According to the U.S. Department of Energy, air sealing is one of the most significant ways to increase the energy efficiency of a home.  This reduces energy costs, of course, but it also improves the occupants’ quality of life and the durability of the home itself.  And air sealing one’s home can take as little as one weekend to accomplish using easily available, inexpensive supplies.

To begin, inspect the home for air leakage at common sites, such as around door and window frames; cable, electric, and gas service entrances; and around brick, siding, and stucco exteriors.  Ensure that vents and exhaust fans which close do so completely.

Once leaks have been identified, correct them by using the appropriate materials.  Most leaks can be repaired using caulk and weatherstripping.  Caulk is best used for small cracks and gaps between joints, and comes in a variety of different compounds.  Take note of the material to be repaired, and check to be sure you use the appropriate compound.  Weatherstripping is most suited for sealing leaks around movable joints such as doors and windows.  It is also available in a variety of types and materials.

These improvements usually pay for themselves in less than one year, by reducing up to 20 percent of heating and cooling bills, and as much as 10 percent in overall energy costs.