Clear any debris in the roof valley and surrounding area.
Fixing leaking roof valley.
Removal of debris collecting in the valleys and gutters will allow water to quickly drain away and protect shingles and flashing.
Move to the highest end of the valley and work your way down cleaning.
Re shingle roof valleys install ice and water shield under shingles or install metal roof flashing and re shingle the valley.
Using different metal to patch valley will cause corrosion.
And you can tar it but it s a real stop gap band aid like measure.
Take measurements of your roof flashing most flashing is 14 inches wide but yours may vary.
T o repair an open valley.
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.
Follow these three preparatory steps to get ready to fix the valley leak.
How to fix roof valley leaks.
The sealants and roof pitch used can crack and chip away over time.
If leaks continue to occur from ice dams consider installing roof edge heating cables.
Remove debris remove all debris from roof valleys so nothing is touching your roof.
The valley flashing laid over the joint where the two roofs meet should overlap the step flashing at least 2 in.
Most valleys use either aluminum or copper.
You can patch small holes with the same type of sheet metal valley is made of.
Inspect valley for holes all along joint.
In order to lay the flashing the shingles on the roof will have to be removed.
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.
Find them locally at hardware stores or home centers.