Hello, I’m not sure what to do next. I have read many pages about whether or not to use a vapor barrier. We were advised to lay polystyrene boards on the existing wooden plank floor and then put OSB panels on top. The floor should remain walkable. I am attaching several pictures for better explanation. We have a wooden beam ceiling with “sauerkraut boards” (wood wool boards) in between, and some rubble on top. Now the questions: Should we remove all the wooden planks and install insulation between the beams? Or just lay polystyrene boards on top of the planks and then OSB panels? Do we need a vapor barrier here? If yes, should it be placed on top of the “sauerkraut boards” and then insulation on top? I have no idea what the best solution is, please help!
Joedreck schrieb:
So the upper floor will be fully heated and fully used?Exactly, that’s how it is.
G
garfunkel5 Nov 2017 19:57Why is the focus more on soundproofing then? He wants to insulate the upper floor from the attic after all.
I definitely wouldn’t use OSB boards as the top layer because they also act as a vapor barrier. This means it would be sealed on the upper side, where it actually needs to be more vapor-permeable. Not ideal, so it’s better to use tongue-and-groove boards with a little gap between the individual planks.
Honestly, I don’t see why it should work without a vapor retarder.
But I’m not an expert.
I definitely wouldn’t use OSB boards as the top layer because they also act as a vapor barrier. This means it would be sealed on the upper side, where it actually needs to be more vapor-permeable. Not ideal, so it’s better to use tongue-and-groove boards with a little gap between the individual planks.
Honestly, I don’t see why it should work without a vapor retarder.
But I’m not an expert.
G
garfunkel5 Nov 2017 21:50Okay, now I'm not so sure either. Of course, I am referring to the top floor ceiling.
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