Step flashing redirects the water back onto the shingle.
Proper roof to wall flashing.
The metal flashing is formed with a hook edge and cleated on 12 centers.
4 inches should go up the house wall and 4 inches should go on top of the porch roof shingles.
Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape.
Do not seal housewrap or building paper to step flashing.
How to install roof flashing against a wall.
Use step flashing that has a 2 to 4 inch longer vertical leg than normal.
Use the metal break tool to bend the flashing lengthwise in the middle according to the angle of the roof joint.
Learn how to install it below.
The flashing extends up the wall at least 4.
At roof to wall intersections see figure 1.
Step 6 make a 10 degree bend on the shingle edge of the flashing approximately 1 2 inch from the edge.
Sidewalls on roofs covered with asphalt shingles wood shingles shakes and slate should be flashed using step flashing like you see here.
Even if one piece of step flashing fails the flashing and shingle below it start the process over again.
The flashing extends onto the roof a minimum of 2 inches 4 inches is preferable in more severe climate areas.
Recaulk the joints between the roof and the flashing.
Step flashing is a rectangular piece of flashing bent 90 degrees in the center.
Fasten loose nails and cover exposed nail heads with roofing cement.
Badly corroded flashing will need to be replaced.
Multiple pieces of the flashing will be installed in layers with shingles to ensure the water flows away from the wall.
Most flashing is 8 inches wide.
Continuous flashing against a sidewall is one way to install a roof but it s not the correct way.
Storm proof roof 2.
Roofing cement can dry out and crumble away exposing joints to water.
It is used for roof to wall flashing.
Step flashing consists of short pieces of flashing each installed to overlap the shingle in the course below and to be overlapped by the shingle in the course above.
Edge flashing and starter strip roofs peel off from the edges so it is critical to hold them tight with the roof deck sealed on the outside we turn to flashing the edges with metal and membranes metal drip edge flashing details roofing wrb flashing two ways to flash roof edges.