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Celotex Thermaclass Cavity Wall 21

£86.45 ex. VAT

£103.74 inc. VAT

Product Total-Sub Cost: 

Total Meterage: 

Size Price
90mm x 450mm x 1190mm (pack of 6) £93.54
115mm x 450mm x 1190mm (pack of 5) £103.74
140mm x 450mm 1190mm (pack of 4) £102.14


The Celotex Thermaclass Cavity Wall 21 Board 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 ensure a continuous layer of insulation to maximise thermal performance as well as providing protection from wind driven rain.

Product Highlights
Lightweight Tongue and groove edge profile Low emissivity foil facing BBA approved – certificate 16/5343 (Full Fill Cavity Walls) Reaction to Fire: Euroclass E Reaction to Fire classification, according to EN 13501-1



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