Roof Repair Valley Flashing

Roof flashing is a thin material usually galvanized steel that professional roofers use to direct water away from critical areas of the roof wherever the roof plane meets a vertical surface like a wall or a dormer.

Roof repair valley flashing.

How to repair roof flashing small holes or corroded spots in flashing can be easily repaired. Install an underlayment centered in the roof valley. Removing the shingles in the valley area and preparing to install a rubber membrane a metal flashing was installed to give the rubber support for when people walk on the roof this will be the place where they step. Metal flashing is used to divert water.

A crack in the valley can cause major damage and i. In order to lay the flashing the shingles on the roof will have to be removed. Repairing a roof valley involves removing some shingles and installing a. Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic.

Flashing is installed to surround roof features such as vents chimneys and skylights. Then install a non corrosive metal valley flashing of 24 minimum width lap successive sheets of metal flashing a minimum of 12 inches and seal laps. Nrca lile recommends that roof valley flashing metal for open roof valleys should be 26 gauge 0 45mm galvanized steel or equivalent noncorrosive nonstaining metal. 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.

In other cases shingles are overlapped to make a valley and water from harsh rains can find a way under the shingles. 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. 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. Flashing a humpy old roof valley requires a little give and take and a backup plan.

This valley has seen its better days but the critical spot carrying water past the image. Toronto s roof repair specialists http www mrroofrepair ca show the cause of a major interior roof leak. First roughen the area around the hole with a wire brush or sandpaper and then clean it.