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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 ways to air seal an attached garage in new and existing homes.

Guide describing how to air seal electrical wiring throughout a home.

Guide describing how to air seal the gap between the drywall shaft wall (i.e., common wall) and the structural framing between units in multifamily housing.

Guide describing how to air seal around plumbing and other piping.

Guide describing how to air seal sill plates in new and existing homes.

Guide describing how to conduct a home performance assessment before beginning retrofit projects in existing homes.

Guide illustrating how to insulate a floor over unconditioned space with conditioned space above by adding insulation and air sealing.

Guide describing how to upgrade a wall with a floor overhang (or cantilever) on an existing home by adding rigid insulating sheating and or closed-cell spray foam insulation and air sealing.

Guide with information about how to upgrade a garage ceiling when a portion of the interior of the house is located directly above the attached garage by adding insulation and air sealing.

Guide describing ways to reduce access to bugs, rodents and other pests through openings in a home.

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