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.
Fix leaking roof valley.
And you can tar it but it s a real stop gap band aid like measure.
Inspect valley for holes all along joint.
Clean surface of valley with wire brush.
Re shingle roof valleys install ice and water shield under shingles or install metal roof flashing and re shingle the valley.
Start low soaking the area just above where the leak appears in the house.
A flashing is a transitional roofing material that connects the roof material to some other building material or to another part of the roof.
The right thing to do here is to pull a valley basically pull a valley apart and rebuild it.
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.
Remove debris remove all debris from roof valleys so nothing is touching your roof.
Our specialties include leaky roof repair replacement maintenance deck systems sheet metal installation stucco and plaster repair carpentry and wood repair window repair and replacement and other general construction repairs as well as remodel construction in the san gabriel valley north orange county and inland empire.
For example soak the downhill side of a chimney first then each side then the top on both sides.
A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water.
Isolate areas when you run the hose.
In order to lay the flashing the shingles on the roof will have to be removed.
In either situation the leaking roof valley can be fixed by removing affected shingles and structural elements and upgrading your roof s flashing.
And damaged flashing is behind most roof leaks.
Using different metal to patch valley will cause corrosion.
How to fix roof valley leaks.
Most valleys use either aluminum or copper.
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.