Polyfoam Roofboard Extra
Description
Polyfoam Roofboard Extra is a rigid extruded polystyrene (XPS) board with a low Global Warming Potential (GWP) and zero ozone depletion potential (ODP).Polyfoam Roofboard Extra is a lightweight, lap jointed board with high compressive strength (300 kPa).‎ Polyfoam Slimline Zero Membrane is a high performance, thermally bonded tri-laminate of polypropylene; spunbonded (outer layers) and microporous (inner layer)
Product Benefits
- - Excellent thermal performance
- - 15mm lap joint
- - High compressive strength
- - Highly resistant to water absorption
- - Able to resist repeated freeze/thaw cycles
- - Lightweight and easy to install
- - Tough and durable, not easily damaged
- - Dimensionally stable
- - Thermal performance of an inverted roof is improved when used in conjunction with ‎Polyfoam Slimline Zero Membrane
Product Application
Polyfoam Roofboard Extra is used for the thermal insulation of a wide variety of flat roofs including:
– in an inverted roof below ballast or paving slabs
– in a green/garden roof
Flat Roof
(Inverted roof)
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Flat Roof
(Conventional warm roof)
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Technical Specification
The declared thermal conductivity of Polyfoam Roofboard Extra is 0.031W/mK.
The design thermal conductivity in including moisture correction factor, of the boards, is 0.032W/mK for thicknesses 50mm and above. For thicknesses under 50mm it is 0.033W/mK.
The water vapour resistivity of Polyfoam Roofboard Extra is 705 MNs/g.m when tested in accordance with BS EN 12086.
Polyfoam Roofboard Extra has a moisture absorption of 0.9% by volume when tested in accordance with EN 12087.
The BRE have approved and issued Environmental Product Declarations (EPDs) for the Polyfoam range of products in accordance with EN 15804:2012+A1:2013.
Polyfoam Roofboard Extra represents no known threat to the environment and has Zero Ozone Depletion Potential and a low Global Warming Potential. Polyfoam Roofboard Extra is non bio-degradable and 100% recyclable.
Proudly made in Britain with green focused credentials
Polyfoam XPS Ltd is a leading manufacturer of closed cell, extruded polystyrene insulation. The Polyfoam range is lightweight, strong, moisture resistant and easy to cut and shape, providing thermal performance and strength for the lifetime of the building.
Manufactured in the UK using a blowing agent with low global warming potential (GWP) and zero ozone depletion potential (ODP), Polyfoam XPS products are free from CFCs and HCFCs.
They have Environmental Product Declarations (EPDs) and raw material procurement is certified to BES 6001 (Responsible Sourcing of Construction Products).