Insulating Vented Crawl Spaces
For vented crawl spaces, spray foam insulation can be applied to the underside of the subfloor. That creates an air seal that prevents air from leaking into the living room. Moreover, doing so ensures that moist air in the crawl space isn’t trapped, which would otherwise cause condensation and moisture problems in the long run.
Closed-cell spray foam provides excellent thermal protection, prevents air leakage, and, most importantly, helps control moisture. It acts as a moisture barrier, preventing moisture seepage from outside and condensation of moist air in the crawl space.