Replace all shingles you removed making sure their edges are at least 1 inch from the elevated center of the flashing.
Repair roof valley flashing.
Lap successive sheets of metal flashing a minimum of 12 inches and seal laps.
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.
Open valleys have metal flashing to protect this critical area of the roof.
Small holes or corroded spots in flashing can be easily repaired.
If leaks continue to occur from ice dams consider installing roof edge heating cables.
Use a metal cutter to alter the length of the flashing to ensure it lines up with your roof s lower edges.
Repairing a roof valley involves removing some shingles and installing a.
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.
Install an underlayment centered in the roof valley.
The valley flashing laid over the joint where the two roofs meet should overlap the step flashing at least 2 in.
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.
Recommended procedures of basic valley flashing installation.
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.
In order to lay the flashing the shingles on the roof will have to be removed.
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.
The edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak.
Then install a non corrosive metal valley flashing of 24 minimum width.
A crack in the valley can cause major damage and i.
Then reshingle sliding metal step flashing behind the fascia board the trim behind the gutter.
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.
In other cases shingles are overlapped to make a valley and water from harsh rains can find a way under the shingles.
