Roof-wall junction air sealing refers to the process of sealing the area where the roof meets the walls of a building to prevent air leakage. This junction is a common source of drafts, heat loss, and moisture intrusion.

Proper air sealing in this area helps improve energy efficiency, reduce heating and cooling costs, prevent water damage, and enhance indoor comfort by maintaining consistent temperatures. It is typically done using caulking, spray foam, or weatherstripping to close gaps and cracks, ensuring a tight seal.