ThermaQuilt - Pitched Roof

Installation of ThermaQuilt for under rafter applications and additional insulation products should be in accordance with the manufacturers certificate, fixing instructions and current good building practice.

ThermaQuilt is applied directly from the roll either vertically or horizontally depending on the rafter height, pulled tight and stapled onto the rafters at minimum 300mm centres.

ThermaQuilt should be overlapped at each joint by approx. 50mm and stapled onto the rafters, the joints should be sealed using YBS Foil Tape. Additionally, at the eaves ThermaQuilt is cut around the rafters and sealed to the Cavity wall insulation or wall plate.

Fix 25mm by 38mm battens at right angel to rafters. Battens must always be fixed around the perimeter of windows.

The plasterboard is fixed over the ThermaQuilt and onto the battens in the usual manner.

Under Rafter Details


U-value Table

Description (rafters at 400 centres)U-Value
ThermaQuilt and 100mm PIR (0.022 W/mk)0.18 W/m²K
ThermaQuilt and 140mm PIR (0.022 W/mk)0.15 W/m²K
ThermaQuilt and 170mm PIR (0.022 W/mk)0.13 W/m²K
Description (rafters at 600 centres)U-Value
ThermaQuilt and 90mm PIR (0.022 W/mk)0.18 W/m²K
ThermaQuilt and 120mm PIR (0.022 W/mk)0.15 W/m²K
ThermaQuilt and 150mm PIR (0.022 W/mk)0.13 W/m²K