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    Pitched Roofs - Rafter level

    Product Type:

      Expanded Polystyrene (EPS)

    Market Sector:

      Building, Roofing

    Thermal Economics Alreflex Raftertherm (90S)

    Product Description:

    Raftertherm, non-ventilated roof rafter insulation system. 

    Raftertherm provides distinct solutions for New Build and Refurbishment. The need for eaves and over rafter venting is eliminated in both cases and in the case of Refurbishment even the existing tiles and tile underlay can be retained. 

    The system employs two platinum EPS boards; one fitted between the rafters and one underneath them. Platinum is a graphite enhanced form of EPS, with improved insulation and strength properties.

    In addition, the bottom board has been laminate with the Alreflex low E foil, which forms an integral vapour and air pressure loss barrier as well as providing a further increase in the insulation value

    This foil barrier which eliminates the need for both eaves and over rafter venting.

    A proprietary metal bracket is used to facilitate the easy fitting of both the bottom board and the ceiling plasterboard.

    For New Build purposes the Alutherm foil breather membrane is used as the tile underlay, which helps to reduce the insulation thickness and the roof profile depth.

    The boards are supplied in varying thicknesses to suit U value requirements ranging between 0.20 to 0.16 Wm2/K

    It is also worth noting that as platinum EPS has zero OPD and Global warming potential.