4 inches should go up the house wall and 4 inches should go on top of the porch roof shingles.
Roof to wall siding flashing.
For deck flashing.
If your house has a roof line that extends past a corner of two walls make the first piece of step flashing a corner.
Kickout flashing installs just like standard step flashing except that half of the kickout flashing hangs over the edge of the roof.
It is used for roof to wall flashing.
Learn how to install it below.
The roofing contractors usually try to slide the roof flashing up behind lapped siding but many times this can be a chore and sometimes the exterior wall covering and or the existing water resistive barrier house wrap gets damaged in the process.
Once the flexible flashing is set i apply a piece of housewrap along the wall where the fascia meets it.
Step 6 make a 10 degree bend on the shingle edge of the flashing approximately 1 2 inch from the edge.
Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape.
Most flashing is 8 inches wide.
A 5 inch wide flashing will result in a 2 1 2 roof deck flange and 2 1 2 vertical wall flange.
Multiple pieces of the flashing will be installed in layers with shingles to ensure the water flows away from the wall.
Use step flashing that has a 2 to 4 inch longer vertical leg than normal.
I cut the tape so that it laps onto the housewrap above and 3 in.
Install roofing felt before starting step flashing.
I use a wide piece of flexible flashing tape to protect the area between the subfascia and the wall.
I made this video this morning and i hope it help explain the flashing wall detail where the siding meets the roof.
Likewise a 10 wide flashing will result in a 5 inch wide roof deck flange and a 5 inch vertical flange.
Use the metal break tool to bend the flashing lengthwise in the middle according to the angle of the roof joint.
Install the kickout flashing.
However the typical recommended width of step flashing ranges from 5 inches to 10 inches.
Flexible flashing tape seals the eave to the wall.
Run roofing felt up the wall about an inch higher than the wall side.
Do not seal housewrap or building paper to step flashing.
At roof to wall intersections see figure 1.
Step flashing is a rectangular piece of flashing bent 90 degrees in the center.
