Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
IKO Home Additions & ADU: The Jacksonville Owner’s Guide
If you’re planning a home addition or ADU in Jacksonville and want IKO roofing and waterproofing products integrated into the build, we install and source IKO-compatible materials on projects ranging from $45,000 to $130,000 for additions and $90,000 to $220,000 for a full ADU. Most homeowners discover they need IKO-specific help midway through planning: the architect spec’d IKO shingles or underlayment, the existing roof line has IKO products already, or a permit in Duval County requires matching materials across the new roofline. We stock common IKO accessories on the truck and can order the rest within days, not weeks.
Call (904) 643-6243 and we’ll walk the site, confirm which IKO line fits your existing roof, and hand you a written price before anything gets ordered.
Which IKO Models This Applies To
IKO makes several distinct shingle and underlayment lines, and the compatibility question matters more in Jacksonville than most homeowners expect. The two most common lines we see on Jacksonville additions are the IKO Cambridge architectural shingle (the workhorse, roughly 30-year rated, available in a wide color range) and the IKO Dynasty line, which carries a heavier profile and a stronger wind warranty. If your existing roof is IKO Cambridge, you want the addition to match that exact line. Not just “a gray architectural shingle” but the actual IKO product with the same granule blend, or the roofline will read as two different roofs from the street.
Here’s the gotcha we run into in Duval County: IKO’s Armourshake and Nordic lines look similar from the ground but use different dimensions and exposure settings. You cannot mix them on the same roof plane and expect the warranty to hold, and you cannot always tell what you have from a phone photo. We check the back of a shingle for the IKO plant code and production date, which tells us exactly what was installed and whether the color is still in production. Elmstead Remodeling Jacksonville is an independent contractor, not affiliated with IKO, so we have no incentive to push one line over another. We match what is already there.
Styles & brands we work with
Signs Your IKO Home Additions & ADU Is Failing
Most IKO-related failures on Jacksonville additions are not dramatic. They show up as small, persistent problems that get worse through the wet season. Here is what we see, in order of frequency:
- Granule loss in gutters and downspouts. If you see dark granules collecting at the base of a downspout, the shingle surface is eroding. On a Jacksonville addition this shows up fastest on the south-facing slope, where summer sun plus reflected heat from a neighboring wall ages the asphalt faster than the rest of the roof.
- Curling at the edges of the addition’s roofline. This typically means the underlayment is holding moisture and the shingle tabs are lifting. We see it most often on additions where the roofline was tied into the original house without proper step flashing.
- Visible gaps at the transition between old roof and addition roof. This is the weak point on nearly every home addition. If the original builder caulked the transition instead of flashing it, the gap will open within three to five Jacksonville summers.
- Staining on the ceiling of the new space after heavy rain. By the time the stain shows, water has already traveled through the IKO underlayment and decking. The fix usually involves opening the ceiling, replacing a section of decking, and resealing from above, not just patching the shingle.
- Algae streaking that returns within months of cleaning. Jacksonville’s humidity feeds algae growth on all asphalt shingle brands, including IKO. IKO’s algae-resistant lines slow it, but the first sign of streaking on an addition with basic Cambridge shingles means the copper granule protection has worn thin.
See the difference
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AfterReplacement Cost & What’s Included
For a full IKO roof replacement on a Jacksonville home addition, expect $8,000 to $20,000 depending on square footage, pitch, and whether the decking underneath is still sound. If the issue is isolated to the transition point between old roof and new, a repair typically runs $400 to $1,800. Here is how that breaks down:
- Repair at transition flashing: $400 – $1,800
- Partial re-shingle of addition roof: $3,000 – $8,000
- Full addition roof replacement (IKO Cambridge): $8,000 – $20,000
- Full addition roof replacement (IKO Dynasty): $12,000 – $22,000
Every quote includes the named IKO product, new underlayment, step flashing, and the written price before the first nail goes in. Our 365-Day Done Right Promise covers the finished roof: if anything is not done right after the job is complete, we come back and make it right. No change orders, no allowances that quietly grow.
DIY or Call Us?
Roof work on a Jacksonville addition is not a weekend project. The pitch, the height, the Florida heat, and the transition flashing all combine into a situation where a small mistake turns into a ceiling leak inside the new space you just paid for. We are direct about this because we have pulled apart DIY repairs on Avondale bungalows and similar homes across Jacksonville where the homeowner spent more fixing the second mistake than the first repair would have cost.
What you can safely do: check your gutters after a hard rain and note whether granules are collecting. Photograph any curling or gaps from the ground. That documentation helps us quote accurately over the phone. What you should not do: climb onto a roof in July with a bundle of shingles and a YouTube tutorial. High heat, steep pitches, and the risk of stepping through decking make it dangerous.
Call (904) 643-6243 and we’ll send a background-checked crew with the right IKO materials and the right fall protection. The written price covers everything, including the photo of the clean-up before we leave.
FAQs
IKO Cambridge shingles typically last 22 to 28 years in Jacksonville’s coastal climate, while Dynasty can reach 30 to 35 years when the decking and ventilation are sound. The relentless summer sun and wet-season humidity in Northeast Florida shorten the lifespan compared to drier markets. Call (904) 643-6243 and we’ll inspect your addition roof and give you an honest remaining-life estimate, no cost.
Yes, individual IKO shingles can be replaced when the damage is isolated, usually $400 to $1,800 for a typical repair on a Jacksonville addition. If the granule loss is widespread across the slope or the underlayment has failed, replacement is the honest fix. We’ll show you photos of what we find so the recommendation is not a mystery.
Most addition roof replacements in Jacksonville take two to four working days once the materials are on site. IKO products we do not stock on the truck usually arrive within a week. We name the day the dumpster arrives and the day the materials land, so you are never guessing.
We keep common IKO Cambridge colors, underlayment, and flashing components on our trucks for Jacksonville jobs, and we can source Dynasty, Nordic, and Armourshake lines through local suppliers within days. We also stock materials from KraftMaid, Cambria, and Silestone for the interior side of an addition, so the whole project moves from one written scope rather than three separate contractors.
If you are planning a home addition or ADU in Jacksonville and need IKO-matched roofing done right, call (904) 643-6243 for a free estimate. Graham Stein writes every scope of work in plain language: materials by name, labor by stage, price before work starts. Name the material, name the day, name the price, then there is nothing left to wonder about.
Written by Graham Stein, Owner, Elmstead Remodeling Jacksonville at Elmstead Remodeling Jacksonville, serving Jacksonville and nearby areas.
