Unilin XT/CW T&G Cavity Wall PIR Insulation – 1200 x 450 x 50mm

The Unilin XT/CW T&G Cavity Wall PIR Insulation Board (1200 x 450 x 50mm) is a high-performance, rigid insulation solution designed for new build cavity walls. Manufactured with a polyisocyanurate (PIR) core and low-emissivity foil facings, it provides reliable thermal resistance in a compact thickness. The tongue & groove (T&G) edges ensure a secure, airtight fit that reduces cold bridging and air leakage, improving overall energy efficiency.

Specifications

• Brand: Unilin
• Product Code: XT/CW T&G
• Product Type: PIR cavity wall insulation board
• Dimensions: 1200mm x 450mm x 50mm
• Material: Rigid PIR (polyisocyanurate) with foil facings
• Application: Full-fill cavity wall insulation (new build)
• Edge Detail: Tongue & groove joints for airtight fit

Features & Benefits

• Excellent thermal performance to improve U-values.
• T&G edges provide secure joints and minimise heat loss.
• Lightweight and easy to cut, handle, and install.
• Foil facings enhance thermal 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 insulation board?
Tongue & groove joints ensure tighter connections between boards, reducing gaps and air leakage, which improves insulation performance compared to square-edge boards.