What structure is formed at the junction between the ceiling and the roof?

The structure that is formed at the junction between the ceiling and the roof is known as the soffit. The soffit serves several important purposes in a building’s construction. It typically provides a finished look to the area beneath the eaves while also helping to ventilate the attic space. Proper ventilation is crucial for maintaining airflow, reducing moisture build-up, and preventing issues like mold and mildew.

The soffit is often made of materials such as wood, vinyl, or aluminum, which can be styled or painted to match the home’s aesthetic. By closing off the underside of the eaves, soffits also protect that area from pests, debris, and weather elements.

In contrast, eaves are the edges of the roof that overhang the walls, which are responsible for directing water runoff. The ridge refers to the highest point of the roof where two roof slopes meet, while fascia is the board that runs along the lower edge of the roof, supporting the bottom row of tiles or shingles and providing an area for the gutter to be attached. Each of these elements plays a distinct role in roofing, but the soffit is specifically the structure situated between the ceiling and the roof line.