vapor retarder: a material (typical types include paper, foil, plastic or spray foam) that is installed in the home to restrict the movement of moisture (in the form of water vapor) into or out of the home.
Vapor retarder
vapor retarder: a material (typical types include paper, foil, plastic or spray foam) that is installed in the home to restrict the movement of moisture (in the form of water vapor) into or out of the home.