That's a good site to check as well as these:
http://www.advancedenergy.org/buildi.../crawl_spaces/
Besure to check over their NC Residential Building Code section -- that's
very relevant to you -- as well as the technical reports. Obviously the
home you're looking at is not up to code.

http://www.advancedenergy.org/buildi...0Reference.pdf





" see:
http://www.buildingscience.com/bsc/r...ns/default.htm