How To Repair Roof Valley Flashing

Position an extension ladder against the lower edge of the roof near the valley that is repaired.

How to repair roof valley flashing.

Roof valleys and flashing are simple yet critical components of any roof. Take measurements of your roof flashing most flashing is 14 inches wide but yours may vary. Follow these three preparatory steps to get ready to fix the valley leak. Typical valley flashing is 14 inches wide.

The right thing to do here is to pull a valley basically pull a valley apart and rebuild it. 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. 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. Measure the width of the sheet metal valley flashing.

And you can tar it but it s a real stop gap band aid like measure. Move to the highest end of the valley and work your way down cleaning. Start at the upper row of shingles at the upper end of the. First roughen the area around the hole with a wire brush or sandpaper and then clean it.

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. Poorly installed flashing and or valleys is one of the most common causes of roof leaks so it s important to hire a professional with. A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water.