What is the closed-cut valley method in roofing?

• A. A method of valley treatment where shingles from one side extend across the valley, while shingles from the other side are trimmed 2" from the valley centerline. THE VALLEY FLASHING IS NOT EXPOSED.
• B. A valley technique where flashing is fully exposed in the valley.
• C. A valley method using metal sheets with visible overlap in the center.
• D. A valley treatment where both sides extend past the centerline and meet at the edge.

Answer: (A)

Closed-cut valley focuses on concealing the valley flashing by letting one side’s shingles extend across the valley while the opposite side is trimmed back to the valley centerline. This keeps the valley flashing hidden under the shingles, creating a neat, continuous surface and reducing the risk of leaks or wind-driven water at the valley edge. The detail of trimming the other side a short distance from centerline ensures a clean joint where the two sides meet and prevents exposed cuts along the valley. In practice, this approach emphasizes weather tightness and aesthetics by not exposing valley flashing. The other descriptions describe open valleys with exposed flashing, metal flashing with visible overlaps, or both sides extending past centerline in a way that would not produce the same closed, hidden-flashing detail.