Tonight I bought some Perma "R" 1" foil faced insulation at Lowes for my basement walls. I was doing some reading tonight and I read that I don't want the foil faced insulation on the entire wall because it will prevent the concrete walls from letting moisture escape. The basement is 30 years old. Should I return what I bought and instead get the pink XPS or could I just cut some slits in the foil paper to allow moisture to pass thru? Thanks.