Foundations & Floors -

Air Sealing/Insulation

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

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

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