BrackensBuild

142mm SIPs + 100mm EWI = better u-value for the same wall depth versus just a 250mm SIP. In addition, we can reduce cold bridging where we have timber posts within the SIPs instead of the splines (where structurally required).

We’re building with SIPs and will have 100mm EWI on the walls and 80mm insulation on the inside of the roof. For the walls, we will use Glidevale Thermo Extreme breather membrane outside, then Glidevale Protect BarrAir membrane on the inside. Currently trying to work out if we use the same membranes for the pitched roof and would welcome any thoughts or suggestions.