U-VALUE CALCULATOR

VERSION 1.5.4

Step 3. Construction build-up for calculations

Un-Ventilated (Breather Membrane) - Insulation Between & Over Rafters

Tiling including batten space

Counter batten

Breather membrane

OR

Cavity (low emissivity) rafter space

VCL & Air leakage barrier

12.5mm Gyproc Wallboard