How To Repair Roof Valley 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.

How to repair roof valley flashing.

First roughen the area around the hole with a wire brush or sandpaper and then clean it. 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. Take measurements of your roof flashing most flashing is 14 inches wide but yours may vary. How to install roofing paper in a valley section and install the valley flashing on top.

Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic clip the top corner of shingles along valleys to keep water flow toward center of valley. First your roofer will roughen the area around the hole using a wire brush or sandpaper and carefully clean it. Check the entire roof valley carefully to locate the source of these problems. Clear any debris in the roof valley and surrounding area.

Take care not to place any fasteners in the exposed center area of the metal flashing. How to repair roof flashing small holes or corroded spots in flashing can be easily repaired. 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. The right thing to do here is to pull a valley basically pull a valley apart and rebuild it.

Step 2 remove the shingles. Corroded spots and small holes in roof flashing can be easily repaired. Move to the highest end of the valley and work your way down cleaning. Position an extension ladder against the lower edge of the roof near the valley that is repaired.

Typical valley flashing is 14 inches wide. Your roofer may simply cork pinholes using roofing cement and effectively patch holes using a patch cut out from the same material the flashing is made of. Start at the upper row of shingles at the upper end of the. Measure the width of the sheet metal valley flashing.

This video shows the water proofing paper that we installed after removing the. 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. A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water. In order to lay the flashing the shingles on the roof will have to be removed.