Foundations & Floors -

Air Sealing/Insulation

Guide describing how to air-seal and insulate the floor above an unconditioned basement or crawl space.

Guide describing principles of insulating and air sealing band joists as a stand alone energy upgrade, or as part of creating a closed crawlspace.

Guide describing how to insulate an existing slab floor by adding rigid foam insulation over the slab then installing a floating subfloor.