Which method is essential in controlling air movement that affects moisture levels?

Controlling air movement is critical for regulating moisture levels within buildings, and air sealing gaps plays a fundamental role in this process. Air sealing involves identifying and sealing openings in the building envelope, such as around doors, windows, and other penetrations. When gaps are sealed, the movement of air that can carry moisture into and out of the building is significantly reduced, thereby helping to maintain desired humidity levels.

Moisture can enter a structure through uncontrolled air movement, leading to potential problems such as mold growth, damage to building materials, and decreased indoor air quality. By effectively sealing these gaps, air sealing directly addresses the pathways through which moisture can infiltrate, thereby promoting better moisture control within the building environment.

While sealing windows, insulating roofs, and increasing ventilation can all contribute to better energy efficiency and indoor comfort, they do not directly target the uncontrolled air movement that can change moisture levels as effectively as air sealing does. For instance, sealing windows might improve energy performance, but if there are still gaps elsewhere in the building, air movement can still occur, undermining moisture control efforts.