Basement wall insulation below grade
We have a split level house with the basement 3.5 below grade, so have a stud wall 3.5 tall, a ledge, then the above grade wall in the basement. We had to remove all sheetrock and insulation due to some mold which is now remediated. The insulation that was in there was the fiberglass batt. I am wondeing how to best insulate the 3.5 ft below grade wall now. The studs are right up against the block wall.
Can we put foam board XPS in between each stud? Would we fill the full 3.5in with foam board or would just 2 in be ok? Would we want to seal around the edge of the foam/stud? thanks for any suggestions.
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