Step flashing redirects the water back onto the shingle.
Roof to wall step flashing detail.
N at roof to wall intersections see figure 1.
Continuous flashing against a sidewall is one way to install a roof but it s not the correct way.
Flashing joints are lapped 6 in the direction of water flow.
On a high wind wall low pitch vertical caulk at the roof edge of the flashing for insurance.
Next install the step flashing with the next course of shingles over top of it.
Same type of metal as the flashing material.
Where snow buildup is anticipated add a band of peel and stick membrane over the step flashing but under the sheathing wrap as shown.
Kick out flashing is a piece of flashing that hangs over the edge of the roof helping to divert water away from the adjacent wall or around any obstacles that the roof may butt into.
Even if one piece of step flashing fails the flashing and shingle below it start the process over again.
N use step flashing that has a 2 to 4 inch lon ger vertical leg than normal.
N tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape.
The flashing extends onto the roof a minimum of 2 inches 4 inches is preferable in more severe climate areas.
N use flashing cement at joints to help secure flashing.
This process will continue up the entire roof.
The flashing material should be 4 inches by 7 inches in length when it lies on the roof deck.
If you wanted to horizontal caulk it would only be at the top of the flashing.
The flashing extends up the wall at least 4.
The metal flashing is formed with a hook edge and cleated on 12 centers.
It may seem as if a single piece of flashing would offer more protection than many pieces of step flashing.
Integrate all step flashings with the sidewall sheathing wrap by slipping the upper legs of the step flashing under the sheathing wrap figure 1 6 at left.
