Should I use Closed Cell foam on the underside of my hardwood floor?
Renovating an old house.
I am going with closed cell on the attic roof (rafters are only 2×4 so open cell not an option).
The same guy thinks I should use closed cell (just 1″) under the floor of my house. Of course others say I should use open cell.
My hardwood floor is White Oak from the 20’s….
I live in Austin, TX, so some humidity.
There is nothing under it except the crawl space (about 2.5 feet).
So the 1″ of closed cell would spray right up onto the hardwood directly from the underside…..
I like the idea of 1″ of this because I get a good deal from him doing it all at once (40% discount on the floor after the attic).
And I like the idea of it “solidifying” my floor.
I like how closed would not allow moisture up, but don’t like how it would not allow leaks down.
I also like how it is just 1″ vs 3″ of open cell (allows for more clearance and more joists to run wires along).
Is it bad for the floor?
Is it better to open cell?
Thanks! I think I’m ready to go with this, figured I might as well double check though.
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