Unilin XT/CW T&G Cavity Wall PIR Insulation – 1200 x 450 x 60mm

The Unilin XT/CW T&G Cavity Wall PIR Insulation Board (1200 x 450 x 60mm) is a rigid, high-performance board designed for new build cavity wall applications. Made with a polyisocyanurate (PIR) core and low-emissivity foil facings, this insulation board provides excellent thermal efficiency and helps achieve compliance with Part L Building Regulations. Its tongue & groove (T&G) edges ensure tight-fitting joints, reducing air leakage and minimising thermal bridging.

Specifications

• Brand: Unilin
• Product Code: XT/CW T&G
• Product Type: PIR cavity wall insulation board
• Dimensions: 1200mm x 450mm x 60mm
• Material: Rigid PIR (polyisocyanurate) with foil facings
• Edge Detail: Tongue & groove (T&G) joints for airtight fit
• Application: Full-fill cavity wall insulation (new build)

Features & Benefits

• Excellent thermal resistance for improved U-values.
• T&G joints minimise cold bridging and improve airtightness.
• Lightweight and easy to cut, handle, and install.
• Foil facings reduce heat loss and boost insulation efficiency.
• Moisture-resistant PIR core ensures long-term durability.

Applications

• Full-fill cavity wall insulation in new builds
• Residential housing projects
• Commercial and energy-efficient developments

Why choose a T&G cavity wall board instead of square edge?
Tongue & groove boards provide tighter joints, which help reduce air leakage and cold bridging, delivering better overall thermal performance.