75mm Unilin XO/CW is used as partial fill cavity insulation to reduce the thermal transmittance of cavity walls in new buildings of a domestic or nondomestic nature.

Xtroliner XO/CW improves U-Values and meets Future Homes standards, providing an excellent choice for passive and low energy builds.

Unilin Partial Fill Cavity Board XO/CW (T&G) can achieve a passive U-Value of 0.15 W/m2K in a traditional cavity wall.

When building with XO/CW (T&G), a residual cavity is maintained, offering excellent protection against wind driven rain.

The XO/CW (T&G) tongue and groove board minimise the threat of thermal bridging and improve the overall U-value of the wall.

The low emissivity foil facing on XO/CW (T&G) improves the thermal performance of the wall.

The residual cavity is the most effective method of preventing wind-driven rain penetrating a wall from the outside.

A residual cavity is the air space that remains when XO/CW (T&G) is placed against the inner leaf of the cavity of a wall.

The recommended residual cavity width required is 50mm in accordance with BBA agrément certification.

Specification:

Thickness: 75mm

Width: 450mm

Length: 1200mm

Size: 75mm x 450mm x 1200mm

Pack Quantity: 6 sheets

Pack Coverage: 3.24m2

Board Coverage: 0.54m2

Profile: Tongue and Grooved

R-Value: 3.55 m2K/W

Density (Foam Core): 32kg/m3 

Thermal Conductivity: 0.021 W/mK

Compressive Strength: >120 (kPa)

Reaction to Fire: Euroclass C, s2-d0

Unilin Xtroliner XO/CW Cavity Features:

 · Improves U-Values.

 · Reduced thermal bridging.

 · Clear cavity maintained.

 · Robust textured foil facings.

 · Meets Future Homes standards.

 · Lightweight and easy to install.

 · Euroclass C s2 d0 fire classification.

 · Achieve a passive U-Value of 0.15 W/m2K.

 · Engineered tongue and grooved jointing.

 · Lower Lambda value for improved U-Values.

 · Excellent choice for passive and low energy builds.

 · Declared lambda (thermal conductivity) of 0.021 W/mK.

Unilin Xtroliner XO/CW (T&G) Partial Fill Cavity Installation Guidelines:

 · Under PD 6697:2019 to BS EN 1996-1-1 and BS EN 1996-2, it is recommended that no more than four courses of block are laid on the preceding skin before installation of the insulation.

 · This allows for wall ties to be inserted accurately and without bending and thus distorting the physical characteristics of the wall ties.

 · Ensure the wall is level and free of any protrusions before installing the insulation with all edges tightly interlocked.

 · Mortar should be struck from the inner cavity face of the block to ensure mortar squeeze is minimised on the cavity side.

 · The inner and outer courses can then be built.

 · Insert wall ties maximum 600mm centres one block course below DPC.

 · Wall ties should incorporate retaining clips and be agrément approved.

 · Secure cavity boards tight against inner leaf with retaining clip on wall ties.

 · Boards should be installed with the tongue uppermost and joints should be tightly butted.

 · Ensure a minimum 150mm overlap with the floor insulation.

 · The receiving block should be plumb to provide a flat surface to accept the insulation.

 · Alternate corner boards will achieve the offset break bonded pattern for the insulation.

 · Maintain a 50mm residual cavity to suit all exposure zones.

 · In isolated circumstances where the cavity is obstructed, a minimum 25mm residual cavity should always be maintained and extra consideration should be given to fixings and weatherproofing.

 · Any reduction in cavity width should be agreed with Building Control.

 · Place wall ties at maximum 900mm x 450mm centres, securing with a minimum of 3 wall ties per board.

 · Ensure block joints are fully bonded with unbroken mortar.

 · Fix wall ties 225mm vertically and 150mm horizontally from the face of unbonded jambs.

 · Ensure wall ties and cavities are kept clean of mortar.

 · Wall ties should be sloped downwards towards the outer leaf.

 · A cavity board should be used to keep the cavity clean.

 · Newly erected masonry should be covered to protect the insulation and to prevent the mortar being washed out of the joints by rain.

 · Walls should be prevented from becoming saturated by covering the top of the wall with waterproof sheets; this is particularly important to minimise the incidence of efflorescence and lime bloom.

 · When any working platform is not in use, the inner board should be turned away from the wall to prevent the splashing of the wall face.

*Further information may be found in our Downloads section.

Fairly easy access to all PDF files.

Datasheet ǀ Declaration of Performance - DoP ǀ BBA Certificate ǀ Installation Guide ǀ Certificates ǀ Brochure ǀ SPEC Sheet 

*Special Product - Non returnable cancelable.