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Brick Superstore£21.00Visit shop Celotex Light/Green 30Mm Tb4030 Insulation Board - 2.4M X 1.2M Pir
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The Celotex TB4000 is a high-performance polyisocyanurate (PIR) insulation board designed for professional builders and contractors seeking superior thermal efficiency in floors, walls, and roof applications. Its primary benefit is a low thermal conductivity of 0.022W/mK, which allows for thinner insulation profiles without compromising performance. However, users should note that as a rigid PIR board, it requires precise measuring and cutting to ensure an airtight fit in irregular spaces.
| Model Part Number | TB4000 |
|---|---|
| Brand | Celotex |
A fine-toothed hand saw or a dedicated sharp insulation knife provides the cleanest cuts.
TB4000 is primarily designed for internal applications; please check specific manufacturer documentation for external use compliance.
The PIR core is moisture-resistant, but the joints and board edges should be sealed properly to prevent moisture ingress in high-humidity areas.
Consult with a building control officer or use the Celotex U-value calculator tool to determine the correct thickness required for your specific build-up.
The foil facing acts as an effective vapor barrier, but ensure all joints are taped to maintain the integrity of the vapor control layer.
Measure twice and cut slightly oversized (1-2mm) to ensure a compression fit against the structural members.
Use metallic insulation tape to patch any small tears or punctures in the foil surface to maintain vapor control integrity.
For optimal results, ensure the surface area is clean, dry, and flat before installation. Use a fine-toothed saw or a sharp insulation knife to cut the boards to size, ensuring they fit tightly against joists or wall studs to prevent thermal bridging.
