Insulating a painted basement wall
I’m going to be moving to a house near Worcester. It has a poured concrete walkout basement. The rim joist has been spray foamed. The walls have been painted. In some spots on the high grade side there’s a bit of mold at the base of the wall.
I would like to insulate the basement with foam board, but I’ve got a few concerns:
1. Is something like PL300 going to be adequate to hold foam board to the painted wall? (Does it need to last longer than the time it takes to frame the wall?)
2. Since I’ve already got a bit of mold, what do I need to do before installing rigid foam to make sure that I don’t get a mold problem. Is the paint going to feed the mold?
3. Should I have a spray foam company spray the top edge to seal it to the rim joist insulation and make sure the wall is fully covered?
4. Should I leave a gap at the floor and fill it with canned foam?
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