Hi Matt,

First, a deep thank you for providing such a wonderful resource. I'm definitely on board with the idea of conditioning my crawlspace and want to do it right.

My one question is about using rigid foam insulation on the crawl space walls before covering them with the liner. It seems to me this will make the whole space warmer and dryer. In my crawl space the concrete walls are about 5 feet high and are below grade. The question I have is, how would you recommend installing your liner over this rigid foam insulation? Perhaps just bevel the top of the insulation so that the liner can conform to it as it anchors against the wall?

I reference this document, describing the benefits of insulating the crawl space walls:
http://www.buildingscience.com/documents/reports/rr-0401-conditioned-crawl-space-construction-performance-and-codes

Best wishes,
Eric