How to insulate this stairwell
The stairwell is already only 34″ wide. It previously (this morning) had a 2×3 down at the turning landing and a spf 2×6 nailed to the top of the cinder blocks. Drywall covered them all around. Any suggestions on how to give this assembly some increased r-value without narrowing any more than necessary. I am pretty sure I can air seal it, but I don’t think 2 inches of polyiso is going to cut it here. Have any of you used those bean bag chair eps filler beads? All of the cmu is exterior and covered with 30 year old 2″ xps foam. Zone 7, Northern Wisconsin.
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