Rigid Foam Insulation Installed over Existing Foundation Slabs Description Guide describing how to insulate an existing slab floor by adding rigid foam insulation over the slab then installing a floating subfloor.
Insulation for Existing Crawl Space Floors Description Guide describing how to upgrade a crawlspace floor in an existing home by adding insulation.
Air Sealed, Insulated Basements Description Guide describing how to insulate a basement to improve the overall thermal performance of the building and provide more dry, usable conditioned space for home occupants and HVAC equipment.