Originally Posted by Red Squirrel
I want to do this with my basement too, then later on add studs against the foam, and fiberglass insulation. Do you need to put some kind of sealer over the cinder blocks before? Does the foam act as a vapor barrior or would I still add one over the studs before I put the drywall?
My understanding was the foam acts as the vapor barrior. I used blue foam, never can remember the type, then I built a stud wall. My wall doesn't sit right against the foam, just because I had to bring it out a bit to go around things such as sewer line, etc... I then used fiberglass batting and then the drywall. I'm actually using the green board, just as an added layer of protection. Again my understanding is you want the wall in the basement to dry to the inside.
Just adding the foam as well as using can spray foam to insulate the tops of the blocks really made a difference in my basement. The fiberglass batting was just icing on the cake, but I'm not finished yet either!
Hope this helps.