60mm Unilin XT/CWP (T&G) Partial Fill Cavity Walls is an engineered tongue and grooved joint partial fill cavity system used to ensure insulation continuity and minimisation of thermal bridging.

The lower lambda (thermal conductivity) of 0.021 W/mK improves U-Values of the cavity and meets Future Homes standards, proving an excellent choice for passive and low energy builds.

The Cavity Wall Thin-R Plus XT/CWP tongue and groove jointing offers a practical on-site solution that results in a more robust continuous layer of cavity wall insulation.

Partial Fill Cavity Wall Plus T&G builds to a system thanks to its engineered tongue and grooved joints and pre-formed corners, ensuring insulation continuity and minimisation of thermal bridging.

XT/CWP (T&G) is the best solution when building traditional masonry walls to the highest thermal standards whilst maintaining a residual cavity, offering excellent protection from wind driven rain.

The low emissivity foil facing on the boards improves the thermal performance of the wall.

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

A residual cavity is the air space that remains when Cavity Wall Plus is placed against the inner leaf of the cavity of a wall.

The recommended residual cavity width allowed is 50mm in accordance with BBA Agrément certification.

Specification:

Thickness: 60mm

Length: 1200mm

Width: 450mm

Size: 60mm x 450mm x 1200mm

Board coverage: 0.54m2

Pack coverage: 3.78m2

Pack quantity: 7 sheets

Density (Foam Core): 30Kg/m3

Thermal Conductivity: 0.021 W/mk

R-Value: 2.85 m2K/W

Commpressive Strength: >120 (kPa)

Water Vapour Resistivity: >100 MNs/gm

Reaction to fire: NPD

Unilin XT/CWP Thin-R Plus Cavity Features:

 · Improved lambda value of 0.021 W/mK.

 · Robust tongue & groove jointing.

 · Reduced thermal bridging.

 · Clear cavity maintained.

 · No exposure restrictions.

 · Suitable for passive and low energy builds.

 · Partial fill cavity wall systems.

 · Rigid enhanced premium polyisocyanurate core.

 · Low emissivity aluminium foil facings.

 · BBA Agrément certification.

Unilin XT/CWP Thin-R Plus Cavity Insulation Installation Guidelines:

 · Under Eurocode 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 two courses of blockwork can then be built, ensuring the mortar is struck back from the cavity face to prevent mortar squeeze.

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

 · Wall ties should incorporate retaining clips, be Agrément approved and conform to BS EN 845-1: 2013 + A1: 2016.

 · 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.

 · As with setting out, installation should commence from adjacent corners using the Cavity Wall Plus pre-formed corner boards.

 · 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.

 · Cavity Wall Plus corner boards and cavity closers may be fitted to provide robust detailing.

 · Newly erected masonry should be protected 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.