How To Repair Valley Flashing On Roof

If leaks continue to occur from ice dams consider installing roof edge heating cables.

How to repair valley flashing on roof.

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. How to install roofing paper in a valley section and install the valley flashing on top. Cut each side of the flashing at the lower end to conform with the corresponding edges of the roof using sheet metal cutters. If this is a repair job the siding must also be removed and replaced with 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. Cut each side at the upper end of the valley to conform with the. How to repair roof flashing small holes or corroded spots in flashing can be easily repaired. First step flashing must be installed before the siding so that the siding can cover the top of the flashing.

And you can tar it but it s a real stop gap band aid like measure. The valley flashing laid over the joint where the two roofs meet should overlap the step flashing at least 2 in. Now nail this first flashing at both its far ends. 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.

A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water. Step 2 remove the shingles. Check the entire roof valley carefully to locate the source of these problems. 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 re. The right thing to do here is to pull a valley basically pull a valley apart and rebuild it. Step 6 install the flashing. Remember to caulk the underside of the flashing with a sealant.

In order to lay the flashing the shingles on the roof will have to be removed.