Roof To Wall Intersection Flashing

Figure 1 apron flashing at roof wall junction horizontal flashing.

Roof to wall intersection flashing.

Product overview the gibraltar roof to wall flashing is made from trusted 28 gauge galvanized steel. Install step and kick out flashing at all roof wall intersections to protect walls from water intrusion and install boot or collar flashing at all roof penetrations to protect roofs from leaks. Use step flashing that has a 2 to 4 inch longer vertical leg than normal. Above the roof sheathing.

Raked metal apron flashings must have tapered stop ends to the lower end of the flashing to divert water away from the back of the upstand and into the gutter and have a 5 minimum cross fall see roof to wall junction in build 160. Do not seal housewrap or building paper to step flashing. Flashing joints are lapped 6 in the direction of water flow. Proper installation of flashing and counter flashing at the intersection of a vertical wall with a roof surface is required to avoid roof leaks.

Repair any damaged sheathing and framing. Our page top photograph illustrates a successful installation of flashing and counter flashing along intersection of a roof surface with the side of a brick constructed dormer. Step and kickout flashing should be installed at all roof wall intersections to protect the wall and divert rainwater runoff into a gutter. At roof to wall intersections see figure 1.

The flashing extends up the wall at least 4. Flexible flashing tape seals the eave to the wall. If there is no metal flashing installed at the wall roof intersection or if the existing flashing is damaged improperly installed or allowing water to damage the wall remove the siding and any existing flashing to expose at least 8 inches of the wall. I use a wide piece of flexible flashing tape to protect the area between the subfascia and the wall.

Thru wall flashing originates with a vertical leg in contact with the exterior sheathing tucked or shingled up under the house wrap and a horizontal leg that extends all the way through the masonry to the exterior surface of the wall. I cut the tape so that it laps onto the housewrap above and 3 in. Most mason contractors are diligently installing flashing and weep holes at the base of walls as well as at the window head and sill. The flashing extends onto the roof a minimum of 2 inches 4 inches is preferable in more severe climate areas.

Roof to wall flashing is bent at a 110. It is designed to cover and protect roof to wall intersections from water infiltration. The flashing upstand is carried up under the cladding and wall underlay and the ridge flashing roofing flashing junction ridge flashing barge flashing stop end required to end of apron flashing. Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape.

82 build supplement flashingssection 4 roof wall intersections.