPCB and Factory Mutual tested and approved. 4

5 Lower whole life costs Durability and low maintenance are two key factors in any whole life cost assessment. With a BBA Certified life expectancy of in excess of 30 years, and minimal maintenance requirements, Sarnafil membranes consistently demonstrate a low whole life cost when calculated using the Whole Life Cost Forum methodology. Above: South Gyle Crescent, Edinburgh Sarnafil roofing played a part in this building achieving an outstanding result in a whole building pressurisation test. Architect: Michael Laird Partnership Roofing Contractor: Miller Roofing Ltd Right: SarnaTherm insulation This is just a selection from the wide range of insulation boards which form an intrinsic part of our roofing systems. 5

6 Realise your vision with Sarnafil Flat, pitched, domed, vaulted...new build or refurbishment... whatever the roof type, Sarnafil roofing offers huge scope for the specifier to create a roof with aesthetic appeal to match its high performance. Versatile performance In roofing applications where aesthetics are important, Sarnafil roofing systems offer the specifier almost unlimited creative freedom. They can be applied to virtually any roof shape or construction and are equally suitable for contemporary or traditional designs. Colour range Sarnafil membranes are available in a range of colours. Some of these have been formulated to reproduce the appearance of various forms of traditional metal roofs. Clean lines with no visible fixings Where the roof soffit may be visible below, visible fixings can be undesirable. Sarnafil s fully adhered system is the ideal solution for this application and provides a clean, uninterrupted roof surface. Respecting tradition Sarnafil Decor and Batten profiles provide the specifier with the opportunity to reproduce the appearance of traditional metal roofs. Traditional lead batten roll, copper and modern standing seam roofs can all be realistically reproduced. These products have been used to stunning effect in the refurbishment of many historic and listed buildings. Roof Graphics Sarnafil membranes can be supplied in special colours to order (subject to quantity). These can be cut to form graphics or logos which can be heat welded onto the existing Sarnafil roof. This provides a high impact promotional or brand-building opportunity for building owners whose premises are overlooked or on a flightpath. Sarnafil roofing membrane standard colour range Light Grey Lead Grey Copper Patina Pearl Copper Metallic Copper Brown Azure Blue Traffic White 6

7 Sarnafil s fully adhered system facilitated the unusual waveform structure of the roof at the Robin House Childrens Hospice in Balloch, Scotland. Architect: Gareth Hoskins Architects Roofing Contractor: Miller Roofing Ltd Client: Childrens Hospice Association Scotland Green roofing The use of plants or greening on roofs can be dated back to the Hanging Gardens of Babylon, a typical example of this type of roofing being used for amenity and aesthetic reasons. More recently, green roofs have been used for both aesthetic and environmental reasons, with the green roof replacing the green footprint lost by the erection of the building. Today, the significant contributions of the green roof towards sustainable drainage systems are increasingly being recognised. Sarnafil s SarnaVert system provides options for biodiverse, extensive and intensive green roofs and enables the specification of hybrid systems to suit local environmental and design requirements. Above right: Grenfell Island, Maidenhead Architect: Fookes Partnership Roofing Contractor: Briggs Roofing & Cladding Ltd, Stratford Below right: Swan House, Newcastle upon Tyne Architect: Ryder Roofing Contractor: Chemplas Ltd 7

8 Practical site advantages start here Sarnafil Roofing Systems are designed to reduce installation time and minimise any risk of incorrect installation. On completion for guarantee, all Sarnafil roofs are inspected by our Applications Department the same team that trained the installers. Sarnafil installed by experts Sarnafil installation is part of our carefully managed Quality Management System and is carried out by Sarnafil trained installers. Field Technicians from our Applications Department provide training for the roofing installers, inspect projects during installation and have responsibility for inspecting the completed project for guarantee. Faster installation Speed of installation is an important Sarnafil advantage, reducing site time, associated costs and inconvenience. By their nature, single-ply roofing systems are less labour intensive than traditional roofing methods. However, Sarnafil has developed products and procedures to further streamline the installation process. Our Sarnamatic 661 plus welding machine operates at up to 3.6 metres per minute. That s twice the speed of previous models and up to four times the speed of hand welding. Sarnamatic welding also ensures that critical parameters such as heat and speed can be set correctly for all variations of membrane thickness, to ensure a perfect weld every time. To maximise the Sarnamatic advantage, our Sarnafast system provides a complete high-speed fastening solution for flat roofs. With this system, membrane sheets are fastened on one side, using thermally broken fasteners. Overlaps are then welded using a Sarnamatic. The Sarnafast system offers speed, security, economy of installation and superior fastener performance. These features mean that Sarnafast systems typically require half the number of fasteners of conventional lap fastened systems. Excellent safety Unlike many traditional bituminous roofing systems, Sarnafil roofing systems are cold applied, removing the risks asociated with naked flames and high temperature liquids on-site. Less disruption In applications where noise is a concern, our fully adhered roofing systems can be installed with limited noise and disruption compared to the installation of fasteners. In many refurbishment projects, due to the vapour permeability of the membrane, Sarnafil roofing systems can be applied over the existing substrate (subject to survey), allowing the building to remain in use during refurbishment, saving time and money. 8

9 Sarnafil membrane seams can be welded by hand, or automatically, using our Sarnamatic 661 plus high-speed welding machine. Sarnafil roofs are installed only by Sarnafil trained contractors Procedures are tightly controlled, with regular site visits by experienced staff from Sarnafil s Applications Department - the same team that provided initial training for the contractors installers. Only after inspection by the Applications Department can a Guarantee certificate be approved for issue. Above: Rolling out the membrane and checking the correct overlaps prior to welding Top right: Fastening insulation with thermally broken fasteners Above right: Peel stop installation with thermally broken fasteners 9

10 Sarnafil offers a complete range of roofing systems to suit all kinds of roof designs and to meet a wide variety of different criteria, from aesthetics and design considerations to installation requirements on-site. Right: RSSL Building, Reading University Architect: Baker Consulting Services Roofing Contractor: Midland Single Ply Roofing Ltd Client: Reading University Roofing systems overview Sarnafil roofing systems fall into four broad categories: mechanically fastened, adhered, ballasted and green roofs. Within these different roof types there are a number of options to suit almost every kind of construction and design requirement. Key to diagrams: 1. Sarnafil membrane 2. SarnaTherm insulation 3. Sarnavap vapour control layer 4. Structural deck 5. Sarnafelt or protection sheet 6. Ballast 7. AquaDrain 8. Moisture retention fleece 9. Growing medium & Planting 3 Sarnafast Mechanically Fastened System The Sarnafast System offers speed, security and economy of installation in applications which provide regular fixing centres, including profiled steel decks. Ideal for applications with the following criteria: Location subject to high winds Large roof area Fastrack installation requirement 1 Impracticality of adhered attachment Sarnabar Mechanically Fastened System 1 The Sarnabar System features linear fastening bars which are attached at right angles to the direction of the membrane. This versatile system is ideal for use when fixing points are dictated by existing timber joists or channel reinforcement, or for use on concrete roofs where the Sarnafast system is less practical. Ideal for applications with the following criteria: Location subject to very high winds Concrete Deck Irregular or bespoke design Impracticality of adhered or Sarnafast attachment

11 Sarnafil Adhered Systems These fall into two categories. Fully Adhered Systems, in which all elements within the roof build-up above the deck are adhered to each other; and Composite Adhered Systems in which the membrane is adhered to a thermal insulation board that is mechanically fastened to the structural deck. Suitable for applications with the following criteria: Superior aesthetics Reduced noise during installation Impracticality of mechanical fastening High humidity in building below Complex roof shapes Sarnafil Ballasted Systems This broad range of roofing solutions is characterised by an additional top layer of stone ballast or concrete pavers which secure the loose-laid waterproofing membrane. Ballasted roofs can be of either warm roof construction (shown above), or inverted construction with moistureresistant insulation. Sarnafil Ballasted Systems are typically chosen for the following reasons: Fire requirement Access and amenity Protection Acoustics Rain noise reduction SarnaVert Green Roof Systems These are ballasted roofs in which the ballast provides a planting medium. Green Roof Systems are popular for a variety of reasons: Adaptation of building to its environment Pleasing aesthetics Reduced load on drainage Provision of habitat for wildlife Improvements in local climate heat reflection, solar radiation absorption, oxygenation and increased humidity Extended waterproofing life Additional energy saving Improved sound insulation 11

12 Draw on our knowledge and expertise Sarnafil offers a comprehensive range of information and support resources for architects, contractors and other specifiers, including: Experienced Technical Advisers, who can help you to develop specifications Comprehensive technical literature Scaleable, layered CAD detail drawings available to download free on-line at Sarnafil is the complete single-ply roofing specialist: New installations Refurbishment CPD Seminars Complete choice of systems Specification and design support Surveys and site inspections Installer training Comprehensive guarantees ISO 9001:2000 quality management system ISO environmental management system For further information about Sarnafil products and services, please call us on or visit our website. Sarnafil Ltd., Robberds Way, Bowthorpe, Norwich, NR5 9JF, United Kingdom APPROVED The Single Ply Roofing Association (SPRA) represents membrane manufacturers, associated component manufacturers and specialist sub contractors and aims, through a quality assured partnership, to ensure the delivery of best value single ply roofing systems. By specifying products and specialist installation by SPRA Manufacturer, Associate and Contractor members you can be assured that all parties meet strict quality criteria. Compliance with these criteria and with the Code of Conduct is assessed at application, by annual audit and by random spot checks. For further information, and to obtain copies of the SPRA Design Guide and other documents, go to or call Tel: Fax: roofing@sarnafil.co.uk A Sika Group Company Serial no. BP/SSG1/0906/10K Printed on paper from sustainable forests