75mm x 1200mm x 450mm Celotex PIR Cavity Wall Insulation Board CW4000 (Single)

Celotex CW4000 75 mm PIR cavity wall insulation board (75 mm × 1200 mm × 450 mm) is a rigid thermal insulation board designed for partial-fill masonry cavity wall applications. Made with a polyisocyanurate (PIR) foam core and aluminium foil facings, the board offers a low thermal conductivity of 0.022 W/m·K. It is sized to fit standard wall tie spacing, making installation straightforward. The board is lightweight yet dimensionally stable and is suitable for use in new builds or extensions to improve energy efficiency and reduce heat loss.

• Low thermal conductivity of 0.022 W/m·K for high insulation performance
• Low-emissivity foil facings improve U-value in cavity air spaces
• Sized to fit standard wall tie spacing for easy installation
• Lightweight and rigid, facilitating handling and fitting
• Closed-cell PIR structure resists moisture ingress for durability
• Suitable for partial-fill cavity wall use in masonry buildings