Description
Celotex Thermaclass Cavity Wall 21 ? Advanced Partial-Fill Cavity Wall Insulation
Celotex Thermaclass Cavity Wall 21 is a premium partial-fill PIR insulation board designed specifically for masonry cavity walls. Engineered for outstanding thermal performance, Thermaclass 21 offers a ?-value of just 0.021 W/m?K?among the best in its class.
Featuring a low emissivity foil facing and tongue-and-groove edges, Thermaclass 21 minimises thermal bridging and air leakage, ensuring a tight, energy-efficient env
