Which of the following is one of the major areas of air leakage?

The roof to wall transition is a significant area of air leakage due to the complex nature of the connection between these two structural elements. This area often experiences variations in temperature and pressure, which can create gaps or weaknesses where air can escape or enter the building envelope.

In many building designs, the roofing system is installed in conjunction with the wall systems, but the physical connection can sometimes be inadequately sealed or constructed, leading to potential air leakage. This is especially critical in climates where controlling air infiltration can greatly impact energy efficiency and indoor comfort levels. Ensuring that this transition is properly constructed and sealed is fundamental to achieving effective air barrier performance in a building.

While the foundation to wall connection, the door to wall connection, and the wall to ceiling junction are also important considerations in the overall air sealing strategy, the roof to wall transition is particularly susceptible due to its location and the different materials and structures involved.