When air sealing a home, where should the process typically begin?

Starting the air sealing process at both the top and bottom of the structure is crucial for effectively minimizing air leaks. Beginning at the top, such as around attics or rafters, aims to tackle the significant gaps where heated or cooled air can escape, which often are located near the roofline. This area can be particularly vulnerable, especially where ductwork and vents penetrate.

Simultaneously addressing the bottom areas, including basements or crawl spaces, helps seal off entry points that allow outside air, dampness, or contaminants to infiltrate the living space. This dual approach ensures that the key areas which contribute to energy loss and comfort issues are dealt with comprehensively.

By sealing both the top and bottom, it creates a more effective barrier against air movement, improving the overall thermal efficiency of the home and reducing energy costs. Focusing on just one area would neglect the other critical zones that play a role in air leakage. As a result, targeting both zones maximizes the effectiveness of the air sealing effort.