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 repair a shingle roof valley.
Typical valley flashing is 14 inches wide.
How to repair a leaking shingle woven roof valley.
Step 1 locate the leak.
Only nail at the edges with only enough nails to.
Start at the upper row of shingles at the upper end of the.
Take measurements of your roof flashing most flashing is 14 inches wide but yours may vary.
To secure the roof valley flashing nail it down carefully.
Then starting at the base of the.
I then move the shingle to the uppermost course on the roof plane line up the mark on the shingle with the valley center and again mark the corner.
To shingle out of the valley with laminated shingles lay a shingle down as a gauge and mark the corner at the bottom left and top right of the roof.
Step 2 tear down.
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.
Follow these three preparatory steps to get ready to fix the valley leak.
Clear any debris in the roof valley and surrounding area.
Ensure ice and water protector has been installed along the valley first.
Climb into the rafter below the roof with a good flashlight and look around for any water intruding through the roof.
In order to stop the leak in your roof you need to get to where the leak is.