U-VALUE CALCULATOR

VERSION 1.5.4

Step 3. Construction build-up for calculations

Over Rafter (Sarking) - Two layer insulation

Tiling including batten space
Breather membrane
Timber counter batten 47 x 47
25mm Insulation between counter battens
OR
Unventilated cavity, low emissivity rafter space
12.5mm Gyproc Wallboard

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