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.

Fast forward to october of 2019 we start to have a rodent problem in our home. Most roofers that do shingles will use a heavy base paper instead of a rubber membrane. 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.

Isolate areas when you run the hose. Valley areas are prone to leak due to the lack of using proper materials. Roof cement should be dabbed under the shingle corners. If a leak is difficult to find enlist a helper and go up on the roof with a garden hose.

In either situation the leaking roof valley can be fixed by removing affected shingles and structural elements and upgrading your roof s flashing. Most shingle installers will use a thick 30 lb paper as a base for the valley. 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. Roof leaks in a valley can be prevented.

The sealants and roof pitch used can crack and chip away over time. 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. 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.

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. Sometimes an older home s roof is more prone to leaking in the roof valleys because of old repairs. If your roof valley leak is an old repair gone bad consider having a professional repair the leak properly.