Felt paper on subfloor before installing hardwood floor?
I’m getting ready to install a solid 3/4″ t&g red oak floor on a raised house on the gulf coast.
It is not insulated underneath, although the owner would like to get spray foam under there sometime down the road.
I was wondering if 15 lb.or 30 lb. felt paper, or underlayment available at a place like Lumber Liquidators would have any effect on moisture being trapped in the 3/4″plywood sub floor?
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