XT/CW (T&G)

Thin-R

XT/CW (T&G)

Thin-R Partial Fill Cavity Wall (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.

Cavity Wall (T&G) for use in traditional masonry walls, builds to the highest thermal standards whilst maintaining a residual cavity, offering protection from wind driven rain.

Benefits

Specification Clause

The partial fill cavity wall insulation shall be Thin-R XT/CW (T&G) manufactured to EN 13165 by Unilin Insulation, comprising of a rigid Polyisocyanurate (PIR) core between low emissivity foil facings. The Thin-R XT/CW (T&G) _ _ mm with an Agrément declared Lambda value of 0.022 W/mK to achieve a U-Value of _ _ _W/m2K for the wall element. To be installed in accordance with instructions issued by Unilin Insulation

An Environmental Product Declaration (EPD), certified by IGBC is available for this product. Please contact technical support for further details.

Refer to NBS clause F30 155, F30 12. Uniclass 25 71 63 66.

Resistance ‘R’ Values

The resistance value of any thickness of Unilin insulation can be ascertained by simply dividing the thickness of the material (in metres) by its Agrément declared Lambda value, for example: Lambda 0.022 W/mK and thickness 50mm -> 0.050/ 0.022 -> R-Value = 2.25. In accordance with EN 13165, R-Values should be rounded down to the nearest 0.05 (m2K/W)

1. The Unilin Cavity Wall System includes an optional pre-formed corner panel (XT/CRN) that folds to 90 degrees to effectively insulate a corner junction that is normally vulnerable to Thermal Bridging and cold spots..

2. The Thin-R Cavity Wall (T&G) tongue and groove jointing offers a practical onsite solution that results in a more robust, continuous layer of insulation, minimising the threat of Thermal Bridging and improving the overall U-Value of the wall.

3. The low emissivity foil facing on XT/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 Cavity Wall insulation is placed against the inner leaf of the cavity of a wall. The recommended residual cavity width required is 40mm in accordance with Irish Building Regulations, however, a reduced cavity may be permissible in certain circumstances. A 50mm residual cavity is typically required in Northern Ireland.