Typically flashing is installed using roofing nails and roofing cement.
How to install step flashing on existing roof.
Longer than the shingle s exposure.
Wide and 2 in.
The roof deck flange of step flashings are to be fastened to the surface of each shingle in a position whereby the next course of shingles will cover up hide the flashing from view.
Install the roofing screws vertically along each rib in the panel.
The first piece of step flashing needs one bend so that it laps cleanly over the corner flashing installed in the previous step.
Installing your roof flashing is going to be slightly different depending on the specific type that you re installing.
Once even a small section of roofing cement fails you ll have a leak.
But it doesn t work that way.
Cut step flashing pieces to be 10 in.
In order to properly install new flashing you ll have to remove the shingles surrounding your old flashing and then re lay them after installation.
Flashing is generally installed at any joints or edges in the roof where water could otherwise work its way in.
Bend the 10 in.
Proper installation of step flashing.
Step flashings are to be installed one per course.
Step flashing for chimneys.
Each piece of step flashing laps over the shingle below and under the shingle above.
Now notch the first step flashing so that it will bend to go around the chimney front and side as well as at the base.
Make sure the caulk joint between these two pieces is bedded evenly.
The washer under the screw head should seal to the surface of the panel without bulging or shifting.
Once the shingles have been installed lay the base flashing around the base of the chimney approximately 4 past each end.
Install a piece of step flashing over each shingle in a weave fashion.
This allows each step flashing piece to overlap the piece below.
Then sink one nail into the sidewall to hold the step flashing in place.
The bottom edge of the flashing should extend just below the nail line.
Length to extend 5 in.
It may seem as if a single piece of flashing would offer more protection than many pieces of step flashing.
When retrofitting step flashing you will need to slide the step flashing up and under the existing shingles.
Secure the screws but do not overtighten.
