Cavity Wall Insulation Board – PIR – Full Fill Application

Product Overview

Enhance your building's thermal efficiency with our high-performance rigid polyisocyanurate (PIR) insulation board. Designed for full fill masonry cavity wall applications, this board features a 115mm thickness and dimensions of 1190mm × 450mm. It is engineered with a low emissivity foil facing to deliver exceptional thermal conductivity of 0.021 W/mK, helping achieve low U-values while minimizing overall wall thickness requirements.

The tongue and groove edge profile ensures a tight, secure fit, minimizing air gaps and thermal bridging. This board can be installed as a full fill solution or with a residual cavity of up to 10mm to accommodate mortar squeeze and simplify installation.

Lightweight, rigid, and easy to handle, this insulation board supports fast, efficient on-site fitting, ideal for deeper cavity walls in high-performance housing and commercial developments.

Features & Benefits

• Outstanding thermal performance: Declared thermal conductivity of 0.021 W/mK reduces wall thickness while achieving low U-values.
• High performance facer: Low emissivity foil facing improves performance in cavities with up to 10mm air space.
• Precision fit: Tongue and groove edge detail ensures close jointing and minimal thermal bridging.
• Ease of installation: Sized for standard wall tie spacing; light, rigid boards are simple to transport and fit.
• Certified performance: BBA certified for full fill cavity wall use under Certificate 16/5343.
• Thickness: 115mm board ideal for deeper cavity walls in high-performance housing and commercial developments.

Applications

• Full fill cavity walls: Suitable for use between masonry leaves in domestic and commercial buildings.
• New build housing: Provides excellent U-value compliance in energy-efficient walls.
• Residual cavity installation: Can be fitted with a 10mm residual cavity to accommodate mortar squeeze.
• Thermal upgrade projects: Ideal for meeting advanced energy performance requirements.

Installation Guidance

• Preparation: Ensure cavity surfaces are clean and free from debris before installation.
• Board placement: Install boards with tongue and groove joints interlocked and staggered in brick bond pattern.
• Fixing method: Secure with appropriate retaining clips to wall ties as construction progresses.
• Joint sealing: Ensure tight-fitting joints with no gaps; seal edges as required by specification.
• Residual cavity: Maintain up to 10mm air space where design requires.

FAQ

• What is the thermal conductivity of the board? The board has a thermal conductivity of 0.021 W/mK.
• Can the board be used in commercial buildings? Yes, it is suitable for both domestic and commercial buildings.
• What is the recommended installation method? Install with tongue and groove joints interlocked and staggered in a brick bond pattern.