Roof flashing is used to protect susceptible areas of your roof from water damage, generally an area such as a vertical dormer. A sky light is also a susceptible area that requires flashing. A roof slant is designed to allow water and elements to drain downward and off a roof. It is fair to say that water does drain down; however wind and elements can create an upward thrust that can cause damage to the area under the shingles.
Step flashing protects those seams located between the vertical wall and the slant of a roof. Problems can also arise at the point of exit from the roof if the water is not directed away from the structure. This is where your kick out flashing comes in to play. Installation is not complicated if you take your time and plan ahead.
Step 1 – Measure
As with any project having the right tools and materials is a key step to a quick and efficient completion. While you measure for your purchase of step flashing take into consideration all the areas of the roof you will need to install kick out flashing. Chimneys, dormers and bay windows are the most obvious; however do not overlook any area where water will drain directly onto a wall before hitting the ground. A small decorative overhang can direct water right up against a stucco wall and cause great damage over time.
Step 2 – Bend the Flashing
For purposes of this demonstration consider this installation for a dormer using galvanized kick out flashing. Galvanized flashing is economical and easy to work with. At the end of the step flashing installation you will bend the kick flashing to a degree that allows the water to run off away from the vertical wall. Most effectively this water should run into a gutter. Use your tin snipes if you need to cut a piece of the flashing.
Step 3 – Install the Flashing
Align the back side of the bent kick out flashing with the step flashing and shingle attached to the vertical wall. Run a small line of caulking down the end of the adjacent step flashing. Place the back edge of the kick out flashing over the caulking and attach with a galvanized nail to the vertical wall. This is a good time to check and caulk any exposed areas water may enter between the step flashing and the kick out flashing.
To insure that the kick out flashing is bent to an angle that will prevent any overflow from reaching the wall behind it, test the area by slowly pouring a gallon of water down the step flashing. Make any slight adjustments to the front angle of the kick out flashing confirming that the water will safely flow to an adjoining gutter. If a gutter has not been installed angle the kick out flashing away from the structure towards the ground.