Hello,
I have a newly built townhouse with an unfinished basement. The slab rests on a vapor barrier, 3 layers of foam insulation, and gravel. The basement walls are Thermowalls made of styrofoam with a concrete core.
Now to the question, I am going to put up an interior wall in the basement and wonder if I really need to use base paper or similar since there is already a vapor/moisture barrier on the outside?
