Should I spray foam this rim joist/sill plate area for air sealing in our conditioned crawl?
3,500 square foot crawlspace with height ranging from 4ft tall to 6ft tall.
It is a conditioned crawl. Zone 5B. We have the vapor barrier down and now time for insulation. I am not ready to pay for the whole thing to be spray foamed, so there is an option presented to do 1in of spray foam around the rim joist/sill plate areas for air sealing and then just pin batts to the walls. Maybe in several years I will upgrade to the whole thing being spray foamed, but the batts are five thousand dollars cheaper.
My question is will the 1in spray foam air seal do anything? It is a $900 upgrade. I want the space to be air sealed well, but I feel like my rim joists hang differently than what I have seen and possibly will leak less air? I obviously know nothing so looking for some help haha.
Thanks!
