Roof Valley Flashing Repair

First roughen the area around the hole with a wire brush or sandpaper and then clean it.

Roof valley flashing repair.

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. Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic. While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately. In order to lay the flashing the shingles on the roof will have to be removed.

Then starting at the base of the valley center your first piece of flashing in the valley. 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. Repairing a roof valley involves removing some shingles and installing a. Lap successive sheets of metal flashing a minimum of 12 inches and seal laps.

Use a metal cutter to alter the length of the flashing to ensure it lines up with your roof s lower edges. Open valleys have metal flashing to protect this critical area of the roof. 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. Then install a non corrosive metal valley flashing of 24 minimum width.

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. Extra nails may increase the risk of leaks. 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 edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak.

L shaped flashing is a versatile general use flashing used where a uniform or strengthened finish is needed on a 90 surface. In other cases shingles are overlapped to make a valley and water from harsh rains can find a way under the shingles. To secure the roof valley flashing nail it down carefully. Install an underlayment centered in the roof valley.

Only nail at the edges with only enough nails to hold it in place. Replace all shingles you removed making sure their edges are at least 1 inch from the elevated center of the flashing. 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. How to install roofing paper in a valley section and install the valley flashing on top.