The 100mm Unilin XT/CW Partial Fill Cavity Wall (T&G) system features engineered tongue and grooved joints with pre-formed corners. This construction delivers continuous insulation performance and reduces thermal bridging effectively.
Engineered for traditional masonry walls, the 100mm Unilin XT/CW Cavity Wall (T&G) system meets rigorous thermal performance requirements. It delivers outstanding thermal efficiency whilst maintaining a residual cavity, offering superior resistance to wind-driven rain penetration.
Our XT/CW is available in Square Edge and Tongue and Grooved versions. The 100mm Unilin XT/CW was previously known as 100mm Xtratherm XT/CW.
Brand: Unilin / Xtratherm®
Thickness: 100mm
Model: 100mm XT/CW Cavity Wall Insulation Square Edge
Weight: 5.83kg
Dimensions: 1,200mm x 450mm x 100mm
Density: 30Kg/m3
Length: 1200mm
Width: 450mm
Board Coverage: 0.54 m²
Pack Coverage: 2.16 m²
Material: Polyisocyanurate (PIR)
Profile: Square Edge
R-Value: 4.55 m2K/W
Thermal Conductivity: 0.022 W/mk
Vapour Resistivity: 100 MNs/gm
Surface Spread of Flame: Class 1
Compressive Strength: >120kPa
Applications: Cavities ǀ Masonry Walls
Inner facing: Foil facing
Outer facing: Foil facing
BBA Certified: Yes (No. 08/4613)
Features: Lightweight ǀ Easy to handle and install
Browse our comprehensive Unilin range and refine by thickness or coverage using the filters on the left. For product suitability advice or bulk quotations, contact us on +4402038839057, email sales@insulationbee, or use Live Chat for the best UK Insulation prices.










