Foundations & Floors -

Air Sealing/Insulation

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 wall with a floor overhang (or cantilever) on an existing home by adding insulation (rigid insulating sheathing and/or closed-cell spray foam) and air-sealing.

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