Clear any debris in the roof valley and surrounding area.
Fix leaking roof valley flashing.
A metal lining under the membrane secures that the valley will never puncture again.
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.
And you can tar it but it s a real stop gap band aid like measure.
Follow these three preparatory steps to get ready to fix the valley leak.
Metal flashing is used to divert water.
Move to the highest end of the valley and work your way down cleaning.
If leaks continue to occur from ice dams consider installing roof edge heating cables.
You may want to carefully measure the flashing and only lift up as many shingles as you need to get that into the roof or you may want to lift up a number near to the valley in order to ensure that the roof is fully protected in the future.
The right thing to do here is to pull a valley basically pull a valley apart and rebuild it.
Place the shingles to one side for use later.
How to fix roof valley leaks.
Take measurements of your roof flashing most flashing is 14 inches wide but yours may vary.
Cut each side at the upper end of the valley to conform with the.
Remove debris remove all debris from roof valleys so nothing is touching your roof.
Removing the shingles in the valley area and preparing to install a rubber membrane a metal flashing was installed to give the rubber support for when people walk on the roof this will be the place where they step.
Step 3 lay the flashing.
Plug pinholes with roofing cement and patch holes up to about 3 4 inch in diameter with a patch from the same material as the flashing.
First roughen the area around the hole with a wire brush or sandpaper and then clean it.
Cut each side of the flashing at the lower end to conform with the corresponding edges of the roof using sheet metal cutters.
A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water.
Other roof designs call for metal roof valley flashing to form a solid metal water barrier.
Then reshingle sliding metal step flashing behind the fascia board the trim behind the gutter.
Small holes or corroded spots in flashing can be easily repaired.
