BASC Search | Building America Solution Center

Wrong – A poorly sealed window and window well allow bulk water to enter the crawlspace from ground that slopes toward the structure

Publication Date

Mon, 09/01/2014 - 12:00

Before sealing and insulating the crawlspace, the windows were sealed, the window wells backfilled, and sumps pumps were installed that discharged to the gutter downspouts

Publication Date

Tue, 09/14/2021 - 12:00

Right – This crawlspace window was completely sealed off on the inside and outside with air barrier and water-proof materials and the window well was filled in to an above-grade height to prevent bulk water from entering the crawlspace

Publication Date

Mon, 09/01/2014 - 12:00

Right – Foundation drainage mat was installed over the waterproof membrane that covers the sealed crawlspace window

Publication Date

Mon, 09/01/2014 - 12:00

Water-proof materials cover the exterior side of crawlspace windows in a crawlspace retrofit, while foil-faced rigid foams seals and insulates the inside face of the openings

Publication Date

Mon, 09/01/2014 - 12:00

Right – Foil-faced insulation was added after the crawlspace was dried and sealed by diverting water runoff, sealing off crawlspace windows and vents, and adding sump pumps and exhaust fan ventilation

Publication Date

Mon, 09/01/2014 - 12:00

Water Management of Existing Crawlspace Floor

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

Capillary Break at Crawlspace Floor - Polyethylene Sheeting under Concrete Slab

Guide describing how to install a capillary break to help manage moisture in foundations.

Air Sealed, Insulated Basements

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 HVAC equipment.

Termite-Resistant Foundations and Walls

Guide describing techniques and measures for increasing the termite resistance of a home's foundations.

Rigid Foam Board Insulation for Existing Band Joists

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

Rigid Foam Board Interior Insulation for Existing Foundation Walls

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