Description
Product Overview
Celotex CW4100 100 mm Cavity Wall Insulation Board (1200 mm × 450 mm) is a high-performance polyisocyanurate (PIR) insulation board designed specifically for partial-fill masonry cavity wall applications. With a low thermal conductivity of 0.022 W/m·K, CW4100 helps achieve excellent U-values and improved thermal efficiency in new build and refurbishment projects. Each board features low emissivity aluminium foil facings on both sides for enhanced insulation performance and is designed to fit standard wall tie spacing for easy installation.
Key Features & Benefits
- Manufactured from high-performance PIR insulation core
- Low thermal conductivity: 0.022 W/m·K
- Optimised for partial-fill masonry cavity walls
- Foil facings improve thermal efficiency and reduce heat loss
- Lightweight, rigid boards for quick and easy handling on site
- Board size: 1200 mm × 450 mm (6 boards per pack, covering 3.24 m²)
- Thickness: 100 mm
- Provides reliable thermal performance and moisture resistance
- BBA certified and compliant with relevant UK Building Regulations
Applications / Typical Uses
- Designed for partial-fill insulation in new build cavity wall constructions
- Suitable for both residential and commercial buildings
- Ideal for masonry cavity walls where high thermal performance is required
Installation & Handling
- Install between wall ties ensuring boards are tight-fitted with staggered joints
- Maintain a residual cavity as specified by Building Regulations
- Use with appropriate cavity wall insulation retaining clips
- Cut boards cleanly using a fine-toothed saw or insulation knife
- Store flat, off the ground, and protected from moisture prior to installation
Compliance & Certification
- BBA Certified: No. 95/3197 – Celotex CW4000 range
- Thermal conductivity: 0.022 W/m·K
- Manufactured to: BS EN 13165 and BS EN 13950
- Compliant with UK Building Regulations for thermal insulation in cavity walls
- Zero ODP (Ozone Depletion Potential) and low GWP (Global Warming Potential)
