Even when insulated, homes can still have unnecessary heat loss due to the ability of heat to transfer through the wood framing. Because framing can comprise up to one-fourth of the wall in stud-framed walls, the studs can significantly contribute to heat loss. To address this, a continuous thermal blanket of rigid foam can be installed on the exterior side of the walls, either over the plywood or OSB sheathing or in place of the wood sheathing. In attics, attic insulation can be installed to a depth that will cover the tops of the ceiling joists. Basements or crawlspaces can be sealed and insulated along the walls so that the floor joists are completely in conditioned space.