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    Flat RoofsRoofing Membranes, Felts, VCLs

    Product Type:

      Membranes & Papers

    Market Sector:

      Building, Roofing

    Ravatherm UK Polyfoam Slimline Membrane (44P)

    Product Description:

    For use as a separating and filtration layer in low moisture impact protected membrane flat roofs.


    Polyfoam Slimline membrane is a high performance, non-woven polyethylene geotextile membrane that acts to resist the passage of water, but is vapour permeable.

    It is used in combination with Polyfoam Roofboard as part of the Polyfoam Slimline System for protected membrane roofing.


    Polyfoam Slimline is for use as a separating and filtration layer in low moisture impact protected membrane flat roofs. The water resistant properties of Polyfoam Slimline membrane result in it reducing the flow of water through the roof construction. This means that the normal impact on thermal performance by rainwater cooling is negated compared with using a standard filtration membrane.

    This has been confirmed in tests carried out by the British Board of Agrément, as part of the third party certification of the Polyfoam Slimline System.

    As the Polyfoam Slimline membrane is vapour permeable, moisture does not become trapped in the insulation layer, but can evaporate up through the Polyfoam Slimline membrane.

    The use of Polyfoam Slimline offers superior thermal performance – so by using the same thickness of Polyfoam Roofboard you can achieve superior U-values.


    • Improves the thermal performance of protected membrane flat roofs
    • Waterproof but vapour permeable
    • Enables thinner insulation and less ballast to be used with no loss of performance
    • BBA Approved


    M4 Product Table

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