Rigid panel
(重定向自Beadboard)
Rigid panel insulation is made from fibrous materials (fiberglass, rock and slag wool) or from plastic foam. They are sometimes sold in sections designed to fit tightly in standard wall cavities. When sold this way, they are called "batts", and they come in different thicknesses to match the depth of wall cavities, for example, approx. 5½ inches to match a 2 x 6 inch wall cavity.