Unilin Cavity Wall Insulation Full Fill PIR 1200 x 450 x 125mm

The Unilin Full Fill PIR Cavity Wall Insulation Board is a high-performance rigid insulation solution designed to deliver outstanding thermal efficiency and moisture protection in cavity wall constructions. Manufactured with a robust PIR (polyisocyanurate) core, these boards offer exceptional U-values and long-term durability while maximizing wall cavity performance.

Perfect for new builds and refurbishments, Unilin’s Full Fill Cavity Wall Insulation ensures a continuous layer of thermal protection without air gaps, helping to maintain a comfortable indoor environment and reduce heating costs.

Features and Specifications

• Brand: Unilin
• Product Type: Full Fill PIR Cavity Wall Insulation
• Dimensions: 1200mm (L) x 450mm (W) x 125mm (T)
• Material: Rigid PIR foam with low emissivity foil facing
• Thermal Conductivity: 0.022 W/mK
• Edge Type: Tongue & Groove for tight joints and reduced thermal bridging
• Water Resistance: High – prevents moisture penetration and maintains insulation performance
• Fire Rating: Euroclass E
• Applications: Full fill masonry cavity wall systems

Benefits

• Exceptional thermal performance – low λ-value reduces U-values and energy consumption.
• Full-fill design – eliminates air gaps and cold bridges for consistent insulation coverage.
• Moisture resistant – foil facings provide an effective barrier against damp and condensation.
• Lightweight and easy to install – rigid board with tongue & groove edges ensures a precise fit.
• Durable and long-lasting – maintains thermal performance over the building’s lifetime.
• Ideal for new build homes – meets modern building regulations for cavity wall insulation.

Ideal Applications

• Full-fill masonry cavity walls in residential and commercial projects
• Suitable for brick and block cavity wall constructions

Can Unilin Full Fill PIR boards be used in partial-fill wall systems?
This product is specifically designed for full-fill applications. For partial-fill insulation, Unilin offers cavity wall boards suitable for that system type.