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IKO Home Additions & ADU: The West Palm Beach Owner’s Guide
A failed IKO roof system over a home addition or ADU in West Palm Beach typically costs $45,000 to $130,000 to re-roof and repair properly when water damage has reached the framing, though isolated roof repair on an addition starts as low as $400 to $1,800. We stock IKO-compatible underlayment, flashing, and shingle lines matched to IKO’s Cambridge, Dynasty, and Nordic series, and our crews in West Palm Beach can usually start a repair within days of your written estimate.
Most owners discover the problem the Florida way: a brown stain spreads across the ceiling of the addition, or the ADU smells musty after a hard rain. By the time you see the stain, water has usually been working through the IKO underlayment for weeks. The roof deck underneath is what we end up replacing.
What surprises people here more than anything is how fast a small flashing failure turns into a big job. West Palm Beach gets roughly 62 inches of rain a year, and the sun eats IKO shingle granules faster than it does up north. A roof that would last 25 years in Ohio needs attention at 15 to 18 years here. We write it all in the estimate, which is why we hand you the written price before any work starts.
Which IKO Models This Applies To
IKO makes three architectural shingle lines you’ll commonly see on West Palm Beach additions and ADUs: Cambridge, Dynasty, and Nordic. Cambridge is the most common, with its standard 13 1/4-inch width and 5 5/8-inch exposure. Dynasty runs heavier, with a 3 1/8-inch exposure and an oversized look. Nordic is the performance laminate with a Class 4 impact rating, which is worth remembering here because West Palm Beach sees enough wind-driven debris in summer storms that insurance companies notice.
The compatibility gotcha most owners miss: IKO underlayment and flashing systems are not universal across these lines. Cambridge uses standard 30-pound felt-compatible underlayment, but Nordic performs best with IKO’s high-temp ice-and-water shield, specifically because Nordic’s darker granule colors hold more heat on a flat-roof ADU addition. If you have a flat or low-slope section on your ADU, that’s a different membrane system entirely, and that matters more in West Palm Beach than most places because our afternoon thunderstorms pool water on anything under a 3:12 pitch.
On OEM versus aftermarket: for shingles, we recommend IKO OEM when matching an existing roof on an addition, because even a “close” aftermarket color drifts noticeably after two Florida summers. For underlayment and flashing, we often use quality equivalents like GAF WeatherWatch or Owens Corning Deck Defense, because they carry equivalent or better warranty terms and we can get them faster in this market. Graham Stein reviews every written scope before it lands in your hands, so you’ll see exactly which parts are IKO and which are equivalent, and why.
Styles & brands we work with
Signs Your IKO Home Additions & ADU Is Failing
- Granule grit in the gutters. IKO shingles shed granules as the asphalt binder breaks down under UV, and in West Palm Beach that starts sooner than the manufacturer’s warranty suggests. If your addition’s gutters collect a black, sandy grit after every storm, the shingles are aging fast and water is next.
- Curling or lifting shingle edges on the addition’s sun-exposed slope. The west-facing side of any West Palm Beach ADU bakes harder than the rest of the roof. IKO shingles that curl along that edge have lost enough asphalt flexibility that wind will start peeling them in the next season.
- Staining on the underside of the overhang or soffit. This means water is getting past the drip edge, which on a home addition is often where the original contractor cut corners. The stain usually appears months before the leak reaches your ceiling.
- Musty smell inside the ADU with no visible plumbing leak. Roof leaks on low-slope IKO sections often move sideways before they show themselves. By the time you smell it, the insulation above the drywall is saturated and the decking is likely soft.
- Loose or missing flashing at the addition’s tie-in point. The seam where a home addition meets the original roofline is the single most common failure point we see in West Palm Beach. If the IKO step flashing there is lifted, rusted, or seamed with caulk, water has a direct path inside.
See the difference
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AfterReplacement Cost & What’s Included
Home additions and ADUs in West Palm Beach run a wide range, because the scope depends on how far the water got. A full reroof over an addition with IKO Cambridge shingles, new underlayment, new drip edge, and new flashing typically runs $8,000 to $20,000. When the framing under the roof is rotten, which happens more often here than owners expect, that number climbs toward the $45,000 to $130,000 range for a full rebuild of the addition’s roof structure and interior finishes.
Here’s what the written price covers on every Elmstead job: the IKO or equivalent shingles and underlayment by brand and quantity, the flashing and fasteners, disposal of the old roof, protection of your interior with drop cloths and shoe covers, and a photo of the clean-up before our crew leaves. Nothing gets added after we start. If the price changes because we find rot behind the decking, you’ll approve the change in writing before we touch it.
The Cedarwell Care Promise applies to every project we take on. If it’s not done right, the 365-Day Done Right Promise means we make it right. No chasing, no arguing, no “that was the subcontractor.”
DIY or Call Us?
What a homeowner can safely do: check gutters for granule grit, look at the flashing seam where the addition ties into the main house, and snap photos of any curling or missing shingles after a storm. Those photos help us quote accurately before we send a crew. What you should not do: walk a wet or steep roof, pull up shingles to “see what’s under there,” or caulk a flashing seam and hope it holds through hurricane season. A slipped ladder or a rotted deck gives way fast, and the repair bill goes from hundreds to thousands before lunch.
Roof work on a second-story addition in West Palm Beach is dangerous work. We carry the insurance, the harnesses, and the training. Call (728) 203-3270 and we’ll send someone to look, put the written estimate in your hands, and walk you through exactly what we found and what we’d do.
FAQs
IKO shingles on a West Palm Beach addition typically last 15 to 18 years, not the 25 to 30 years the warranty suggests, because Florida’s UV, heat, and storm-driven rain age the asphalt binder much faster than northern climates. If your addition’s roof is past year 15 and you’re seeing granule loss, start budgeting now. Call (728) 203-3270 for an honest inspection and a written estimate.
Yes, if the damage is localized to flashing or a small number of shingles and the decking underneath is still solid, a repair in the $400 to $1,800 range is often enough. If the water has been running long enough to rot the decking or saturate insulation, a repair will fail the same way the original did. Call (728) 203-3270 and we’ll tell you which situation you’re in, in writing.
A typical home addition or ADU roof replacement in West Palm Beach takes two to five working days from tear-off to final clean-up, with larger or two-story additions running toward the top of that range. Weather can stretch that timer, so we schedule starts around the forecast and keep you updated by phone from a live person, not a voicemail box.
We stock IKO underlayment, step flashing, drip edge, and fasteners on our trucks, and we can pull IKO Cambridge, Dynasty, and Nordic shingles from local distributors the same week we write your estimate. That means most West Palm Beach repair work starts within days, not weeks, of your call to (728) 203-3270.
Written by Graham Stein, Owner, Elmstead Remodeling West Palm Beach at Elmstead Remodeling West Palm Beach, serving West Palm Beach and nearby areas.
Call (728) 203-3270 to schedule your free estimate. We’ll put the price in writing before any work starts, and leave the driveway cleaner than we found it.
