How To Repair Valley Flashing On Roof

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

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. Second step flashing needs to extend 8 to 14 inches above the shingles according to the national roofing contractors association nrca. How to repair roof flashing small holes or corroded spots in flashing can be easily repaired. Cut each side at the upper end of the valley to conform with the.

The valley flashing laid over the joint where the two roofs meet should overlap the step flashing at least 2 in. A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water. The right thing to do here is to pull a valley basically pull a valley apart and rebuild it. Step 6 install the flashing.

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. 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. And you can tar it but it s a real stop gap band aid like measure. How to install roofing paper in a valley section and install the valley flashing on top.

Check the entire roof valley carefully to locate the source of these problems. Remember to caulk the underside of the flashing with a sealant. First roughen the area around the hole with a wire brush or sandpaper and then clean it. First step flashing must be installed before the siding so that the siding can cover the top of the flashing.

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. 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. Now nail this first flashing at both its far ends.

If this is a repair job the siding must also be removed and replaced with the flashing.