An energy efficient home needs a sound and well sealed building envelope. The building envelope is the outer layer of the building that separates the living space from the outdoor environment, both above and below the ground. Many older homes have high heating requirements because of high rates of air leakage through gaps, cracks, or poorly insulated parts of this envelope.

A house is a system and each component influences the performance of the entire system. Insulation in walls, ceilings and basements; high performance windows and doors; ventilation and good sealing make for a sound building envelope that work together to create a healthy, comfortable and energy efficient house.

Find out how to improve the energy efficiency of your home in order to make your house healthier for you, the community and the environment.

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