Roof wall flashing seals the joint where a roof slope meets a vertical wall, including sidewall step flashing, headwall flashing and the kick-out at the bottom of the run. Repair means correcting missing or damaged pieces so water leaves the wall and lands in the gutter. It is a major category within Folsom roof flashing repair.
What roof wall flashing repair involves
Roof-to-wall junctions come in three types. A sidewall is where the roof slopes down along a wall. A headwall is where the roof slope runs up into a wall. At the bottom of a sidewall, a kick-out flashing turns water away from the wall and into the gutter. When the kick-out is missing, water pours down the wall behind the siding.
These joints sit at the border between the roof and the wall's water barrier. A good repair connects both: flashing goes under the wall's weather-resistant barrier and over the shingles. When the wall is stucco, this means cutting back the stucco and re-finishing it. Many leaks blamed on 'the roof' are really wall-flashing failures.
Common problems this repair solves
- Missing kick-out flashing at the end of a sidewall
- Headwall flashing without proper counter flashing
- Stucco or siding sealed directly to the roof surface
- Step flashing corroded behind wall cladding
- Gutter ends that dump water against the wall
Signs you may need roof wall flashing repair
- Staining or bubbling paint on the wall below a roof edge
- Water stains inside along the top of an exterior wall
- Rotted trim or siding at the bottom of a roof-wall joint
- Efflorescence or dark streaks on stucco beside the roof
- Mold or damp smell in a wall adjacent to the roof
How the repair process works
- Trace the joint. The provider follows the roof-wall line, noting the wall type and where the water is entering.
- Open the wall edge. Trim, siding or stucco is cut back so the flashing and weather barrier can be examined.
- Install flashing in order. New step, headwall or kick-out flashing is fitted from the bottom up and integrated with the barrier.
- Re-finish. The wall covering is repaired and sealed so the finished joint sheds water.
What a good repair achieves
- Keeps water out of wall cavities and framing
- Prevents rot and mold that spreads beyond the roof
- Protects stucco and siding finishes
Sidewall, headwall and kick-out: the three details that fail
A sidewall is a wall that runs alongside the roof slope. It uses step flashing covered by the wall cladding. A headwall is a wall that the roof slope runs up into. It uses a continuous apron flashing on the roof, with the wall's water barrier lapped over the top of it. A kick-out is a short angled piece at the bottom of a sidewall that throws water out into the gutter instead of down the wall.
Each detail has a typical failure. Sidewalls leak when steps corrode or are missing. Headwalls leak when the wall covering is sealed to the roof instead of lapped over the metal. Kick-outs fail by being left out entirely, which is why the bottom of many sidewalls shows staining, rot or mold in the wall below.
How water gets behind stucco and housewrap
Modern walls rely on a weather-resistant barrier behind the siding or stucco, with flashing overlapping it in shingle fashion: higher layers over lower. If the flashing is tucked behind the barrier at the wrong place, or if the barrier is lapped the wrong way, water slips behind it and cannot get out.
On stucco, small cracks at the roof line are not just cosmetic. They can lead directly to wall sheathing if the flashing beneath is missing or short. A repair usually involves cutting back the stucco, correcting the flashing and barrier, and patching the stucco so the transition sheds water.
Checking for hidden wall damage
Wall leaks often cause damage out of sight. Signs include soft or spongy trim at the bottom of the wall, paint bubbling in a vertical streak, musty odor in an upstairs room, or a baseboard that has swollen on the wall below the roof joint. A roofer or contractor can probe suspect areas to check for rot, and a moisture meter can reveal dampness behind intact surfaces.
If damage is found, ask whether the repair quote includes replacing damaged sheathing or framing, or whether that is a separate trade. Having the roof joint fixed without fixing a rotted wall will leave you with the same problem in a year or two.
Roof Wall Flashing Repair in Folsom: local considerations
Stucco is a common wall finish across the Sacramento region, and two-story fronts often put a lower roof against a tall wall, which is exactly where kick-out and headwall details matter. In neighborhoods such as Briggs Ranch and Lexington Hills, a leak near a second-story wall is worth checking at the roof edge.
The same joint may involve step flashing repair along the wall. Visit our Folsom roofing help homepage to see how the other flashing services relate.
Cost considerations
Cost depends on the length of the wall run, whether the wall is stucco or siding, whether finish repairs are included and how much hidden damage is found. A missing kick-out is a small fix; a long headwall behind stucco is larger. Prices vary by job.
Ask what happens to the wall finish after the repair, since stucco and paint patching can be a separate trade.
When to call a professional
Call a professional promptly, because hidden wall damage grows silently. Working at roof-to-wall joints often means ladders at second-story heights and cutting into the wall covering.
Roof Wall Flashing Repair FAQs
What is a kick-out flashing?
It is an angled metal piece at the bottom of a sidewall that directs water away from the wall and into the gutter.
Why does my wall stain below the roof line?
Water that runs down the wall behind the cladding often comes from a missing kick-out or damaged wall flashing.
Is wall flashing repair covered by roofing or siding trades?
It crosses both, so confirm the provider handles the wall finish or can coordinate it.