The below U-Value table shows the required thickness of Quinn Therm QR insulation boards required to achieve the desired U-Value in a typical pitched roof construction. Our free, online U-Value calculator can be used to calculate the required thickness of insulation for other pitched roof constructions.
|Quinn Therm QR above joists||U-value (W / m2K)|
U-value results above based upon pitched roof construction shown:
12.5mm plasterboard; 150mm mineral wool insulation between joists; 150mm deep joists @400mm centres; Quinn Therm QR; timber flooring. Calculations performed to BS EN ISO 6946, taking account of repeating thermal bridges.
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