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Brick Superstore£55.80Visit shop Celotex Pl4025 Insulated Plasterboard 2400 X 1200 X 37.5Mm Pir Polyiso
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Travis Perkins£148.79Visit shop Celotex PIR Thermal Laminated Insulation Board 2400mm x 1200mm x 25mm (37.5mm Overall)
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The Celotex PL4025 Insulated Plasterboard is a high-performance, two-in-one thermal solution designed for builders, contractors, and DIY enthusiasts looking to improve energy efficiency in both new builds and renovation projects. By combining a 12.5mm plasterboard with high-performance PIR insulation, it significantly reduces installation time by performing the work of two separate components in a single application. While it offers excellent thermal conductivity of 0.022 W/mK, users should note that its total thickness of 37.5mm requires careful planning when working in tight spaces where every millimeter of floor or wall depth matters.
| Model Part Number | PL4025 |
|---|---|
| Brand | Celotex |
This specific product is primarily designed for walls and roofs. For flooring applications, it is generally recommended to use boards specifically rated for compressive strength.
The total thickness is 37.5mm, which includes the 12.5mm plasterboard layer.
PIR insulation provides significant resistance to water vapor, but you should verify with local building regulations if a separate vapor control layer is required for your specific climate or room usage.
Yes, once the joints have been taped and filled and the surface is prepared, you can apply primer and paint as you would with standard plasterboard.
A fine-toothed hand saw or a circular saw with a dust extraction attachment is recommended to achieve a clean cut.
Handle boards on their side rather than flat to reduce stress, and ensure they are protected from impact during transit.
Check that the substrate is not overly porous or dusty; prime the surface if necessary and ensure adhesive dabs are spaced correctly per manufacturer guidelines.
Ensure that the tapered edges are properly filled with high-quality jointing compound and that joint tape is embedded correctly.
For best results, store boards in a dry, flat environment off the ground to prevent moisture absorption. When installing via the 'dot and dab' method, ensure the background is clean, stable, and free from loose debris to ensure the adhesive bond holds effectively. If using mechanical fixings, ensure the fixings are of sufficient length to penetrate through the insulation and secure firmly into the structural substrate without crushing the foam. Use a fine-toothed saw or a power tool with a dust extraction system to cut the boards. Always wear appropriate personal protective equipment (PPE), including a dust mask and safety glasses, when cutting to minimize irritation from insulation dust.
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