Foundations & Floors -

Air Sealing/Insulation

Guide describing the use of building cavities as supply or return ducts.

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 upgrade a crawlspace floor in an existing home by adding insulation.

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

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.