A closed valley means that the valley flashing __________.

In roofing terminology, a closed valley refers to a specific type of valley treatment where the valley flashing is not exposed and is instead covered by shingles or other roofing materials. This method provides a clean and finished look to the roof, as the valley flashing, which is typically made of metal, is hidden from view.

The design purpose of a closed valley is to create a more seamless appearance, which is often considered more visually appealing in certain architectural styles. However, because the flashing is concealed, it also means that the flashing itself cannot be seen by an inspector or the homeowner without taking further steps. This characteristic aligns closely with the definition of a closed valley, distinguishing it from an open valley where the flashing is fully exposed and clearly visible.

Understanding the construction methods behind closed valleys is important, especially concerning potential issues such as water drainage and the buildup of debris, which may necessitate inspection and maintenance. However, the main feature that defines a closed valley is that the valley flashing is indeed hidden from sight.