Celotex XR4000 insulation board
Celotex XR4000 is a high performance, easy to install polyisocyanurate (PIR) insulation board featuring a low emissivity foil facing. Available in thicknesses from 110mm to 200mm, it can be considered for roof, wall and floor applications.
U-value Calculator
Start your U-value calculation >Suitable Applications
- Concrete Slab Ground Floors
- Suspended Timber Ground Floors
- Beam and Block Ground Floors
- Upgrading existing Concrete Slab Floors
- Timber Frame External Wall Between Studs
- Pitched Roof - Between Rafters
- Pitched Roof - Loft insulation
- Flat Roof - Balconies and Terraces
- Flat Roof - Between and Under Joists
Product Features
- Lightweight 2400 x 1200mm boards
- Low emissivity foil facing
- Achieves a BRE Green Guide A rating
- BBA approved – certificates 16/5352, 17/5405
Product Properties
- Board / Roll size: Width 1200mm, Length 2400mm
- Thickness : 110-200mm
- Material: PIR
Product Performance
- Lambda: 0.022 W/m.K
- Reaction to Fire: Reaction to Fire: Euroclass E Reaction to Fire classification, according to EN 13501-1
Product Benefits
- Excellent thermal conductivity - decreasing the thickness of insulation required to hit the required U-value, optimising space in the construction design and helping to reduce the heating and cooling costs within the building
- Low emissivity foil facing provides improved thermal performance in cavity air spaces, improving the achieved U-value
- Easy to install – lightweight boards are straightforward to handle, fit and transport
- BBA certification - third-party verification that the product has been assessed for its defined applications and is compliant with the relevant Building Regulations.