Building Codes Assistance Project

Issue: Inadequately sealed building envelopes can lead to significant air leakage that decreases the comfort of a residence by allowing moisture, drafts, and undesired noise to enter. Air leakage may also reduce indoor air quality by permitting dust and airborne pollutants to infiltrate the building. According to the Environmental Protection Agency, air leakage in a typical home accounts for 25 to 40 percent of its heating and cooling energy use -- a substantial loss of energy and money.

Options: HERS rating alternative compliance path; Blower door guided air sealing