Closed cut shingle valleys work fine with strip shingles and laminated asphalt shingles.
Roof hog valley.
Gaf mastering the roof chapter 12 this video demonstrates the proper installation technique for installing roofing valleys.
A closed cut roof valley will have at least four layers of roof materials.
Weaving a shingle valley by dunn contracting 727 410 5717 james dunn.
A hog valley is a section of roof that is usually a lower pitch or angle of roof that collects a lot of water from the other two steeper roofs that flow into it.
Valleys are a prime leak area so it s important to be careful.
A flashing is a transitional roofing material that connects the roof material to some other building material or to another part of the roof.
The open woven and closed cut methods are demonstrated.
In either situation the leaking roof valley can be fixed by removing affected shingles and structural elements and upgrading your roof s flashing.
And damaged flashing is behind most roof leaks.