Is Kickout Flashing Required by Code in Colorado?

If you are asking is kickout flashing required by code, the practical answer is that many adopted roofing codes and local inspection guides treat kickout flashing as part of the required roof-to-wall water-management detail when a sidewall step flashing ends near an eave, gutter, siding, or wall surface. The safer homeowner question is not just whether a small metal diverter exists. It is whether the roof-to-wall transition actually directs water away from the wall and into the roof or gutter path.

Featured snippet answer: Kickout flashing is required in many code-based roofing scopes where sidewall step flashing terminates at the lower end of a roof-to-wall intersection. Denver’s roofing checklist references IRC R905.2.8.3 and says kick-outs at the end of sidewall step flashing should direct water away from the wall onto the roof or into a gutter. Homeowners should verify the local code, permit scope, and inspection requirement for their property.

At Go In Pro Construction, we see kickout flashing questions come up after leaks, siding stains, gutter overflow, storm damage, and reroof estimates that simply say “flashing” without naming the detail. A code answer helps, but the field answer matters too: water has to leave the wall.

If you are already comparing related exterior scope, keep our guides on apron flashing and kickout details before siding work begins, roof-to-wall flashing after storms, Denver County roofing code scope checks, and gutter water flow checks open while you review your project.

Is kickout flashing required by code?

In many Denver-area reroof conversations, yes, kickout flashing belongs in the code and inspection discussion. The exact requirement depends on the adopted code, local amendments, roof assembly, permit scope, and authority having jurisdiction.

What the code language is trying to prevent

Kickout flashing is the diverter at the lower end of a roof-to-wall intersection. Its job is to push runoff away from the wall before water can track behind siding, trim, housewrap, sheathing, or fascia.

The Building America Solution Center says step and kickout flashing should be installed at roof-wall intersections to protect walls and divert runoff into a gutter.¹ It also warns that undersized or poorly integrated diverters can allow water into wall cavities and create damage behind the exterior finish.²

That is the homeowner-level point: code language is not about a decorative metal part. It is about preventing repeated water delivery into a wall assembly.

How Denver describes kickouts

The City and County of Denver roofing guide is unusually direct. In its sidewall flashing checklist, it references IRC R905.2.8.3 and says kick-outs at the end of sidewall step flashing should be turned out in a way that directs water away from the wall onto the roof or into a gutter.³

The same checklist also describes minimum step flashing and headwall flashing details, which matters because kickout flashing does not work by itself. It has to connect to the step flashing, counterflashing or exterior finish, shingles, underlayment, siding clearance, and gutter path.

This article is homeowner education, not code or legal advice. Denver, Aurora, Lakewood, Arvada, Littleton, Centennial, and other Front Range jurisdictions may handle permit details differently. If your project is permitted, ask the contractor which code section or local checklist item controls the scope.

When “not visible” does not mean “not needed”

Homeowners often ask about kickout flashing only after the exterior wall shows symptoms:

siding stains below a roof edge,
swollen trim near a lower roofline,
peeling paint in the same spot after each storm,
gutter overflow at an inside corner,
wet sheathing found during siding removal,
or a leak that appears during wind-driven rain.

Those clues do not prove the detail is missing, but they justify a closer inspection. The Colorado Roofing Association reminds homeowners that Colorado roofs take a beating from wind, rain, ice, snow, heat, and hail, and it encourages professional roof inspections after severe weather.⁴ We would include roof-to-wall flashing and gutter discharge in that inspection, especially when the symptoms line up below a sidewall transition.

Where should Colorado homeowners check for kickout flashing?

Most homeowners do not need to climb a ladder to learn where the risk areas are. Start by identifying the roof planes that die into a wall, then look at the lower end of those intersections from the ground.

Lower roof edges that meet siding

The most common trouble spot is a sloped roof that runs along a wall and ends above siding, trim, stucco, brick veneer, or a gutter. If runoff hugs the wall at that lower end, water can bypass the gutter and load the cladding.

We pay extra attention when the wall below has:

dark staining,
algae or dirt streaks,
trim swelling,
repeated caulk failure,
soft fascia or rake trim,
water marks at the soffit,
or paint failure that keeps coming back after repainting.

Building America’s retrofit guidance says missing kickout and step flashing can create expensive homeowner damage and that newer siding can hide trouble even while water is entering the wall during storms.⁵ That matches what we see in the field: the exterior can look acceptable until trim comes off or a wall is opened.

Gutter ends, inside corners, and roof-to-wall handoffs

A kickout should not be evaluated apart from the gutter. If the diverter points water toward a gutter that is too short, clogged, misaligned, or overwhelmed, the wall may still get wet.

After hail, heavy rain, or snowmelt, look for splash marks below the gutter end. If debris or roof granules are collecting at the outlet, combine the kickout review with a broader gutters and downspout check. Our article on downspout discharge before final exterior work explains how the final water path can affect siding, paint, walkways, patios, and foundation beds.

Siding and paint projects that expose the wall

If siding, trim, wrap, or paint work is already planned, do not wait until the wall is closed to ask about flashing. This is when a contractor can often see whether the old wall shows water staining, rot, poor housewrap laps, or a missing diverter.

For projects involving siding, paint, or windows, ask who owns the roof-to-wall transition. If the roofer assumes the siding crew will handle it and the siding crew assumes the roofer already handled it, the homeowner can end up with a clean finish over the same bad water path.

How should kickout flashing change your roofing or siding scope?

The goal is not to turn every small flashing question into a major project. The goal is to make the written scope specific enough that the water path is clear.

Ask for the detail by name

A scope that says “replace flashing as needed” may be too vague if the known problem is at a roof-to-wall termination. Ask the contractor to identify:

whether step flashing is present,
whether kickout flashing is present at the lower end,
whether the siding or exterior finish properly counterflashes the metal,
whether the gutter receives the diverted water,
whether damaged sheathing or trim is expected,
and whether the detail is included, excluded, or contingent on opening the wall.

That language is especially important when you are comparing roofing bids. One estimate may include a proper roof-to-wall rebuild while another assumes existing flashing can stay in place. The cheaper line item may not be comparable.

Separate code, workmanship, storm damage, and maintenance

Kickout flashing questions can overlap with insurance or storm work, but they should be documented carefully. A missing or poorly integrated flashing detail may be a code or workmanship issue. Bent metal, displaced shingles, or new leakage after hail and wind may be a storm-damage issue. Long-term staining may point to maintenance or older installation history.

Those categories matter because this article is not insurance advice. If the file involves a claim, compare photos, dates, scope notes, contractor findings, and carrier responses before assuming what belongs in the current project. Our supplemental roofing estimate guide and roofing insurance claim estimating guide can help organize that conversation.

Document before and after conditions

Before work starts, ask for wide photos that show the roof plane, wall, gutter, and downspout together. Then ask for close photos of the step flashing, kickout, wall condition, and final water path.

After completion, the record should make these answers clear:

Question	What the homeowner should see
Where does the roof-to-wall run end?	A clear view of the lower termination
Is kickout flashing present?	A visible diverter or documented concealed detail
Where does water go?	Onto the roof surface or into the gutter, not behind siding
Was damaged wall material found?	Photos and written notes before repairs closed
Who owns the handoff?	Roofing, siding, gutter, and paint responsibilities separated

That documentation also helps if you later review recent projects or compare a second opinion. A contractor should be able to explain what was inspected, what was corrected, and what remains outside the current scope.

Why Go In Pro Construction for kickout flashing code checks?

At Go In Pro Construction, we treat kickout flashing as a small detail with large consequences. We look at the roof-to-wall transition, step flashing, siding clearance, gutter alignment, downspout discharge, storm evidence, and local permit context together before telling a homeowner what the scope should include.

Because our team works across roofing, gutters, siding, paint, windows, and exterior restoration, we can help Denver-area homeowners avoid a common handoff problem: one trade finishes its part while the water-management defect remains.

Need help checking whether kickout flashing belongs in your roofing or siding scope? Contact Go In Pro Construction to review the roof-to-wall detail, gutter path, photos, and local code context before the work is finalized.

Frequently asked questions

Is kickout flashing required by code in Colorado?

Often, yes, when the adopted code or local inspection checklist requires a kickout at the end of sidewall step flashing. The exact answer depends on the jurisdiction, permit scope, roof assembly, and authority having jurisdiction, so ask the contractor to identify the applicable local requirement.

What does kickout flashing do?

Kickout flashing diverts water away from the wall at the lower end of a roof-to-wall intersection. It should send runoff onto the roof or into the gutter instead of allowing water to track behind siding, trim, or wall sheathing.

Can a roof pass inspection without visible kickout flashing?

That depends on the jurisdiction, roof design, and inspection scope. If the roof-to-wall detail exists and the lower end of sidewall flashing terminates near a wall or gutter, homeowners should ask how the scope satisfies local flashing requirements and where the water is directed.

Should kickout flashing be replaced during a reroof?

It should at least be inspected during a reroof. Replacement or correction becomes more important when the existing kickout is missing, undersized, corroded, poorly integrated with siding, or not directing water away from the wall.

Is missing kickout flashing an insurance issue?

Not automatically. Missing kickout flashing may be a code, installation, maintenance, or pre-existing condition issue unless storm damage changed the condition. Homeowners should treat this as a documentation question and avoid assuming coverage without policy-specific review.

What photos should I ask for?

Ask for wide photos of the roof plane, wall, gutter, and downspout, plus close photos of the step flashing, kickout flashing, siding clearance, wall condition, and finished water path. Those photos make it easier to compare the scope later.