Roof Valley Flashing Repair

Replace all shingles you removed making sure their edges are at least 1 inch from the elevated center of the flashing.

Roof valley flashing repair.

L shaped flashing is a versatile general use flashing used where a uniform or strengthened finish is needed on a 90 surface. You may want to carefully measure the flashing and only lift up as many shingles as you need to get that into the roof or you may want to lift up a number near to the valley in order to ensure that the roof is fully protected in the future. This video shows the water proofing paper that we installed after re. 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.

Extra nails may increase the risk of leaks. Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic. A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water. 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.

Lap successive sheets of metal flashing a minimum of 12 inches and seal laps. How to repair roof flashing small holes or corroded spots in flashing can be easily repaired. To secure the roof valley flashing nail it down carefully. In order to lay the flashing the shingles on the roof will have to be removed.

Then install a non corrosive metal valley flashing of 24 minimum width. Repairing a roof valley involves removing some shingles and installing a. Use roofing nails to secure the flashing in place driving nails at 1 foot intervals along the outer edges of each side from top to bottom. Only nail at the edges with only enough nails to hold it in place.

Use a metal cutter to alter the length of the flashing to ensure it lines up with your roof s lower edges. At the top edge of your roof valley check to make sure the flashing is properly angled to line up with the slope of the roof. Open valleys have metal flashing to protect this critical area of the roof. While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately.

First roughen the area around the hole with a wire brush or sandpaper and then clean it. How to install roofing paper in a valley section and install the valley flashing on top. The gibraltar building products l flashing protects your home the gibraltar building products l flashing protects your home from moisture infiltration where your wall meets your roof. In other cases shingles are overlapped to make a valley and water from harsh rains can find a way under the shingles.