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Polyisocyanurate (PIR) tongue and groove insulation for partial fill cavity walls.

The floor in any building is an area of considerable downward heat loss when not properly insulated. Xtratherm has developed Thin-R Hyfloor XT/HYF (T&G) engineered tongue and grooved floor insulation as the answer to achieve lower U-values in a practical and robust manner.

XT/HYF (T&G) has a superior thickness to performance ratio, allowing the lower targets required under Building Regulations to be achieved with minimum thickness.

General information
Specification data
Product Reference

Thin-R XT/HYF (T&G)


75 mm

100 mm

125 mm

140 mm

150 mm

Standard product features


To BS EN 13165.

Thermal conductivity (lambda value):

0.021 W/m·K.

Board size:

2400 x 1200 mm.


Tongue and groove.

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