The Celotex Thermaclass Cavity Wall 21 Board 1190 x 450 x 115mm (L x W x T) is an easy to install polyisocyanurate (PIR) insulation board that has a high thermal performance with a thermal conductivity of 0.021 W/m.K. Suitable for full fill cavity wa...

The Celotex Thermaclass Cavity Wall 21 Board 1190 x 450 x 115mm (L x W x T) is an easy to install polyisocyanurate (PIR) insulation board that has a high thermal performance with a thermal conductivity of 0.021 W/m.K. Suitable for full fill cavity wall applications, it can be installed with up to a 10mm residual cavity or as a full fill solution with no residual cavity. The board has a low emissivity foil facing to each side and features an engineered tongue and groove joint profile, helping to

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