Valleys are a prime leak area so it s important to be careful.
Roof hog valley.
And damaged flashing is behind most roof leaks.
A flashing is a transitional roofing material that connects the roof material to some other building material or to another part of the roof.
Weaving a shingle valley by dunn contracting 727 410 5717 james dunn.
The hog valley is much wider at the top than the bottom.
Closed cut shingle valleys work fine with strip shingles and laminated asphalt shingles.
A closed cut roof valley will have at least four layers of roof materials.
There is usually a wall that this valley meets at the narrow end causing water to accumulate at.
Gaf mastering the roof chapter 12 this video demonstrates the proper installation technique for installing roofing valleys.
One layer each of felt underlayment mineral surfaced roll roofing and two layers of shingles.