Rigid Foam Board Interior Insulation for Existing Foundation Walls Description Guide describing how to insulate closed crawlspace walls and band joist areas with rigid foam board insulation.
Termite-Resistant Foundations and Walls Description Guide describing techniques and measures for increasing the termite resistance of a home's foundations.
Unvented, Insulated Crawlspaces Description Guide describing methods for insulating an unvented crawlspace or conditioned basement with rigid foam on the interior side of the walls to provide an insulated space for HVAC equipment.