Basement/Crawlspaces

When insulating a conditioned basement, only the walls need to be insulated. The basement ceiling may be insulated for noise control between floors. "Conditioned" means the space is heated or cooled by a furnace or air conditioning unit.

Prior to insulating a basement, all foundation walls should be checked for water leakage and corrective action taken. Whenever possible, leaks should be sealed on the exterior surface. In addition, the band joist should be caulked and sealed to prevent air infiltration at the construction joints and around all penetrations such as plumbing, electrical lines, and HVAC and dryer vents.