How To Repair Roof Valley Flashing

How to repair roof flashing small holes or corroded spots in flashing can be easily repaired.

How to repair roof valley flashing.

Published on jul 22 2017. Move to the highest end of the valley and work your way down cleaning. Take care not to place any fasteners in the exposed center area of the metal flashing. Measure the width of the sheet metal valley flashing.

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. Start at the upper row of shingles at the upper end of the. Follow these three preparatory steps to get ready to fix the valley leak.

How to install roofing paper in a valley section and install the valley flashing on top. Position an extension ladder against the lower edge of the roof near the valley that is 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. This video shows the water proofing paper that we installed after removing the.

Corroded spots and small holes in roof flashing can be easily repaired. Step 2 remove the shingles. And you can tar it but it s a real stop gap band aid like measure. Clear any debris in the roof valley and surrounding area.

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. 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. The right thing to do here is to pull a valley basically pull a valley apart and rebuild it.

Typical valley flashing is 14 inches wide. 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. First roughen the area around the hole with a wire brush or sandpaper and then clean it. 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.