The wooden skeleton with central support
In the center of the house a 5m high concrete pillar was poured. This pillar has four functions:
1. Support roof beams
3. Ventillation system
4. Thermal mass
All around the concrete pillar the skeleton was assembled. Big roofbeams were supported by pealed logs, gained from Belgian woods.
Window and door boxes were attached to the skeleton. Notice how the whole skeleon is raised on a concrete toe-up, covered with a wooden ring beam.
3. We covered the planks with a double layer of ridgid mineral whool insulation. We had to screw the insulation panels into the wood to prevent them from sliding down.
Unfortunately, as tar paper is the only material that seals off screw holes, we had to use this none eco-friendly material to prevent moisture from seaping into the insulation material from underneath.
The skeleton was filled in with straw bales.
Mind how the strawbales are placed vertically. This is more logic as the thickness and width of a bale is always the same, but the length differs for each bale. Placing bales vertically allowed us to keep a constant heart to heart distance between every vertical pole.
Also mind how we cut out the corner edge of each bale to fit snuggly around each pole. This way we were able to get a full layer of straw going all around the house, without any wood sticking through ('cold bridge') and still have the skeleton supporting the strawbales.
Every gap was carefully filled with straw to prevent cold leaks.
The outside was covered with lime by Mathias Lootvoet of Leemniscaat. We decided to finish the outside render with loam because our roof overhang is so big that the walls are dry during the whole year and Lime was not necessary.
On top of the beams, we placed eco-osb boards as a sub-flooring. We are still deciding whether to use planks as a finished floor layer or loam. Because we only have 5cm of floor height left and because it is unusual to put a loam floor on top of a wooden sub-floor , we decided it would be best to make a little try-out first ...
Also all furniture was built (and still is being built) single handed. We always start from rough log planks.