What is a benefit of an air barrier system related to moisture control?

An air barrier system plays a crucial role in moisture control within a building by restricting moisture from entering the structure. This is essential in maintaining a dry and comfortable indoor environment. When air barriers are properly installed, they help to prevent infiltration of outside air, which often carries moisture. By minimizing this infiltration, the air barrier reduces the risk of condensation on cold surfaces within the building, thereby mitigating potential damage from mold growth, rot, and structural degradation.

While increased humidity indoors may seem beneficial in certain contexts, excessive humidity can lead to discomfort and health issues. Additionally, while some building systems may require drainage solutions, an effective air barrier reduces the need for such measures because it helps keep moisture out in the first place. Therefore, the primary benefit is its role in moisture control by directly limiting how much moisture can permeate the interior of the building, thereby promoting healthier and more energy-efficient living conditions.