Then sink one nail into the sidewall to hold the step flashing in place.
How to install step flashing on existing roof.
Typically flashing is installed using roofing nails and roofing cement.
With step flashing you do a little flashing then a lot of roofing then a little more flashing and so on.
Make sure the caulk joint between these two pieces is bedded evenly.
Install a piece of step flashing over each shingle in a weave fashion.
Step flashing for chimneys.
Cut step flashing pieces to be 10 in.
Step flashings are to be installed one per course.
Flashing is generally installed at any joints or edges in the roof where water could otherwise work its way in.
This allows each step flashing piece to overlap the piece below.
The washer under the screw head should seal to the surface of the panel without bulging or shifting.
Secure the screws but do not overtighten.
Length to extend 5 in.
But it doesn t work that way.
Install the roofing screws vertically along each rib in the panel.
Continuous flashing against a sidewall is one way to install a roof but it s not the correct way.
Installing your roof flashing is going to be slightly different depending on the specific type that you re installing.
Bend the 10 in.
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.
Each piece of step flashing laps over the shingle below and under the shingle above.
Place the first screw about 7 inches from the bottom and each subsequent screw about 18 to 24 inches apart along the vertical run.
When retrofitting step flashing you will need to slide the step flashing up and under the existing shingles.
Longer than the shingle s exposure.
Wide and 2 in.
Once the shingles have been installed lay the base flashing around the base of the chimney approximately 4 past each end.
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.
The first piece of step flashing needs one bend so that it laps cleanly over the corner flashing installed in the previous step.
It may seem as if a single piece of flashing would offer more protection than many pieces of step flashing.
Once even a small section of roofing cement fails you ll have a leak.
