Tile roofing
Architectural shingles
Metal roofing
GAF
Owens Corning
Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
IKO Flashing Replacement: The Riverside Owner’s Guide
IKO flashing replacement in Riverside typically runs $350 to $900 installed, depending on the flashing type, roof pitch, and how much surrounding material needs to be pulled back to do the job right. We stock IKO-compatible flashing on our trucks and can usually complete most single-flashing replacements the same day we diagnose the problem. You’ll typically discover failed flashing after a rainstorm: a water stain on the ceiling, paint bubbling near a wall-roof intersection, or granules collecting in a gutter below a chimney or skylight. Flashing is the metal or synthetic barrier that seals the joints where your roof meets a wall, chimney, pipe, or valley, and when it fails, water gets exactly where it shouldn’t.
Before you read further: if you spot water coming through, don’t wait. What starts as a $400 flashing repair becomes a $4,000 decking and insulation replacement inside a single Riverside winter. Call us at (562) 315-0297 and we’ll get eyes on it.
Which IKO Models This Applies To
IKO flashing components are designed to integrate with IKO’s full residential roofing line, and that matters more than most homeowners realize. The flashing itself doesn’t come in “model numbers” the way shingles do. Instead, IKO manufactures flashing profiles that pair with their Marathon, Cambridge, Dynasty, and Nordic series shingle lines, along with their roll roofing and underlayment systems. The compatibility question is about the roof assembly as a whole: the flashing needs to sit correctly against the shingle profile and underlayment layer, or you’ll get water wicking underneath the metal.
Here’s the gotcha most Riverside homeowners don’t know: IKO’s architectural shingle lines are thicker than their 3-tab lines, which means step flashing has to be sized for the shingle height. A flashing piece cut for 3-tab shingles won’t overlap correctly on Dynasty architectural shingles, leaving horizontal seams exposed to wind-driven rain. When we do an IKO flashing replacement on a Riverside home, we match the flashing to the specific shingle series on the roof, not just “whatever’s on the truck.” That’s the difference between a repair that lasts five years and one that lasts twenty.
You also have a real choice here: IKO-branded flashing components or quality aftermarket equivalents from manufacturers like GAF, Owens Corning, and CertainTeed. For most residential applications, the aftermarket galvanized steel or aluminum flashing performs identically to IKO-branded at a lower cost. We’ll show you both options with pricing before any work starts.
Styles & brands we work with






Signs Your IKO Flashing Replacement Is Failing
- Water staining on ceilings or walls near roof intersections. This is the classic flashing failure signature. The stain usually appears directly below where a wall meets the roof, or beneath a chimney or skylight. By the time you see it inside, the flashing has been failing for weeks or months.
- Lifted, bent, or missing flashing pieces visible from the ground. Riverside’s Santa Ana winds are rough on exposed flashing. Look at your roof-wall intersections from the street. If you see metal that’s no longer flat against the wall or shingles, or a gap where metal should be, water is getting in.
- Rust or corrosion on visible metal flashing. If you can see rust streaks or pitting on chimney flashing or step flashing from the ground, the metal is structurally compromised. Riverside’s dry heat slows rust compared to coastal cities, but once it starts, it doesn’t stop.
- Granules in gutters directly below roof-valley intersections. Failed valley flashing lets water run underneath shingles at the roof’s seams, which breaks down the shingle undersides and washes granules into the gutter. If you see a heavier granule accumulation in one section of gutter, check the valley above it.
- Caulk or tar patches on flashing that are cracked or pulling away. A previous owner or contractor tried to “fix” the flashing with sealant instead of replacing it. That’s a temporary band-aid. Riverside’s UV exposure bakes caulk and tar brittle within two to three years. If you see cracking sealant around a pipe boot or chimney flashing, the underlying flashing has likely already failed.
See the difference
Before
After
Before
After
Before
AfterReplacement Cost & What’s Included
Here’s real Riverside pricing for IKO flashing replacement, based on what we see day in and day out:
- Pipe boot flashing (vent pipes): $275 to $450 installed. Single-pipe replacement, includes removing surrounding shingles, installing new IKO-compatible boot, re-sealing, and re-securing.
- Step flashing along a wall-roof intersection: $350 to $700 installed, depending on wall length. Includes removing a section of siding or stucco at the base to seat the flashing correctly behind the wall’s weather barrier.
- Chimney flashing (front, side, or full cricket replacement): $500 to $1,200 installed. Chimney work is more involved because you’re cutting into masonry or stucco, and counter-flashing has to be embedded properly.
- Valley flashing replacement: $450 to $900 installed, depending on valley length and whether we need to replace any shingle courses adjacent to the valley.
- Skylight flashing replacement: $400 to $850 installed, depending on skylight brand and flashing kit requirements. Some skylight manufacturers require their own flashing kit to maintain warranty.
Every Tilehurst Roofing Riverside flashing replacement includes a written price before any work starts. That means the number on your estimate is the number you pay, no surprise additions at the door. We also put a written guarantee on every repair before the crew leaves, not mailed later. If the repair fails inside the guarantee period, we return to correct it at no charge under our 365-Day Done Right Promise. That’s a full year of documented accountability on every flashing replacement we do in Riverside.
DIY or Call Us?
Let’s be straight about this: replacing flashing is not a weekend DIY project, and there’s a safety reason beyond the leak risk. Getting to flashing means working at roof height, often on the edge of the roof or against a wall, which is exactly where falls happen. We’ve seen too many homeowners with a “simple flashing fix” end up in urgent care. If you’re not comfortable on a ladder with tools in both hands, that’s not a character flaw; it’s a reason to call a pro.
What you can safely do is identify the problem. From the ground or a safe ladder position, look for lifted metal, visible gaps, rust streaks, or cracked sealant around chimneys, pipes, walls, and valleys. Take photos. Note where interior stains are appearing. That information helps us give you a faster, more accurate estimate over the phone. What you shouldn’t do is climb onto the roof, peel back shingles, or attempt a caulk-and-hope repair. Caulk fails in Riverside’s UV within two years, and a botched DIY attempt usually costs more to undo than the original repair would have cost. If you see failing flashing, call us at (562) 315-0297. We’ll tell you the price before we touch your roof. That’s just how it should work.
FAQs
Properly installed IKO-compatible flashing lasts 20 to 30 years in Riverside’s climate, often outlasting the shingles themselves. The weak points are UV exposure on sealants and wind damage from Santa Ana events. Pipe boot flashing tends to fail first, typically in 10 to 15 years, because the rubber gasket degrades faster than the metal. If your flashing was installed incorrectly or with improper sealing, expect failure within 5 to 7 years. Call (562) 315-0297 for an inspection if you’re not sure which situation you have.
In most cases, no. Once flashing is rusted through, lifted, or improperly seated, patching it with sealant or tar is a short-term stopgap that fails within two to three years in Riverside’s sun. The correct repair is replacing the affected flashing section and properly re-seating it behind the wall’s weather barrier. If it’s a newer flashing piece that’s simply come loose, we can sometimes re-secure and re-seal it. We’ll give you an honest assessment and a written price before any work starts.
Most flashing replacements take between two and four hours, including removing surrounding shingles or siding, installing the new flashing, re-sealing, and clean-up. Chimney flashing or valley replacements on steep Riverside roofs can take longer, typically a half-day to a full day. We’ll give you a clear time window before the crew arrives, and we show up in the window we gave.
We stock IKO-compatible flashing components on our trucks: pipe boots, step flashing, valley flashing, and chimney flashing in standard sizes. We also stock equivalent flashing from GAF, Owens Corning, and CertainTeed, which gives you options on price and material. If your roof requires a specialty flashing piece or a specific skylight manufacturer’s kit, we can typically have it in hand within one to two business days. Call (562) 315-0297 and we’ll tell you exactly what’s needed for your roof.
Written by Greg Holloway, Owner, Tilehurst Roofing Riverside at Tilehurst Roofing Riverside, serving Riverside and nearby areas.