Crawl Space Insulation | How to Insulate a Crawl Space
Take a look under your house. Damp dangling insulation is a sure sign of outdated or shoddy installation. If your house was built before energy-conserving building codes were standardized in 1990 you may find no insulation at all. The U.S. Dept. of Energy currently recommends insulation with an R-value of at least R-9 in floors.