Celotex TB4000
Celotex TB4000 is a high performance, easy to install polyisocyanurate (PIR) insulation board featuring a low emissivity foil facing. Available in thicknesses from 20mm to 40mm, it is suitable for floor, wall and roof applications
U-value Calculator
Start your U-value calculation >Suitable Applications
- Ground floors – perimeter upstand
- External walls – internal lining
- Pitched roofs – underneath the rafters
- 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 : 20-40mm
- Material: PIR
Product Performance
- Lambda: 0.022 W/m.K
- 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, reducing 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.