Roof To Wall Step Flashing Detail

The flashing extends onto the roof a minimum of 2 inches 4 inches is preferable in more severe climate areas.

Roof to wall step flashing detail.

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. N tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape. Flashing joints are lapped 6 in the direction of water flow. Even if one piece of step flashing fails the flashing and shingle below it start the process over again.

The flashing extends up the wall at least 4. Guide to step flashing at building roof wall intersections. 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.

This process will continue up the entire roof. Factory shingle cut against the wall minimum 12 butted up snug. N at roof to wall intersections see figure 1. Same type of metal as the flashing material.

N use flashing cement at joints to help secure flashing. The flashing material should be 4 inches by 7 inches in length when it lies on the roof deck. The metal flashing is formed with a hook edge and cleated on 12 centers. Step flashing redirects the water back onto the shingle.

Where snow buildup is anticipated add a band of peel and stick membrane over the step flashing but under the sheathing wrap as shown. Step flashing needs to turn up a minimum of three inches up the sidewall. 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. Continuous flashing against a sidewall is one way to install a roof but it s not the correct way.