Hello, I was at a friend's house who just bought a house where the garage area had water damage. When I looked a bit at the repairs the construction company did, I noticed they hadn't addressed the walls. When I removed the insulation, I saw that on the outside of the stud (the outer wall) there were plywood boards that were slightly black. I told my friend that it wasn't optimal since he planned to build a room in one part of the garage and intended to keep it around 25 degrees in that room. I said that the condensation inside the wall wouldn't be able to escape. My friend said it was a Myresjöhus and they build according to standards so it's built correctly. So my question to those of you who know better than me at a hobby level, is it correct to build like that? I believe there's a high risk that mold will develop inside the wall. I have a cross-section image of the wall. Looking forward to a healthy discussion in this thread.
 
  • Cross-sectional diagram of a garage wall with layers like lock panels, plywood, insulation, wooden studs, vapor barrier, and gypsum board.
Since there is a vapor barrier, no moisture from inside will get out into the wall.
The vapor barrier also prevents any mold from entering the home, even if it is present in the wall.
All this assuming the vapor barrier is well-made and tight everywhere.

The wall will dry out over time if it is not dried out before being put together, which it definitely should be. They might also have applied something like Boracol instead of replacing everything affected by mold.
 
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Jonatan79
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