The following month, we brought the attic insulation up to an R30 level. Then, in June, we installed aluminized solar sheathing on the roof. This is a thermal reflective plywood that keeps ...

Triple-pane glass is even better! Most new buildings must have R30–R60 insulation in ceilings, R15–R21 in walls, and R13–R30 in floors. The amount and type of insulation you have in your home depends ...