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Rafterloc is an easy and robust way to insulate pitched roofs

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Xtratherm has launched a new product for insulating pitched roofs that provides a robust and userfriendly way to improve the thermal performance of a building.

Rafterloc is a polyisocyanurate (PIR) foam that is installed concertina style between rafters on the slope of the roof. The system features a slotting mechanism that allows the boards to lock between the rafters, ensuring a tight fit.

Rafterloc is available in 360 and 565mm widths and 50 and 100mm thicknesses. Each panel has a width variation of 20 - 30mm to allow a tight fit between the rafters.

Rafterloc therefore avoids most problems with discrepancies in timber widths and spacings that can result from standard-size insulated board.

PIR, used in the manufacture of Rafterloc, has a closed-cell rigid foam construction that offers excellent insulation properties. This allows PIR to achieve one of the lowest Lambda Values of any insulation material and therefore energy efficient roof systems can be achieved with the minimum of thicknesses – a single layer of Rafterloc may be sufficient. However for buildings that require even better U-values Rafterloc is recommended to be used in combination with Xtratherm Pitched Roof Board Thin-R below the rafter, which also reduces thermal bridging.

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