How To Repair Valley Flashing On Roof

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.

How to repair valley flashing on roof.

Second step flashing needs to extend 8 to 14 inches above the shingles according to the national roofing contractors association nrca. Step 6 install the flashing. The valley flashing laid over the joint where the two roofs meet should overlap the step flashing at least 2 in. If this is a repair job the siding must also be removed and replaced with the flashing.

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. In order to lay the flashing the shingles on the roof will have to be removed. Cut each side at the upper end of the valley to conform with the.

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

Remember to caulk the underside of the flashing with a sealant. If leaks continue to occur from ice dams consider installing roof edge heating cables. 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 install roofing paper in a valley section and install the valley flashing on top.

First roughen the area around the hole with a wire brush or sandpaper and then clean it. Cut each side of the flashing at the lower end to conform with the corresponding edges of the roof using sheet metal cutters. This video shows the water proofing paper that we installed after re. 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.

Install valley battens on both ends of the roof valley then attach first flashing 3 4 inches over the roof flange and another 3 4 inches over the fascia if any is present.