What are common air barrier connection details that must be considered in building design?

Common air barrier connection details that must be considered in building design include connections at the wall to roof, wall to foundation, and window-to-wall junctions. These areas are critical because they represent points where different building elements meet and create potential paths for air leakage if not properly sealed or detailed.

The wall to roof connection is particularly important as this interface can be a major area for water infiltration and air leakage due to the changes in material and structural elements. Similarly, the wall to foundation connection must be carefully designed to maintain continuity of the air barrier from the foundation up through the walls. Lastly, window-to-wall junctions are often overlooked but are vital in preventing air leakage around windows, which can significantly impact energy efficiency and indoor air quality.

In addition to these critical connections, other options present junctions that may not be as central to air barrier performance or are less commonly highlighted in air barrier design discussions. The focus on items in the correct option reflects fundamental junctions that play a significant role in establishing an effective air barrier system throughout the building.