xps insulation under crawl space vapor barrier

I’m building a home in NW AR on a foundation part basement and part  conditioned crawl space. In the crawl I plan to use 20 mil plastic as a vapor… I’m building a home in NW AR on a foundation part basement and part  conditioned crawl space. In the crawl I plan to use 20 mil plastic as a vapor…Read MoreGreenBuildingAdvisor