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Foundations & Floors - Air Sealing/Insulation

The guides on this page have information about air sealing and insulating floors/foundations. Guides are presented in alphabetical order. Use the filters to the right of the page to further focus your search based on construction type or keywords.


Solution Center Guides


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 for HVAC equipment.

Guide describing how to create a capillary break at all crawlspace floors using polyethylene sheeting to manage moisture in crawlspaces.

Guide describing installation of sump pumps in the basement or crawlspace of a home.

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

Guide describing how to upgrade a crawlspace floor in an existing home by adding insulation.

Information guide describing how to assess crawlspaces and basements before proceeding with upgrades in existing homes.

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

Guide describing how to insulate closed crawlspace walls and band joist areas with rigid foam board insulation.

Guide describing the need for covers on sump pumps in the basement or crawlspace of a home.

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.