Covers or seals insulation with preformed plastic covers, canvas strips, sealant, or tape to secure insulation to structure, according to type of insulation used and structure covered, using staple gun, trowel, paintbrush, or caulking gun. Determines the amounts and selects required insulation material (in sheet, tubular, or roll form), such as fiberglass, foam rubber, Styrofoam, cork, or urethane, based on material's ability to retain heat, location, surface, shape, and equipment use.