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 leaking valleys on a roof.
Roof valleys are troughs that discard runoff water where two sections of sloped roof meet.
Many roof valley leaks are caused by roofing nails that have been poorly.
The valleys on many older houses comprise layers of roofing paper which.
Experts recommend that you give yourself 8 to 10 inches of clearance on each side of the valley.
And you can tar it but it s a real stop gap band aid like measure.
How to repair valleys on a roof.
The right thing to do here is to pull a valley basically pull a valley apart and rebuild it.
Step 2 remove the shingles.
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.
Step 4 replace the shingles.
Find the place where that leak is coming from.
Step 3 lay the flashing.
Pull out the nails with the bar.
Use a nail bar to loosen the shingles in the affected area insert the bar under a shingle and pry upward at a the location of each nail to loosen a nail.
Step 1 find the cause.
Move to the highest end of the valley and work your way down cleaning shingles from both sides of the valley whether they re damaged or not.