Roof Valley Leak

This method is a similar method to what mike guertin calls a long island valley which runs shingles from the first slope past the valley and up the second slope.

Roof valley leak.

The sealants and roof pitch used can crack and chip away over time. Isolate areas when you run the hose. The roofing nails are fine so long as the lead of the roof valley is intact but once it starts to crack or fracture due to water pressure corrosion or other damage the nail provides a space for water to run into the home. Shingles are then bedded in cement going up the valley.

Valley roofing did an excellent job when they installed a new roof in my home back in august of 2019. Most roofers that do shingles will use a heavy base paper instead of a rubber membrane. If a metal flashing has been used the most common problem is that the shingles were improperly cut. A flashing is a transitional roofing material that connects the roof material to some other building material or to another part of the roof.

We call an exterminator and he notices that the mesh for the chimney the eaves and gable vents are missing allowing rodents to enter my home trough the roof. The edges are finished in a similar fashion to garcia s method. Roof leaks in a valley can be prevented. And damaged flashing is behind most roof leaks.

In either situation the leaking roof valley can be fixed by removing affected shingles and structural elements and upgrading your roof s flashing. Valley areas are prone to leak due to the lack of using proper materials. Roof cement should be dabbed under the shingle corners. If your roof valley leak is an old repair gone bad consider having a professional repair the leak properly.

Start low soaking the area just above where the leak appears in the house. Most shingle installers will use a thick 30 lb paper as a base for the valley. Many roof valley leaks are caused by roofing nails that have been poorly placed and are acting as a dripper feeding water through from the roof above.