STYROFOAM™ has been manufactured by Dow for more than 60 years. The process of extruding foamed polystyrene results in a material with uniformly small, closed cells, a smooth ‘skin’ and an unrivalled set of properties which make it the choice of specifies in a wide range of demanding insulation applications: low thermal conductivity - minimizing the board thickness needed to achieve a specific U-value, thus allowing the designer greater flexibility. high compressive strength - in load-bearing applications, the closed cell structure gives the foam great rigidity and makes it highly resistant to compression. low water absorption - STYROFOAM has natural resistance to rain, snow, frost and water vapor which makes it an exceptionally stable material, retaining its initial insulation performance and physical integrity in exposed conditions over the very long term. It was this unusual property that made possible the inverted warm roof concept, pioneered by Dow. workability- STYROFOAM is easily worked with normal hand tools. hygiene - STYROFOAM boards have low susceptibility to rot and mould or fungal growth is therefore minimized. They are clean, odorless and free from irritating dust. STYROFOAM is available in a number of different grades designed to meet the performance requirements of specific applications. Each construction project has its own unique combination of insulation requirements. Developing an accurate insulation project specification can be a time-consuming process. However, the designer now has available a range of fast-track templates in the form of STYROFOAM Solutions. Authority STYROFOAM™ is manufactured under a BS EN ISO 9001:2001 Quality Assurance System (BSI Certificate Q05968). BS EN ISO 9001 Certification-STYROFOAM products comply with BS EN 13164: 2001 Thermal insulation products for buildings. STYROFOAM products comply with BS EN 13164: 2001 Thermal insulation products for buildings - factory made products of extruded polystyrene (XPS) - specification. STYROFOAM products have been evaluated by the British Board of Agreement and certified as suitable for use in: Floors (Certificate 92/2782) Pitched roofs - warm roof concept (Certificate 87/1836) Inverted roofs (Certificate 97/3431) Environmental Concern about ozone depletion in the stratosphere has led to international agreements to phase out the use of ozone-depleting chemicals. All STYROFOAM™ products are hydro chlorofluorocarbon (HCFC) free and comply with the requirements of EC Regulation No 2037/2000 (1 Oct 2000) on substances which deplete the ozone layer. STYROFOAM `X’ products are foamed with a hydro fluorocarbon (HFC) and `A’ products with carbon dioxide. Technical Description Surface characteristics Dow STYROFOAM™ boards are blue. All boards have a smooth homogeneous skin on both sides with the exception of PRIMATE™ DI-A. The surface of STYROFOAM LB-X is planed Performance Structural STYROFOAM™ boards are available in a range of compressive strengths to suit different load bearing requirements. Fire Information on aspects of fire performance of extruded polystyrene in building applications is given in BS 6203: 1991, 'Fire characteristics and fire performance of expanded polystyrene materials used in building applications'. STYROFOAM products contain a flame retardant additive to inhibit accidental ignition from a small fire source, but they are combustible and if exposed to an intense fire may burn rapidly. During shipment, storage, installation and use STYROFOAM products should not be exposed to flames or other ignition sources. Fire classification is based on small scale tests which may not reflect the reaction of the product in its end use state under actual fire conditions. STYROFOAM products should, when installed, be adequately protected from direct exposure to fire. STYROFOAM products achieve Euro class E (reaction to fire). Temperature Polystyrene products will melt when brought into direct contact with high temperature heat sources: for Dow STYROFOAM boards the recommended maximum working temperature is 75°C. Water/Moisture STYROFOAM is highly resistant to water absorption. STYROFOAM boards are very resistant to the passage of water vapor and are unaffected by repeated freeze/thaw cycles. Biological STYROFOAM has low susceptibility to rot: mould or fungal growth is therefore minimized. Chemical STYROFOAM boards are resistant to most commonly occurring construction materials such as lime, cement, plaster, anhydrous gypsum, solvent-free bituminous compounds, water-based wood preservatives, as well as alcohols, acids and alkalis. Certain organic materials such as solvent-based wood preservatives, coal tar and derivatives (creosote), paint thinners and common solvents such as acetone, ethyl acetate, petrol, toluene and white spirit will attack STYROFOAM, resulting in softening, shrinkage and even dissolution, with a consequent loss of performance. The use of solvent-free adhesive is recommended. Advice on compatibility with polystyrene foam should be sought from the adhesive manufacturers prior to application. Sunlight Protect STYROFOAM from prolonged exposure to intense sunlight to prevent degradation of the surface of the board. Durability Properly installed, STYROFOAM boards have a service life comparable with the building or structure. Environmental STYROFOAM is not bio-degradable in the environment and does not present an environmental hazard in the water/soil compartment. Disposal STYROFOAM can be:recycled mechanically. - recycled chemically.- used as land-fill (no harmful effects). incinerated under control to recover the energy content .

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