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IKO Flashing Replacement: The Jacksonville Owner’s Guide
IKO flashing replacement in Jacksonville typically runs between $350 and $900 installed, depending on how much flashing needs to come out and whether the decking underneath has taken water. We stock IKO-compatible step flashing, pipe boot flashing, and valley flashing on our trucks, so most replacements happen the same day we diagnose the problem. Most homeowners discover failed flashing the hard way: a brown stain spreads across the ceiling after a hard Florida downpour, and the roofer finds the flashing has corroded through or pulled away from the wall years ago.
Which IKO Models This Applies To
IKO flashing is not a single part. It’s a family of metal pieces that work with IKO’s shingle lines, including Cambridge, Dynasty, Nordic, and Royal Estate. The flashing itself gets matched to the roof’s geometry first and the shingle profile second. What matters most is the gauge of the metal and the configuration: step flashing for sidewalls, L-flashing for chimneys and skylights, and W-valley flashing for open valleys. IKO’s flashing specs call for 26-gauge minimum galvanized steel or .019-inch aluminum in coastal applications, which matters in Jacksonville’s salt air. If your roof has IKO’s architectural shingles, the step flashing should step at 5-inch increments to match the shingle exposure. One gotcha we see often: homeowners buy generic step flashing at a big-box store that’s too short or too thin, and it fails again within three years. We match the flashing to the existing IKO profile and the wall intersection, not just whatever is on the shelf.
Birchbark Roofing Jacksonville is an independent roofing contractor. We’re not affiliated with IKO, but we install IKO flashing replacements every week and stock the profiles Jacksonville homes actually need.
Styles & brands we work with






Signs Your IKO Flashing Replacement Is Failing
- Water stains on interior ceilings or walls near chimneys, skylights, or dormers. This is the classic flashing failure signature. The leak usually starts at the seam where the flashing meets the vertical wall or chimney, and water travels along the underside of the decking before it shows up inside.
- Visible rust or corrosion on exposed flashing. Jacksonville’s humidity and salt air eat galvanized flashing faster than inland Florida. If you can see rust through the paint or the metal is flaking, the flashing is already compromised and water is working its way behind it.
- Lifted or curling shingles at wall intersections. When step flashing was never installed or has pulled loose, the shingles along the wall line start to lift. Wind-driven rain gets under them and follows the wall down into the house.
- Granules collecting in gutters near a chimney or wall line. Granule loss is normal over time, but concentrated granule piles below a flashing point suggest water is washing the shingle surface there, which means the flashing isn’t doing its job of moving water past the shingle.
- Daylight visible through the roof boards in the attic. If you can see light where the roof meets a wall or chimney, the flashing has separated or never existed in the first place. Any place light gets through, water gets through.
Replacement Cost & What’s Included
In Jacksonville, IKO flashing replacement costs sit in a predictable range. A single pipe boot or small section of step flashing runs $350 to $500. Replacing step flashing along an entire wall line, or rebuilding a chimney flashing assembly, lands closer to $650 to $900. The variables are how much old flashing has to be removed, whether the adjacent shingles can be reused or need replacement, and whether the decking underneath has rotted from the water that got in. If rot is present, we’re into roof repair territory, and you’ll see that number on paper before we cut anything.
Every flashing replacement we do in Jacksonville includes the new metal, the labor to remove and reinstall the affected shingles, sealant rated for Florida’s UV exposure, and haul-away of the old material. You get a written price in dollars before any work starts, and the job falls under our 365-Day Done Right Promise. If it’s not right, we make it right.
See the difference
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AfterDIY or Call Us?
Flashing replacement is not a high-tension danger like a garage spring, but it is the most common DIY roof repair that fails. The metal itself is easy to buy. What’s not easy is getting the flashing interleaved correctly with the existing shingles, sealing the vertical seam without trapping water behind it, and matching the metal to IKO’s profile so the next storm doesn’t find the gap. We regularly repair flashing that a previous owner installed with roofing cement and hope. Roofing cement cracks under Florida sun within two seasons.
What you can safely do is identify the problem and get ahead of the damage. Check your attic for daylight at wall lines after a heavy rain. Look at exposed flashing from the ground with binoculars. If you see rust, lifted shingles at the wall, or interior staining, call us at (904) 604-7914. Erik Lindgren will walk the roof with you, show you exactly what failed, and hand you a written price before we touch a shingle.
FAQs
Galvanized IKO flashing in Jacksonville’s coastal climate typically lasts 15 to 20 years before corrosion or sealant failure becomes a problem. Aluminum flashing lasts longer, often 25 to 30 years, but costs more upfront. If your home is within a few miles of the Intracoastal or the beach, expect the shorter end of that range. Call (904) 604-7914 and we’ll inspect yours before it fails.
Small sealant failures at flashing seams can sometimes be resealed, but once the metal itself is rusted through, lifted, or separated from the wall, repair is a temporary fix that usually fails within a year. In Jacksonville’s rain, we recommend replacement for any flashing showing visible corrosion or separation. The price difference between a patch and a proper replacement is usually less than the cost of repairing the ceiling damage a failed patch causes.
Most IKO flashing replacements in Jacksonville take 3 to 6 hours, depending on how much flashing is involved and whether the adjacent shingles can be reused. A single pipe boot is under two hours. A full chimney flashing rebuild can take a full day. You’ll get a time estimate along with your written price before we start.
Yes. Our trucks carry 26-gauge galvanized step flashing, aluminum step flashing for coastal properties, pipe boot flashing in multiple sizes, and valley flashing that matches IKO’s profile. We also work with GAF, Owens Corning, and CertainTeed materials, so if your roof has mixed brands, we can match what’s there.
Call Birchbark Roofing Jacksonville for IKO Flashing Replacement
If you have water coming in around a wall, chimney, or skylight, the flashing is usually the first suspect and the cheapest fix compared to letting it go. Call (904) 604-7914 to schedule a free inspection. We’ll show up on time, walk the roof with you, and put the price in writing before anything gets removed. Shoe covers at the door, drop cloths through the hallway, and a photo of the clean-up before we leave. That’s how we work in Jacksonville.
Written by Erik Lindgren, Owner, Birchbark Roofing Jacksonville at Birchbark Roofing Jacksonville, serving Jacksonville and nearby areas.