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.
Flashing roof to wall intersections.
Flexible flashing tape seals the eave to the wall.
Kick out flashing should be installed at the end of a roof wall intersection to divert water away from the wall and into gutters.
The metal flashing is formed with a hook edge and cleated on 12 centers.
Flashing joints are lapped 6 in the direction of water flow.
Do not seal housewrap or building paper to step flashing.
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.
Most mason contractors are diligently installing flashing and weep holes at the base of walls as well as at the window head and sill.
Above the roof sheathing.
I cut the tape so that it laps onto the housewrap above and 3 in.
Proper installation of flashing and counter flashing at the intersection of a vertical wall with a roof surface is required to avoid roof leaks.
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.
I use a wide piece of flexible flashing tape to protect the area between the subfascia and the wall.
Repair any damaged sheathing and framing.
Once the flexible flashing is set i apply a piece of housewrap along the wall where the fascia meets it.
Step and kickout flashing should be installed at all roof wall intersections to protect the wall and divert rainwater runoff into a gutter.
If the roof is metal or rubber membrane continuous flashing should be used rather than pieces of step flashing.
Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape.
At roof to wall intersections see figure 1.
The flashing extends up the wall at least 4.
