Flashing a humpy old roof valley requires a little give and take and a backup plan.
Roof repair valley flashing.
Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic.
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 repair roof flashing small holes or corroded spots in flashing can be easily repaired.
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.
Lile points out that valleys lined with roll roofing are not as durable.
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 other cases shingles are overlapped to make a valley and water from harsh rains can find a way under the shingles.
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.
A metal lining under the membrane secures that the valley will never puncture again.
Repairing a roof valley involves removing some shingles and installing a.
Toronto s roof repair specialists http www mrroofrepair ca show the cause of a major interior roof leak.
In order to lay the flashing the shingles on the roof will have to be removed.
This valley has seen its better days but the critical spot carrying water past the image.
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.
A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water.
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.
A crack in the valley can cause major damage and i.
Flashing is installed to surround roof features such as vents chimneys and skylights.
Metal flashing is used to divert water.
