Closed-cut-valley meaning

(roofing) A method of valley application in which shingles from one side of the valley extend across the valley while shingles from the other side are trimmed back a few inches from the valley centerline.
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A method of valley application in which shingles from one side of the valley extend across the valley while shingles from the other side are trimmed back approximately 2 inches from the valley centerline.
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