90mm Celotex Thermaclass Cavity Wall 21 - 1190mm x 450mm

Celotex Thermaclass Cavity Wall 21 is a user-friendly polyisocyanurate (PIR) insulation board designed for full fill and partial fill cavity wall applications, boasting outstanding thermal performance with a thermal conductivity of 0.021 W/m.K. Enhanced with a low emissivity foil facing, it offers flexibility in installation, allowing for up to a 10mm residual cavity to accommodate mortar squeeze or for a full fill solution with no residual cavity. Its ease of installation and high thermal efficiency make it an excellent choice for cavity wall insulation projects.

Key benefits

• Good thermal performance: λ = 0.021 W/mK
• Lightweight 1190 x 450mm boards (installed dimensions) 
• Tongue and groove edge profile 
• Low emissivity foil facing 
• BBA approved – certificate 16/5343 (Full Fill Cavity Walls)
• Easy to Install
  

Key specifications
Lambda (λ) - 0.021 W/mK
Size(s) - 1190x450 mm
Fire performance - Euroclass F
Edge finishing - Tongue and groove