Foundations & Floors -

Crawlspaces

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

Guide describing different options for providing seismic and thermal resistance for homes with basement foundations, crawlspace foundations, or crawlspace foundations with a "cripple" wall.

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

Vapor retarder plastic should not be installed over fibrous insulation on basement or crawlspace walls unless rigid foam or spray foam is installed directly against the concrete, behind the blanket insulation.

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 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.

Guide providing information about treating bulk water drainage issues and moisture control measures in existing basements and crawl spaces.