Repair Siding: Use a Kick-Out Flashing to Stop RotUpdated: Sep. 24, 2018
Install this special flashing to stop or prevent rot
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The side wall flashing problem and solution
The solution to rotting sidewalls is a small piece of bent metal called a kickout flashing (at roofing suppliers), which simply directs all that water away from the wall. Kickout flashing installs just like standard step flashing, except that half of the kickout flashing hangs over the edge of the roof.
Install the kickout flashing
Photo 1: Slip in the flashing
Lift the bottom shingle and slip in the kickout flashing. Nail it to the sidewall (or glue it if nailing isn’t possible).
Inspect the sidewall around and underneath the fascia and inside the house for signs of moisture damage, and repair any rotted areas. Add felt, if needed, before nailing the new wood on, and prime the new wood on all four sides before installing it.
Install the kickout flashing underneath the first shingle (Photo 1). If the shingle already has flashing on it, the kickout flashing has to slip beneath it, and you’ll have to loosen or remove siding to do this. If the sidewall is stucco or solid wood like ours and you can’t open it to get flashing behind it, continue the step flashing to the peak of the roof, then cover the step flashing with cap flashing (Photo 2).
Required Tools for this Project
Have the necessary tools for this DIY project lined up before you start—you’ll save time and frustration.
- Caulk gun
- Drill/driver - cordless
- Pry bar
- Tin snips
Required Materials for this Project
Avoid last-minute shopping trips by having all your materials ready ahead of time. Here’s a list.
- Cap flashing
- Exterior caulk
- Kick-out flashing