Details concrete masonry roofing wrb flashing.
Install valley flashing existing roof.
Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing.
Apply an approximately 3 inch.
Install valley battens on both ends of the roof valley then attach first flashing 3 4 inches over the roof flange and another 3 4 inches over the fascia if any is present.
Install the valley battens on the sides of the roof that you want to place the valley flashing.
Two ways to flash roof edges.
Some roofers cut the shingles parallel to the flashing s center ridge.
Snipping off the corners of.
Others start with a 3 inch wide.
Place a piece of sheet metal under the shingles to make sure you will not damage the flashing.
Remember to caulk the underside of the flashing with a sealant.
So if you are installing a woven valley you must push the shingles snugly into the valley while not nailing within six inches of the valley center.
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.
No one of this affirmat.
Fold the top of the flashing over the ridge.
Place the flashing on the upper portion or the upper flange of the batten.
Install flashing on existing roof to extend the lifespan of your roof.
Step 6 install the flashing.
Finally reattach all shingles removed in the process.
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Recommended procedures of basic valley flashing installation.
To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch.
How to do it determine cuts.
The woven valley shingle installation method does not call for roofing cement relying instead on the weave pattern to protect from water infiltration.
Many roofers cut the shingles across because they say it s safer.
One common method is to lay the edge metal under the eaves membrane and over the rake.
Cut the bottom edge and fold it down over the drip edge.
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In this video i show you how i do the valleys on a shingle roof.
Install an underlayment centered in the roof valley.
Now nail this first flashing at both its far ends.
