Proper Roof To Wall Flashing

At roof to wall intersections see figure 1.

Proper roof to wall flashing.

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. Badly corroded flashing will need to be replaced. Step flashing is a rectangular piece of flashing bent 90 degrees in the center.

Even if one piece of step flashing fails the flashing and shingle below it start the process over again. Flashing joints are lapped 6 in the direction of water flow. The flashing extends onto the roof a minimum of 2 inches 4 inches is preferable in more severe climate areas. Learn how to install it below.

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. Continuous flashing against a sidewall is one way to install a roof but it s not the correct way. Use step flashing that has a 2 to 4 inch longer vertical leg than normal.

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. 4 inches should go up the house wall and 4 inches should go on top of the porch roof shingles. Recaulk the joints between the roof and the flashing.

Storm proof roof 2. The metal flashing is formed with a hook edge and cleated on 12 centers. How to install roof flashing against a wall. Fasten loose nails and cover exposed nail heads with roofing cement.

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. It is used for roof to wall flashing. Use the metal break tool to bend the flashing lengthwise in the middle according to the angle of the roof joint.

Sidewalls on roofs covered with asphalt shingles wood shingles shakes and slate should be flashed using step flashing like you see here. 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.