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Brick Superstore£36.00Visit shop Celotex Green 75Mm Ga4075 Insulation Board - 2.4M X 1.2M Pir
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The Celotex GA4075 is an ideal solution for builders, contractors, and DIY enthusiasts looking to improve the thermal efficiency of floors, roofs, and walls without sacrificing significant interior space. By leveraging high-performance rigid polyisocyanurate (PIR) technology, it provides superior thermal conductivity, though users should ensure they are comfortable working with standard insulation cutting tools and handling foil-faced materials during installation.
| Model Part Number | GA4075 |
|---|---|
| Brand | Celotex |
Yes, its high compressive strength makes it suitable for use beneath screeded underfloor heating systems.
No, GA4075 is specifically designed for internal applications and should not be used as external cladding insulation.
The Celotex GA4075 75mm board provides an R-value of 3.40m2K/W.
While the foil facing acts as a vapor check, local building regulations may require an additional vapor control layer depending on the humidity of the space.
Use a straight edge as a guide and a fine-tooth saw for the cleanest finish, minimizing dust production.
Trim the board by an additional 2mm on each side and ensure the frame is plumb before forcing the board into place.
Fill any gaps exceeding 5mm with expanding polyurethane foam to maintain the integrity of the thermal envelope.
Installation of the GA4075 requires standard woodworking tools, such as a fine-tooth saw or a sharp insulation knife. When fitting into timber or steel-framed systems, ensure a tight friction fit; boards should be cut approximately 5-10mm wider than the gap to ensure they stay in place.
For storage, keep boards indoors or under cover on a flat, dry surface. Protect edges from impact to prevent crumbling of the PIR core. If installing in damp environments, ensure an appropriate vapor control layer is applied to the warm side of the insulation to prevent interstitial condensation. Always wear appropriate personal protective equipment (PPE), including gloves and a dust mask, when cutting the boards.
