Unilin XT CW Cavity Wall PIR Insulation 1200 x 450 x 75mm

The Unilin XT CW PIR Cavity Wall Insulation Board is a high-performance insulation solution designed to deliver exceptional thermal efficiency in partial-fill masonry cavity wall constructions. Manufactured from a rigid PIR (polyisocyanurate) core with low emissivity foil facings, this board provides superior insulation while keeping walls slim and efficient.

With its lightweight design and tongue & groove edge detail, installation is quick, secure, and seamless — ensuring reliable energy performance for years to come.

Features and Specifications

• Brand: Unilin
• Product Type: PIR Cavity Wall Insulation Board
• Dimensions: 1200mm (L) x 450mm (W) x 75mm (T)
• Material: High-quality PIR (polyisocyanurate) core
• Thermal Conductivity: 0.022 W/mK
• Facing: Low emissivity foil on both sides
• Edge Detail: Tongue & Groove for reduced thermal bridging
• Fire Rating: Euroclass E
• Application: Partial-fill cavity wall insulation

Benefits

• Excellent thermal performance – reduces heat loss and improves energy efficiency.
• Lightweight and easy to install – perfect for quick on-site fitting.
• Durable and moisture-resistant – retains insulation value over time.
• Tongue & groove edges – provide secure joints and minimize air leakage.
• Slim design, high insulation value – achieves low U-values in limited space.
• Complies with building regulations – meets modern standards for cavity wall construction.

Ideal Applications

• Suitable for partial-fill cavity wall insulation in residential and commercial masonry buildings.
• Ideal for new builds, extensions, and refurbishments requiring efficient wall insulation.

Can the Unilin XT CW 75mm board be used in full-fill cavity wall applications?
No, this board is designed specifically for partial-fill cavity walls, maintaining a residual air gap to prevent moisture penetration and ensure long-term performance.