U-Values provide a measure of the heat transfer through different materials. To allow you to compare options we quote the U-values of the walls below. If you intend to use your cabin all-year-round - rather than seasonally - you should choose as thick a wall as possible, to maximise the insulation.

We use interlocking tongue & groove timber in our walls to provide strength and stability, it also allows timber to naturally expand and contract.

Our 130mm uninsulated walls are a cabin-within-a-cabin. We recommend these for home offices and cabins being used all-year-round. (U-Value 1.28 w/m2 k without insulation) (U-Value 0.29 w/m2k with insulation)



The 130mm insulated walls consist of one 28mm external wall, 70mm air gap (which can be filled with Polyisocyanurate insulation. See step 3 'Insulation Options') and a 28mm inner wall. The two walls are not connected to each other - unlike competitors systems - to ensure that; as the outer wall expands and contracts with changing weather, and the inner wall dries out in a warmer environment or soaks up moisture from excess trapped humidity, that the two walls don't pull each other in separate directions or create gaps since they are not connected together unlike the competitors alternative.