Proper Roof To Wall Flashing

Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape.

Proper roof to wall flashing.

How to install roof flashing against a wall. At roof to wall intersections see figure 1. Storm proof roof 2. The flashing extends onto the roof a minimum of 2 inches 4 inches is preferable in more severe climate areas.

Multiple pieces of the flashing will be installed in layers with shingles to ensure the water flows away from the wall. The metal flashing is formed with a hook edge and cleated on 12 centers. Fasten loose nails and cover exposed nail heads with roofing cement. Use step flashing that has a 2 to 4 inch longer vertical leg than normal.

Continuous flashing against a sidewall is one way to install a roof but it s not the correct way. Roofing cement can dry out and crumble away exposing joints to water. The flashing extends up the wall at least 4. Even if one piece of step flashing fails the flashing and shingle below it start the process over again.

Step 6 make a 10 degree bend on the shingle edge of the flashing approximately 1 2 inch from the edge. Most flashing is 8 inches wide. 4 inches should go up the house wall and 4 inches should go on top of the porch roof shingles. Step flashing is a rectangular piece of flashing bent 90 degrees in the center.

Sidewalls on roofs covered with asphalt shingles wood shingles shakes and slate should be flashed using step flashing like you see here. Badly corroded flashing will need to be replaced. 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. It s much easier to reseal the flashing than it is to patch a water stained wall or ceiling.

Flashing joints are lapped 6 in the direction of water flow. It is used for roof to wall flashing. Step flashing redirects the water back onto the shingle. Renew flashing seals by chipping out old caulking and mortar along the edges of the flashing.

Do not seal housewrap or building paper to step 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.