Roof or ceiling insulation, insulation in exterior walls
- Roof or ceiling insulation, insulation in exterior walls
Any material that when placed between the interior surface of the building and the exterior surface of the building, reduces the rate of heat loss to the environment or heat gain from the environment. Roof or ceiling insulation refers to insulation placed in the roof or ceiling of the top occupied floor in the building. Wall insulation refers to insulation placed between the exterior and interior walls of the building.
U.S. Dept. of Energy, Energy Information Administration's Energy Glossary
Energy terms .
2014.
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