Roof Valley Leak

If a metal flashing has been used the most common problem is that the shingles were improperly cut.

Roof valley leak. If your roof valley leak is an old repair gone bad consider having a professional repair the leak properly. Roof leaks in a valley can be prevented. Valley roofing did an excellent job when they installed a new roof in my home back in august of 2019. 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.

Shingles are then bedded in cement going up the valley. A flashing is a transitional roofing material that connects the roof material to some other building material or to another part of the roof. 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.

Isolate areas when you run the hose. And damaged flashing is behind most roof leaks. Start low soaking the area just above where the leak appears in the house. 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.

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. If a leak is difficult to find enlist a helper and go up on the roof with a garden hose. Roof cement should be dabbed under the shingle corners. The edges are finished in a similar fashion to garcia s method.

Valley areas are prone to leak due to the lack of using proper materials. Most roofers that do shingles will use a heavy base paper instead of a rubber membrane. Sometimes an older home s roof is more prone to leaking in the roof valleys because of old repairs.