Re shingle roof valleys install ice and water shield under shingles or install metal roof flashing and re shingle the valley.
Fixing leaking roof valley.
Using different metal to patch valley will cause corrosion.
Clear any debris in the roof valley and surrounding area.
Find them locally at hardware stores or home centers.
The sealants and roof pitch used can crack and chip away over time.
Removal of debris collecting in the valleys and gutters will allow water to quickly drain away and protect shingles and flashing.
Most valleys use either aluminum or copper.
Sometimes an older home s roof is more prone to leaking in the roof valleys because of old repairs.
Inspect valley for holes all along joint.
Take measurements of your roof flashing most flashing is 14 inches wide but yours may vary.
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.
You can patch small holes with the same type of sheet metal valley is made of.
How to fix roof valley leaks.
Clean surface of valley with wire brush.
The right thing to do here is to pull a valley basically pull a valley apart and rebuild it.
Remove debris remove all debris from roof valleys so nothing is touching your roof.
Move to the highest end of the valley and work your way down cleaning.
In order to lay the flashing the shingles on the roof will have to be removed.
And you can tar it but it s a real stop gap band aid like measure.
T o repair an open valley.
If leaks continue to occur from ice dams consider installing roof edge heating cables.