How To Repair Roof Valley Flashing

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.

How to repair roof valley flashing.

Move to the highest end of the valley and work your way down cleaning. Measure the width of the sheet metal valley flashing. Follow these three preparatory steps to get ready to fix the valley leak. Take measurements of your roof flashing most flashing is 14 inches wide but yours may vary.

Clear any debris in the roof valley and surrounding area. How to repair roof flashing small holes or corroded spots in flashing can be easily repaired. 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 2 remove the shingles.

And you can tar it but it s a real stop gap band aid like measure. First roughen the area around the hole with a wire brush or sandpaper and then clean it. Typical valley flashing is 14 inches wide. In order to lay the flashing the shingles on the roof will have to be removed.

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. A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water. 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. This video shows the water proofing paper that we installed after removing the.

Start at the upper row of shingles at the upper end of the. Take care not to place any fasteners in the exposed center area of the metal 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. Published on jul 22 2017.

Corroded spots and small holes in roof flashing can be easily repaired. 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. The right thing to do here is to pull a valley basically pull a valley apart and rebuild it. First your roofer will roughen the area around the hole using a wire brush or sandpaper and carefully clean it.