I'm facing a small dilemma just before purchasing the materials needed to continue with my construction project. I'm building an apartment in an old barn/stable with parts from the mid-1800s in the framework, but we're only talking about logs as the frame, so to speak, with regular planks on the exterior. The new construction is inside this, preserving the old structure, which is partially built inside. The initial plan is to use eco fiber, which can transport some moisture, and a diffusion-open construction with Halotex RS10 as a sub-roof without an air gap (under a metal roof) and Halotex D50 as a vapor barrier inside. The challenging part is sealing where the logs penetrate the internal walls from the exterior wall. They can't be temporarily cut for the vapor barrier...
- Is it sufficient to seal these areas as best as possible and pull it in a bit?
- Should this diffusion-open construction be used in this case or not?
- Is eco fiber the best option with its hygroscopic properties?
- Which vapor retarders are most cost-effective, including all accessories like seam tape, etc.?
- Same question as above, but for the sub-roof?
- Using exterior gypsum as wind protection in the walls. How does this work in combination with a vapor barrier? I want to achieve a resistance difference of about 5-10 times between the vapor barrier and the wind barrier/sub-roof...
