Fix Leaking Roof Valley

Just like in nature a valley on a roof is designed to collect water.
Fix leaking roof valley. The right thing to do here is to pull a valley basically pull a valley apart and rebuild it. If a leak is difficult to find enlist a helper and go up on the roof with a garden hose. If the ice and water shield is missing then you will have to remove the shingles on both sides along the valley put ice and water shield in place and re shingle the roof. And you can tar it but it s a real stop gap band aid like measure.
And if they put a second layer of shingles on they brought it up the valley but they didn t replace the valley it s probably leaking and cracking and split. Once the roof valley has begun to leak you will need to cover the valley with flashing in order to prevent a repeat of the problem. Start low soaking the area just above where the leak appears in the house. Isolate areas when you run the hose.
A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water. How to fix roof valley leaks remove debris remove all debris from roof valleys so nothing is touching your roof re shingle roof valleys install ice and water shield under shingles or install metal roof flashing and re shingle the valley. Because roof valleys function as a drain on the roof they receive as disproportionate volume of water every time it rains. In either situation the leaking roof valley can be fixed by removing affected shingles and structural elements and upgrading your roof s flashing.
For example soak the downhill side of a chimney first then each side then the top on both sides. If that water doesn. Roof valleys if not installed correctly are one of the most leak prone areas on the roof. Leaking roof valleys and how to fix them.