Insulating ground floor of closed crawl space?
My contractor wants to insulate the floor (ground) of our closed/conditioned crawl space, in addition to the foundation walls. I have never seen that recommended anywhere, and doubt the cost/benefit ratio would be worth it. Anybody know of any situations that would warrant this?
This would be in climate zone 4a, in a mixed humid zone. As we don’t plan to use a lot of AC, I would like to seal the crawl space from the house air and use a dehumidifier down there instead. Otherwise, we would be introducing unconditioned air into the crawl space. But I’ll need to discuss this with the building inspector. Thanks for any thoughts/suggestions.