Xtratherm PIR+PB is a high-performance rigid polyisocyanurate insulation board with an integrated polyester-backed vapour control layer. Delivering a thermal conductivity of 0.022 W/mK, this 72mm composite board (60mm PIR + 12.5mm PB) is engineered for superior energy performance in timber frame construction. The factory-bonded backing eliminates additional vapour barrier installation, streamlining on-site application.
Key Features
- Lambda value: 0.022 W/mK for excellent thermal resistance
- Integrated polyester-backed vapour control layer
- Composite 72mm thickness (60mm PIR + 12.5mm PB)
- Standard board size: 2438 x 1200mm
- Suitable for timber frame walls and cavity applications