How to insulate this stairwell
the74impala
| Posted in Building Code Questions on
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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Replies
Provided the cells are clear, there are pour in insulation products for CMU. You can search for perlite, vermiculite or Zonolite.
If you want to add more, when tight on space, you can also glue polyiso the CMU and glue drywall directly to that.
I guess filling it with the shredded polystyrene and then do the gluing will be an improvement over what it was before. Thanks for the ideas.