Where should air sealing efforts be prioritized?

Prioritizing air sealing efforts in the attic is essential because it is a significant area for energy loss in multifamily buildings. The attic is often a major contributor to airflow issues, where heated or cooled air can easily escape or unwanted outside air can infiltrate the living space below. By sealing gaps, cracks, and penetrations in the attic, you can greatly improve the overall energy efficiency of the building, reduce heating and cooling costs, and enhance indoor comfort.

Furthermore, the attic frequently houses ductwork and ventilation systems, which can also be sources of energy loss if not properly sealed. Addressing air leaks in this area can lead to better control of the building’s air quality and temperature, making it a strategic focus for energy retrofits and improvements.

While other areas like the basement, living room, and garage also have their importance in air sealing, the attic's role in affecting the overall building performance through thermal control and energy efficiency is particularly critical, which justifies the prioritization of air sealing efforts there.