XT/TF

Thin-R

XT/TF

Timber Frame construction is a fast, systematic method that results in high performing buildings with regard to energy efficiency in environmental terms.

Unilin’s Timber Frame Systems bring timber framed wall insulation performance to new levels, surpassing the default values asked for in current building regulations. Using XT/TF in timber framed walls helps achieve NZEB fabric standards and Passive House Standards.

Benefits

Specification Clause

The wall insulation shall be Thin-R XT/TF manufactured to EN 13165 by Unilin Insulation, comprising of a rigid Polyisocyanurate (PIR) core between low emissivity foil facings. The Thin-R XT/TF_ _ mm with a Agrément declared Lambda value of 0.022 W/mK to achieve a U-Value of _ _ _W/m2K for the timber frame 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, K10 15, K10 205, F30 12, P10 40, B15 110, B15 120, P10 190. 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).

Fabric First Approach

Building Regulations now concentrate on ‘Whole House Performance’. Using Timber Frame will improve the efficiency of the building fabric, delivering excellent U-Values. Good detailing and attention to air tightness will also contribute to highly efficient constructions.

Timber Framing & Lower U-Values

Due to the restriction that the stud depth presents, the only pragmatic solution to pushing timber frame wall performance towards NZEB fabric standards and Passive House Levels is to insulate the thermal bridge created by the timber studs. This can be achieved by either insulating internally or externally with XT/TF in a traditional cavity.

Low Emissivity Foil Facings

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

White Paper

The BRE, with the support of Unilin, have published “SD 7 Insulation of timber-frame construction”. Based on the constructions outlined in this publication, XT/TF can help you achieve U-Values as low as 0.14 W/m2 K within a traditional timber frame construction.

U-Values

The calculation of U-Values have been done in accordance with BR443 “Conventions for U-Value calculation”

Due to large variations of construction methods in timber frame wall systems, please contact our Unilin Technical Team for U-Value calculations.