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Guide describing how to insulate an existing foundation wall by adding spray foam insulation to the interior side of the wall.

Guide describing how to insulate a new foundation wall or an existing foundation wall by adding rigid insulation to the exterior side.

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

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.

Guide describing how to air-seal sill plates in single-family homes and multifamily buildings.

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

Guide describing how to apply water management strategies to below grade walls.