Louisiana Roof-to-Wall Leak Guide
Kick-Out Flashing in Louisiana: Stop Roof-to-Wall Leaks
Kick-out flashing is the small diverter at the bottom of a sloped roof-to-wall intersection. Its job is to turn concentrated roof runoff into the gutter before water can wash the siding, slip behind the wall covering, or damage the sheathing below. On Louisiana homes, that small detail matters because heavy rain and wind-driven water can expose a weak roof-wall transition quickly.
Updated August 21, 2026
Quick Answer: What Does Kick-Out Flashing Do?
It catches the final stream of water traveling down the step flashing and redirects it away from the wall and into the gutter. A correct detail must work with the shingles, step flashing, water-resistive barrier, siding, roof-edge metal, and gutter entry. A piece of metal fastened to the face of the wall or covered with sealant is not the same as a properly integrated kick-out.
Where it belongs
At the lower end of a sloped roof-to-wall intersection, typically where that flashing run approaches an eave and gutter.
What it protects
Siding, trim, fascia, soffit, housewrap or another WRB, wall sheathing, insulation, and interior finishes.
What repair requires
Finding the actual water path, opening enough of the assembly to inspect it, and restoring every layer in drainage order.
A Small Part of a Larger Drainage System
What Is Kick-Out Flashing?
Kick-out flashing, sometimes called diverter flashing, is formed metal installed where a roof-to-wall flashing run ends. Water moving down the shingles and step flashing reaches the diverter, turns away from the wall, and enters the gutter or another planned drainage path.
The important word is integrated. The upper portion must receive water from the step-flashing sequence. The wall side must work with the WRB behind the siding. The lower portion must discharge where water can continue safely. If any layer laps backward, stops short, or sends water behind another material, the visible metal may look neat while the wall remains vulnerable.
Kick-out flashing and step flashing are not interchangeable
Step flashing manages water along the sloped roof-wall joint. Kick-out flashing handles the termination at the bottom of that run. The wall needs both details when the geometry calls for them, installed so each piece drains onto the next.
Why Louisiana Homes Expose Weak Details
Heavy Rain Makes the Roof-Wall Corner a High-Risk Area
A roof plane can collect water from an area much larger than the few inches visible at the corner. During a hard Louisiana downpour, that runoff becomes a concentrated stream. Valleys, upper roof slopes, long shingle runs, wind direction, gutter position, and debris can add even more water to one transition.
When the diverter is missing or undersized, runoff may travel over the face of the siding, behind the cladding, along the fascia, or into the soffit. The problem may appear only during rain from one direction, which is why a dry-weather visual inspection or a quick bead of caulk can miss the real path.
Fast roof runoff
Intense rain can send a larger stream toward the corner than the visible detail suggests.
Wind-driven water
Rain can move sideways and reach laps or wall transitions that stay dry during a light vertical shower.
Hidden drying problems
Humid conditions can slow drying when moisture reaches sheathing, framing, or insulation behind the exterior finish.
Storm-to-storm variation
A transition may leak only when rain intensity, wind direction, and gutter conditions align.
Clues Worth Investigating
Signs of a Missing or Failed Kick-Out Flashing Detail
One symptom does not prove that kick-out flashing is the only cause. These signs show where a qualified inspection should focus and whether nearby roof, wall, and gutter components also need review.
Water streaks below the corner
Dark fan-shaped staining, algae, dirt trails, or repeated wetting on the siding can show that runoff is bypassing the gutter.
Paint or trim deterioration
Peeling paint, swollen trim, soft fascia, open joints, or deteriorated caulk near the roof-wall termination can point to repeated moisture exposure.
Soffit or interior staining
Discoloration below the eave, a musty odor, damp drywall, or a stain at an interior ceiling-wall corner may indicate that water has moved beyond the surface.
A recurring “repair”
If caulk or face-applied metal keeps failing at the same corner, the underlying drainage layers may never have been restored.
These symptoms have look-alikes
Damaged step flashing, a roof-wall membrane problem, siding or WRB defects, a short roof edge, gutter overflow, a clogged outlet, or a nearby valley can create similar staining. The repair should follow the confirmed path of water, not the location of the first visible stain.
Homeowner-Safe Observations
How to Check the Area Without Climbing or Flood Testing
Start from the ground or from an accessible window. Use a phone camera with zoom to photograph the roof-to-wall termination, gutter entry, siding below the corner, soffit, and fascia. Take the same views when the area is dry and after a rain event if you can do so safely.
- Photograph the full corner. Include enough roof and wall to show where runoff approaches the transition.
- Look for a visible diverter. A formed piece should turn away from the wall at the bottom of the flashing run and discharge toward the gutter.
- Document moisture clues. Note wet siding, overflow, drip lines, soffit staining, paint changes, or an interior stain and when they appear.
- Check the gutter from a safe location. Look for sagging, debris, standing water, an overflowing corner, or a downspout that may be restricting discharge.
- Share the photos before the visit. Wider and close-up views help the estimator prepare, although hidden integration still requires an on-site evaluation.
Do not climb onto the roof or run a DIY hose test
A wet roof is hazardous, and uncontrolled testing can force water into a wall that was not leaking under normal conditions. It can also confuse the diagnosis by wetting several components at once. If controlled water testing is appropriate, it should be planned and performed by a qualified professional with someone monitoring the interior.
Diagnose the Whole Transition
Five Components That Must Work Together
| Component | Its job | What can go wrong |
|---|---|---|
| Step flashing | Moves water down the sloped roof-wall joint through overlapping pieces coordinated with the shingles. | Missing pieces, reverse laps, exposed fasteners, reused damaged metal, or a surface-caulked joint. |
| Kick-out flashing | Turns the final water stream away from the wall and toward the gutter. | Missing, too small, flattened, mounted on the surface, or discharging behind the gutter. |
| WRB or drainage plane | Drains incidental water behind the cladding back toward the exterior. | Cut, missing, torn, lapped backward, or disconnected from the flashing. |
| Roof-edge metal | Controls water at the shingle edge and protects the roof perimeter and fascia as specified for the assembly. | Short coverage, conflicting laps, gaps, or a shape that sends water behind the gutter or fascia. |
| Gutter and downspout | Receive the diverted runoff and move it away from the home. | Poor pitch, sagging, blocked outlets, inadequate discharge, or a gutter position that interferes with the diverter. |
Repair the Drainage Path, Not the Stain
How a Proper Kick-Out Flashing Repair Is Planned
The exact method depends on roof covering, wall cladding, gutter position, concealed damage, and access. A reliable repair usually requires enough selective removal to see how the existing layers are connected. Covering the corner without inspecting the hidden assembly can leave the original leak path in place.
Trace the likely entry path
Review exterior symptoms, interior clues, roof geometry, step flashing, roof-edge metal, wall finish, and gutter behavior before choosing the scope.
Open only what is needed
Remove selected siding, trim, shingles, soffit, or gutter components as the assembly requires so concealed flashing and WRB can be evaluated.
Inspect the substrate
Check sheathing, framing, fascia, and nearby materials for moisture damage. Any additional work should be documented and approved before it is covered.
Restore the drainage layers
Repair the WRB and integrate compatible flashing materials in shingle fashion so each upper layer drains over the layer below.
Install the diverter
Fit the kick-out to the roof-wall geometry, final step flashing, roof-edge detail, wall drainage plane, cladding, and gutter entry.
Reassemble and document
Restore removed materials, maintain required clearances, review the completed drainage path, and keep photos of concealed work for the project record.
Sealant is a secondary material
Compatible sealant may be used at specific joints or terminations required by the selected system. It should not replace shaped flashing, correct laps, WRB integration, or a clear drainage path.
No Universal Online Calculator
How Kick-Out Flashing Size and Placement Are Determined
A useful diverter must be large enough to intercept the expected runoff and send it into the intended drainage path. That cannot be determined from shingle exposure or gutter size alone. Roof area, slope, valleys, upper-roof discharge, wall position, overhang, gutter setback, cladding thickness, local rainfall exposure, and the selected flashing system all affect the detail.
Does it reach the flow path?
The diverter must project far enough to catch runoff instead of allowing water to pass behind it or wash the wall.
Is the upstand adequate?
The shape must control the anticipated stream without creating a backward lap or a pocket that traps debris.
Where does it discharge?
The lower edge should send water into the gutter or another approved drainage location, not between the gutter and fascia.
Can the wall drain?
The flashing must connect to the WRB and allow the cladding assembly to manage incidental moisture as intended.
Current code requirements, product approvals, roofing and cladding instructions, and the actual field condition govern the final detail. A generic “two-inch” or “six-inch” answer is not a substitute for fitting the complete assembly.
The Gutter Receives Water; It Does Not Create the Turn
Will a Larger Gutter Fix a Missing Kick-Out Flashing?
Usually not. A larger gutter can provide more water-handling margin, but it cannot redirect runoff that is already traveling behind the siding or past the gutter mouth. The kick-out creates the turn; the gutter receives the water and carries it to an outlet.
The gutter still matters to the diagnosis. A sagging trough, clogged outlet, poor pitch, short gutter run, valley discharge, or badly positioned end cap can cause overflow that looks like a flashing failure or intensify a real one. Both components should be reviewed before work is divided between roofing, siding, and gutter crews.
Flashing problem
Water follows the roof-wall joint or disappears behind the cladding before it can enter the gutter. The drainage layers need correction.
Gutter problem
Water reaches the trough but spills because the run, outlet, slope, support, debris load, or discharge path cannot handle it.
Combined problem
A weak diverter and an overflowing gutter wet the same corner. Coordinating both repairs is usually stronger than treating them separately.
The Wall Finish Changes the Access Plan
Kick-Out Flashing With Vinyl, Fiber Cement, Brick, or Stucco
The flashing principle stays the same, but the removal, drainage, clearance, and restoration details change with the wall assembly. Manufacturer instructions and approved project details should govern the final work.
Vinyl siding
Vinyl can hide water moving on the WRB or sheathing. Selected panels and accessories may need removal so the wall drainage plane and roof clearance can be restored without locking the siding in place.
Fiber-cement siding
Board ends, trim, flashing, fasteners, finish, and roof clearance require careful planning. Damaged or tightly installed pieces may need replacement rather than forced reuse.
Brick veneer
The visible corner may conceal flashing and drainage defects behind the veneer. Weeps, through-wall flashing, roof-wall integration, and access limitations may require a broader masonry-aware scope.
Stucco or adhered finishes
A face-mounted patch can trap water. Repair may require cutting back and rebuilding finish layers so the kick-out and drainage plane connect correctly.
Why the Leak Comes Back
Common Kick-Out Flashing Installation Mistakes
Metal attached over siding or trim may redirect some visible runoff while water continues behind the assembly.
An undersized or flattened piece may not intercept runoff from a long roof plane or nearby valley.
If an upper material drains behind a lower one, water can enter even when every component is present.
Replacing visible flashing without reconnecting the wall drainage plane leaves a hidden break behind the siding.
Sealant exposed to movement, heat, moisture, and debris is not a durable substitute for a formed drainage detail.
A gutter end cap or roof-edge conflict can trap water or send the diverter behind the trough instead of into it.
Insufficient clearance can hold moisture, collect debris, complicate future roof work, and conceal flashing defects.
Without documentation, the homeowner cannot verify WRB repair, flashing sequence, or hidden substrate work after the wall is closed.
Coordinate Work Before Materials Are Closed
When Is the Best Time to Correct the Detail?
During roof replacement
New roofing work can provide access to step flashing, shingles, underlayment, and roof-edge components. The wall-side integration still has to be included in the written scope.
During siding or exterior-wall work
When cladding is removed, the WRB and concealed sheathing are easier to inspect. Roofing and gutter details should be coordinated before the wall is closed.
During gutter or fascia work
Opening the eave may expose a weak corner, but access from below alone may not be enough to restore step flashing or the wall drainage plane.
As a stand-alone leak repair
A localized retrofit is often possible when the surrounding roof and wall remain serviceable. The proposal should identify what will be removed and how it will be restored.
Replace Guesswork With a Written Scope
What a Kick-Out Flashing Estimate Should Explain
A useful proposal should describe more than “install flashing.” Ask the contractor to identify the suspected leak path, the materials that need removal, the hidden layers that will be reviewed, and how the completed detail will drain into the gutter.
- The exact roof-to-wall corner included in the work
- The likely source of water and any competing causes still under review
- Which shingles, siding, trim, soffit, fascia, or gutter components will be removed
- How step flashing, kick-out flashing, roof-edge metal, and WRB will be integrated
- How concealed sheathing, framing, or fascia damage will be documented and priced if found
- Whether existing materials can be reused and how unavailable colors or profiles will be handled
- How the gutter entry, outlet, pitch, and downspout will be evaluated
- Which current manufacturer instructions, approved products, and local requirements apply
- What photos, warranty information, and maintenance guidance will be provided at completion
Cost Follows Access and Concealed Conditions
What Affects Kick-Out Flashing Repair Cost?
There is no reliable flat online price because the visible diverter may be the smallest part of the work. Cost changes when the repair requires opening the roof, wall, soffit, fascia, or gutter and when moisture damage is discovered behind those finishes.
Access
Roof height and pitch, scaffolding or lift needs, landscaping, tight side yards, and safe working space.
Materials removed
Shingles, siding, trim, stucco, soffit, fascia, gutter sections, and accessories that must be restored or replaced.
Hidden damage
Soft sheathing, deteriorated fascia, damaged framing, wet insulation, interior finishes, mold concerns, or pest activity.
System coordination
Step flashing, WRB, roof-edge metal, cladding details, gutter position, outlet location, and downspout discharge.
Material matching
Existing siding profile, trim color, shingle availability, metal finish, and whether removed products are still serviceable.
Permits or specialized design
Local requirements and complex wall, masonry, or low-slope conditions can change the inspection and documentation path.
The strongest estimate separates known work from concealed-condition allowances. If the wall must be opened before damage can be measured, the proposal should explain how additional work will be photographed, priced, and approved.
Local Roof, Siding, and Gutter Coordination
Kick-Out Flashing Evaluation in Southeast Louisiana
Southern Home Improvement Center evaluates roof-to-wall leaks for homeowners in Slidell and the Northshore, New Orleans and Jefferson Parish, Mandeville and Covington, Baton Rouge, and nearby Southeast Louisiana communities. Project availability depends on location and scope.
Slidell and the Northshore
Roof-wall transitions exposed to repeated heavy rain, storm winds, mature trees, and high humidity.
New Orleans and Jefferson
Older additions, tight property access, multi-level rooflines, aging siding, and recurring corner leaks.
Mandeville and Covington
Complex roof planes, tree debris, long gutter runs, and roof-to-wall details stressed by Northshore storms.
Baton Rouge and nearby areas
Roof, siding, fascia, and gutter repairs where concentrated runoff is damaging one exterior corner.
Continue With the Correct Service Page
Related SHIC Resources
Technical Reference
Building-Science Guidance Used for This Article
Useful Terms
Kick-Out Flashing Glossary
- Kick-out or diverter flashing
- Formed flashing that turns water away from a wall at the lower end of a roof-to-wall intersection.
- Step flashing
- Overlapping pieces installed with the roof covering along a sloped roof-wall joint.
- WRB
- Water-resistive barrier behind the wall cladding that forms part of the drainage plane.
- Drainage plane
- A continuous layer or system designed to direct water downward and outward behind the exterior finish.
- Roof-edge metal
- Drip edge, gutter apron, or another specified perimeter component that helps control water at the roof edge.
- Shingle fashion
- An overlap sequence in which upper materials drain over lower materials instead of directing water behind them.
Frequently Asked Questions
Kick-Out Flashing FAQ
Does every roof need kick-out flashing?
Not every roof has the same geometry. Kick-out flashing is used where a sloped roof-to-wall flashing run terminates and runoff must be directed away from the wall, commonly near an eave and gutter. Current code requirements, approved details, and manufacturer instructions govern the specific project.
Can kick-out flashing be installed without replacing the roof?
Often, yes. A stand-alone retrofit may be practical when the surrounding roof and wall remain serviceable. Selected shingles, siding, trim, soffit, or gutter components may still need removal so the new flashing can be integrated instead of surface-mounted.
Can the repair be completed without removing siding?
Sometimes limited access already exists, but many repairs require selective cladding removal to inspect and reconnect the WRB behind the wall finish. The amount depends on siding type, trim, flashing condition, and concealed damage.
Will a larger gutter stop a roof-to-wall leak?
Not if water is bypassing the gutter because the diverter or wall flashing is missing or incorrect. A larger gutter can help with capacity after water reaches the trough, but it does not replace the kick-out detail.
Can caulk fix missing kick-out flashing?
No. Caulk may be part of a specified flashing assembly, but it cannot create the shaped metal, correct overlap, WRB connection, or discharge path needed at the corner.
Should I use a garden hose to find the leak?
Do not climb onto a wet roof or perform an uncontrolled DIY hose test. Water testing can force moisture into the assembly and produce misleading results. A qualified professional can decide whether controlled testing is safe and useful after visual and moisture clues are reviewed.
How can I tell whether kick-out flashing is missing?
Photos from the ground may show that no diverter turns away from the wall at the bottom of the step-flashing run. However, a visible piece does not prove that it is connected correctly behind the siding. Selective removal may be needed to verify the hidden layers.
What happens if damaged sheathing is found?
The contractor should document the condition, explain the repair options, and obtain approval for additional work before the area is closed. The final scope depends on the extent of damage and whether framing, insulation, interior finishes, or environmental concerns are involved.
Is kick-out flashing a roofing, siding, or gutter repair?
It can involve all three. The component sits at a transition shared by the roof, wall, and drainage system. The responsible scope should assign every affected layer and avoid leaving the most important connection between separate trades.
Stop the Leak at the Source
Request a Roof-to-Wall Leak Evaluation
If water is staining the siding, soffit, fascia, or an interior corner below a roof-wall transition, SHIC can evaluate the flashing, wall drainage layers, and gutter entry and provide a clear written repair scope.
Request a Free Estimate