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Thin-R XT/TF

Polyisocyanurate (PIR) insulation for timber framed walls.

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

Xtratherm’s timber frame systems surpas the default values asked for in current building regulations for timber framed wall insulation. Using Thin-R Timber Frame XT/TF in timber framed walls helps achieve Zero Carbon Fabric and Passive House Standards.

General information

Uniclass 2015

Pr_25_71_63_66 Polyisocyanurate (PIR) foam boardsPrimary


F30/12 Partial fill cavity insulation

F30/155 Partial fill cavity insulation

K10/15 Lining on timber

K10/205 Lining on timber

K10/245 Ceiling lining on timber

K10/25 Lining on timber framed ceilings

P10/180 Insulation to water cisterns

P10/40 Insulation fitted between studs

Specification data - Polyisocyanurate (PIR) foam boards

Product Reference

Thin-R XT/TF


25 mm

40 mm

50 mm

60 mm

80 mm

100 mm

120 mm

Standard product features


To BS EN 13165.

Board size:

2400 x 1200 mm.

Thermal performance (lambda value):

0.022 W/m·K.

Product Options


Other sizes available dependent on quantity and lead time.

Third party certifications
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