What is a common reason for air leakage at the window to wall transition?

Air leakage at the window to wall transition is commonly attributed to improper installation or sealing. This is because the effectiveness of an air barrier relies heavily on the quality of workmanship at junctions, such as those between windows and walls. If the window is not properly installed or if the sealing materials are inadequately applied, gaps or voids can form, allowing air to infiltrate or escape.

Effective sealing at these transitions is crucial to maintaining a building's energy efficiency, occupant comfort, and overall performance. It minimizes the risk of moisture intrusion, which can lead to further issues like mold growth or degradation of building materials. Proper installation techniques, including the use of appropriate sealants, flashing, and caulking, are essential to prevent these problems and ensure that the air barrier continues to perform effectively.