70mm Unilin XT/CW Partial Fill Cavity Insulation

The 70mm Unilin XT/CW Partial Fill Cavity Wall (T&G) system incorporates engineered tongue and grooved joints with pre-formed corners for seamless insulation integration and reduced thermal bridging.

Engineered specifically for traditional masonry walls, this 70mm cavity wall solution meets rigorous thermal performance standards. The system delivers superior thermal efficiency whilst preserving a residual cavity space, offering robust defence against wind-driven rain penetration.

Our XT/CW is available in Square Edge and Tongue and Grooved versions. The 70mm Unilin XT/CW was previously known as 70mm Xtratherm XT/CW.

Product Specification

Brand: Unilin / Xtratherm®

Thickness: 70mm

Model: 70mm XT/CW Cavity Wall Insulation Square Edge

Weight: 6.80kg

Dimensions: 1,200mm x 450mm x 70mm

Density: 30Kg/m3

Length: 1200mm

Width: 450mm

Board Coverage: 0.54 m²

Pack Coverage: 3.24 m²

Material: Polyisocyanurate (PIR)

Profile: Square Edge

R-Value: 3.18 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

Important Features From Our 70mm XT/CW Partial Fill:

1. Robust tongue and groove jointing system.
2. Corner panels and cavity closers reduce thermal bridging.
3. Preserves clear cavity for optimal thermal performance.
4. Unrestricted exposure capability.
5. Low emissivity foil facings enhance Cavity insulation performance.

Info

Browse our Unilin range and filter by thickness or coverage using the left-hand navigation. For project-specific advice or bulk quotations, contact us on +4402038839057, email sales@insulationbee, or use Live Chat for competitive UK Insulation pricing.