Exterior Insulation for Existing Foundation Walls Description Guide describing how to insulate a new foundation wall or an existing foundation wall by adding rigid insulation to the exterior side.
Insulation for Existing Crawl Space Floors Description Guide describing how to upgrade a crawlspace floor in an existing home by adding insulation.
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.
Spray Foam Interior Insulation for Existing Foundation Walls Description Guide describing how to insulate an existing foundation wall by adding spray foam insulation to the interior side of the wall.