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Brick Superstore£102.00Visit shop Celotex Green High Performance Insulation Board Xr4165 - 2.4M X 1.2M X 165Mm Pir
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The Celotex XR4165 is a high-performance PIR insulation board designed for builders, contractors, and DIY enthusiasts looking to improve thermal efficiency in roofs, floors, and walls. Its primary benefit is providing superior thermal conductivity of 0.022 W/mK, allowing for thinner board installations to meet strict U-values, though it requires careful handling to ensure the foil facing remains intact for optimal thermal reflection.
| Model Part Number | XR4165 |
|---|---|
| Brand | Celotex |
The Celotex XR4165 has a thermal conductivity of 0.022 W/mK.
Yes, the XR4165 is suitable for solid floor applications where it provides excellent thermal resistance.
The board is designed to meet building regulations for fire safety, but it is not classified as non-combustible; consult your local building inspector for specific project requirements.
You can cut the boards using a standard fine-toothed saw or a dedicated insulation knife.
BBA certification indicates that the product has been assessed and verified by the British Board of Agrément to be fit for purpose when used as intended.
While PIR boards are primarily for thermal insulation, the density provides some minor sound dampening, though it is not a dedicated acoustic product.
Use an insulation knife to shave off thin layers to ensure a snug, friction-fit without leaving gaps.
Use high-quality aluminum foil tape to patch the tear, ensuring the reflective barrier is fully restored.
Ensure the substrate is level; if bowing persists, check that boards are not being forced into spaces smaller than their actual dimensions.
To install, measure the area accurately and use a fine-toothed saw or a sharp insulation knife to cut the board to the required dimensions. When fitting, ensure boards are tightly butted together to prevent thermal bridging. Compatibility is broad, as the XR4165 works well with standard masonry, timber frames, and steel structures. Care should be taken to store the boards in a dry, covered area off the ground to prevent moisture ingress. While the boards are durable, avoid puncturing the foil facing during installation, as damage to this layer can slightly reduce the overall thermal performance.
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