Proper Roof To Wall Flashing

Flashing joints are lapped 6 in the direction of water flow.

Proper roof to wall flashing.

How to install roof flashing against a wall. Do not seal housewrap or building paper to step flashing. It is used for roof to wall flashing. The flashing extends up the wall at least 4.

Sidewalls on roofs covered with asphalt shingles wood shingles shakes and slate should be flashed using step flashing like you see here. It s much easier to reseal the flashing than it is to patch a water stained wall or ceiling. Continuous flashing against a sidewall is one way to install a roof but it s not the correct way. 4 inches should go up the house wall and 4 inches should go on top of the porch roof shingles.

Even if one piece of step flashing fails the flashing and shingle below it start the process over again. Roofing cement can dry out and crumble away exposing joints to water. Most flashing is 8 inches wide. 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.

Renew flashing seals by chipping out old caulking and mortar along the edges of the flashing. Learn how to install it below. Badly corroded flashing will need to be replaced. Use the metal break tool to bend the flashing lengthwise in the middle according to the angle of the roof joint.

Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape. Recaulk the joints between the roof and the flashing. Use step flashing that has a 2 to 4 inch longer vertical leg than normal. Step 6 make a 10 degree bend on the shingle edge of the flashing approximately 1 2 inch from the edge.

Step flashing redirects the water back onto the shingle. Fasten loose nails and cover exposed nail heads with roofing cement. 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. At roof to wall intersections see figure 1.

The metal flashing is formed with a hook edge and cleated on 12 centers. Storm proof roof 2.