Timber Frame Warm Stud

We developed the "Viking Warm Stud" timber frame system by combining Alaskan and Swedish timber frame construction methods. This construction method eliminates the need for tapes or membranes and simplifies the complete Passive House construction process. The timber frame is constantly warm which keeps the timbers away from the Dew Point so they don't need to be ventilated. The Plywood/OSB outside the Timber frame becomes the air-tightness layer and the wall can breathe in and breathe out from the plywood/OSB layer. Each joint in the plywood/OSB is sealed with a silicone gasket clamped between the stud and the plywood, this forms the airtight layer. The ends of the rafters are cut off where they meet the wall plate so the plywood can continue up and over the roof.

Warm Stud

External Insulation Timber Frame Roof


Warm Stud

External Insulation Timber Frame Foundation


Warm Stud

Flat Warm Roof Block


We can now supply and erect insulated/airtight timber frame houses and Passive Slab foundation systems for as little as €35/ft2, with wall, floor and roof U-values of 0.10W/m.K. The house consists of a 100mm stud and a 150mm roof externally air-tightened with Plywood and externally insulated with 200mm of EPS. The "Warm Stud" method eliminates airtight membranes and tapes and simplifies the air-tightening process. To finish the wall you just plasterboard the inside and plaster the EPS on the outside.