Roof Step Flashing Details

The vertical flange of the flashing is to extend up behind the adjoining siding.

Roof step flashing details.

Even if one piece of step flashing fails the flashing and shingle below it start the process over again. It may seem as if a single piece of flashing would offer more protection than many pieces of step flashing. Step flashings are to be installed one per course. Head flashings are used to direct water away from openings such as windows and doors.

Step flashing protects the joints between the roof deck and chimneys or dormers. So we instruct our roofers to run the ice barrier membrane and the roof underlayment up the sidewalls. We ask for 6 inches up the wall. Step flashing redirects the water back onto the shingle.

These are the key types of roof flashing you need to understand. Continuous flashing against a sidewall is one way to install a roof but it s not the correct way. Continuous flashing is also called apron flashing because it acts a lot like an apron. 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.

Step flashing fits to each course of shingles and appears to step up the wall of the chimney. This ensures that rain always. Vent pipe flashing fits over flues or pipes. Stepped flashing is used where a sloped shingled roof intersects a vertical wall.