Fixing and buying guide

What this product is and who it is for

This is a rigid polyisocyanurate (PIR) foam insulation board. It is designed for builders, contractors and experienced DIY customers undertaking thermal insulation work in new build properties, refurbishment projects and retrofit upgrades. The lightweight rigid board format makes it suitable for both horizontal and vertical applications, including floors, walls and roofs where structural stability and consistent thermal performance are required.

Sizing, pack contents and coverage

Each board measures 1200 x 2400 x 120mm. The 120mm thickness is suited to mid-range thermal requirements in building fabric upgrades. You will receive one board per pack. Plan your layout to minimise waste: the 1200mm width and 2400mm length allow flexible positioning across typical joist and stud spacings. Measure your installation area carefully and account for cutting and edge detailing before ordering.

• Board dimensions: 1200 x 2400 x 120mm
• Thickness: 120mm for mid-range thermal performance
• One board per pack
• Suitable for floor, wall and roof applications

Thermal and structural performance

Thermal conductivity of 0.022 W/mK ensures consistent heat retention performance across your installation. Compressive strength of 175 kPa provides structural stability under typical loading conditions, making this board suitable for applications where the insulation must support its own weight and minor loads. BBA product assurance confirms that thermal and structural properties meet specification.

• Thermal conductivity: 0.022 W/mK
• Compressive strength: 175 kPa
• BBA-backed performance assurance
• Lightweight rigid foam for easier handling

Pre-installation checks and preparation

Before fixing, inspect the board for damage and ensure the installation surface is clean, dry, level and structurally sound. Check that the substrate can support the board weight and any additional loads. Confirm that the 120mm thickness is compatible with your building detail, cavity width or joist depth. Plan your cutting and edge detailing in advance, particularly around openings and service penetrations. Ensure adequate ventilation and moisture management in your installation design, especially in retrofit and refurbishment work where existing building fabric conditions may vary.