Celotex XR4000 is a multi-purpose insulation board developed to provide simple solutions for overcoming cold spots in walls, floors, and roofs from a lack of insulation. XR4000 is manufactured from rigid polyisocyanurate (PIR) with low emissivity foil facings.
Celotex XR4000 is an environmentally-friendly polyisocyanurate (PIR) insulation board with excellent thermal performance, featuring a low emissivity foil facing. This board can be used for multiple applications for external walls and timber frames. It is available in thicknesses from 110mm to 200mm and can be considered for the roof, walls, and floor applications.
Lightweight and easy to install, Celotex XR4000 is a durable energy-saving solution which can help you save on heating bills. As well as eliminating cold spots and protecting your thermal environment, Celotex has been awarded an A+ rating in the BRE Green Guide.
The XR4000 insulation board has a thermal conductivity of 0.022W/mK.
Features and benefits of Celotex XR4000:
Excellent thermal performance with a thermal conductivity of 0.022 W/m.K, reducing the thickness of insulation required to hit the target U-value.
Low emissivity foil facing provides improved thermal performance in sealed cavity air spaces, improving the achievable U-value.
Easy to install – Celotex boards are light and rigid assisting with ease of transportation, handling and fitting.
BBA certified – fit for use in defined roof, wall, and floor applications if installed, used and maintained as set out in the certificate.
Celotex XR4000 achieves a BRE Green Guide Rating of A, which can assist in demonstrating environmental performance in your BREEAM assessments.
Lightweight 2400 x 1200mm boards.
Low emissivity foil facing.
Applications for Celotex XR4000 insulation boards:
Ground floor - concrete slab
Ground floor - suspended timber joist
Ground floor - beam and block
Upgrading existing concrete slab floor
External wall - timber frame sheathing
External wall - between timber frame studs
Pitched roof - over timber rafters
Pitched roof - sarking
Pitched roof - between timber rafters
Pitched roof - loft insulation - between and over timber joists
Flat roof - balconies and terraces over timber joists
Flat roof - between timber joists
Discover our Celotex buyer’s guide to find out more information about the brand’s insulation products.
What is the difference between Celotex TB4000, GA4000 and XR4000?
There is no difference, they are the same boards, just different thickness groups.
Can Celotex XR4000 boards be used directly below flooring tiles?
No, PIR insulation boards should not be used directly below flooring tiles. A suitable substrate such as screed should be used above the insulation boards, to distribute the load and prevent movement and cracking of the tiles.
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