588ade5c_es____GreenBuildingAdvisor_com__Criteria
[Component] Crawl space walls [Criteria] 
Insulation is permanently attached to walls. Exposed earth in unvented crawl spaces is covered with Class I vapor retarder, with overlapping joints taped.
What's All This Hot Air About Air-Sealing Measures? | GreenBuildingAdvisor.com
Criteria