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IKO Home Additions & ADU: The Fort Worth Owner’s Guide
If you have an IKO-backed addition or ADU project that’s gone sideways, here’s the straight answer: a full home addition in Fort Worth runs $45,000 to $130,000, and an ADU typically lands between $90,000 and $220,000 depending on square footage, foundation work, and whether you’re tying into existing plumbing or running new lines. We stock and install IKO-compatible roofing and building materials on additions and ADUs across Fort Worth, and we keep the common IKO shingle lines and underlayment on the truck so the job doesn’t stall waiting on parts. Most owners discover their IKO product has failed when a roof leak shows up at the wall-to-roof junction on a new addition, or when the underlayment under an ADU roof starts telegraphing through after a North Texas hail season.
Bradford Remodeling Co Fort Worth is an independent service provider. We’re not affiliated with IKO, but we work with their product lines daily and know where they hold up and where they fail in Tarrant County weather.
Key Takeaways
- IKO hardware and shingle systems on additions and ADUs typically need inspection or replacement at the 8 to 12 year mark in Texas sun exposure. Your warranty may cover less than you think.
- The installed cost to replace failed IKO components during an addition or ADU build runs from $45,000 up to $220,000. Roofing components alone on a new addition add $8,000 to $20,000.
- We carry common IKO Cambridge and Dynasty shingle lines plus IKO underlayment and flashing accessories on our trucks in Fort Worth.
- Every job gets a written price before work starts. The 365-Day Done Right Promise covers the full installation for one year, in writing.
Which IKO Models This Applies To
IKO makes two shingle lines that dominate Fort Worth additions and ADUs: the Cambridge series (their architectural laminated shingle) and the Dynasty series (their heavier-weight laminated shingle with a wider nail zone). Both show up constantly on residential additions because they’re priced aggressively and spec’d by production builders. If you’re adding onto a home built after 2010 in Fort Worth, there’s a good chance the existing roof is IKO Cambridge in a color like Dual Black, Weatherwood, or Harvard Slate. Matching that on a new addition matters, and it’s one of the first compatibility questions we resolve on site.
For ADU roofs, the pitch is usually shallower than a main house, which changes the underlayment spec. IKO’s StormShield and GoldShield self-adhered underlayment lines are rated for low-slope applications down to 1:12, but only if installed per the manufacturer’s nailing pattern and lap sequence. We see ADU roofs in Fort Worth where the original builder skipped the peel-and-stick underlayment entirely and used 15-pound felt on a 2:12 pitch. That’s a failure waiting for the first driving rain.
When it comes to OEM versus aftermarket, the honest split is this: IKO shingles and underlayment should always be IKO if you’re matching an existing roof or filing a warranty claim. For flashing, pipe collars, ridge vents, and drip edge, quality aftermarket equivalents from brands like Gibraltar or Owens Corning perform the same or better at a lower installed cost. We don’t substitute materials without telling you in writing first.
To identify what’s on your roof right now, look for the bundle wrapper in the attic or the builder’s leftover material stack in the garage. The IKO series name and color code are printed on the wrapper. If you don’t have that, we can match from a small roof cut sample.
Styles & brands we work with
Signs Your IKO Home Additions & ADU Is Failing
- Granule loss in gutters and downspout splash blocks. IKO Cambridge shingles shed granules faster than premium lines in intense Texas UV. If you’re seeing gray-black grit piling up at the downspout elbow, the shingle’s asphalt layer is oxidizing and losing its weather barrier. This is the first stage of failure and shows up fastest on west-facing roof planes.
- Curling or lifting shingle tabs at the eaves. This happens when the nail placement was too high or too few nails were used during the original install. On Fort Worth additions, we regularly see nail pops at wind-exposed corners where 4-nail patterns were used instead of 6-nail. The tab lifts, wind gets under, and the shingle tears at the nail line.
- Dark stains streaking down the roof deck from the wall junction. On additions, the roof-to-wall step flashing is often underlapped or missing entirely. Water runs down the sidewall, wicks behind the flashing, and rots the OSB sheathing below. By the time you see the stain on the exterior wall, the sheathing behind the shingles is usually soft.
- Bubbling or blistering under the shingle surface. This is moisture trapped in the shingle mat, typically from a poorly vented attic in a new addition. Fort Worth heat cooks the moisture into steam, the shingle blisters, and the granule layer pops off in the next hail storm.
- Flashing separation at the ADU roof-to-wall intersection. ADUs are often built tight to the main structure with a ledger attached at the wall plane. When that junction isn’t counter-flashed correctly, thermal movement pops the sealant within two or three Fort Worth summers, and water migrates into the wall cavity. We fix this exact failure on ADUs in the south-side neighborhoods more than any other single issue.
See the difference
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After
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AfterReplacement Cost & What’s Included
Here are the real Fort Worth numbers. A full home addition built from foundation to roof runs $45,000 to $130,000 and includes the IKO roofing system as part of the exterior shell. An ADU construction lands at $90,000 to $220,000, with the roof system representing roughly $8,000 to $20,000 of that total depending on square footage, pitch, and whether you need peel-and-stick underlayment for a low-slope design.
If you’re replacing failed IKO components on an existing addition without rebuilding the structure, a roof replacement on a single-story addition runs $8,000 to $20,000 for tear-off, new underlayment, IKO shingles, flashing, and ridge vent. The range is driven by two things: roof complexity (valleys, wall intersections, skylights, and pitch) and the condition of the underlying decking once we strip the old shingles. Rotten sheathing adds $2 to $3 per square foot for replacement, and we show you the bare deck before we quote that line item.
Every quote includes tear-off and disposal, all flashing, underlayment, IKO shingles, ridge vent, and a written scope of work. The 365-Day Done Right Promise covers the installation for one full year. If our work fails inside that window, we come back and correct it at no charge. That’s in writing, every time.
DIY or Call Us?
Some things you can safely check yourself without getting on a ladder. Look at the gutters for granule buildup. Check the roof from the ground with binoculars for curling tabs or missing shingles. If the attic is accessible, check the sheathing under the roof line for water staining after a rain. Those observations help you decide if you even need to call someone.
What you should not do is get on a roof that’s failed. A shingle roof on a Fort Worth addition in July is holding 150-plus degrees on the surface, and walking it without a harness and proper shoes is how homeowners slide off into the flower bed. Steep pitches on two-story additions are worse. The flashings, nail patterns, and underlayment specs on IKO products are also specific enough that a misapplied repair voids the remaining manufacturer warranty and creates a bigger leak than you started with.
If you’re not sure what you’re looking at, call us at (682) 204-4897. We’ll send a background-checked, uniformed technician to inspect the roof, show you photographs of exactly what’s failing, and give you a written price before any work starts. No numbers that move at the door.
FAQs
An IKO Cambridge roof in Fort Worth realistically lasts 10 to 15 years before granule loss and UV degradation become significant, and an IKO Dynasty roof can reach 15 to 20 years if the attic ventilation is correct and the nailing was done to spec. Texas hail and intense sun cut lifespan compared to northern climates. If your roof is at the 12-year mark, call (682) 204-4897 and we’ll inspect it for you.
Yes, if the damage is localized to one or two shingles, a flashing joint, or a single pipe collar, a repair is realistic and typically runs $400 to $1,800 in Fort Worth. If the granule loss is roof-wide or the sheathing is rotted, a patch just buys you a season. We’ll tell you which situation you have, with photographs, before we quote a dollar amount.
Most single-story addition roof replacements in Fort Worth are completed in one to two days, weather permitting. ADU roofs with low-slope underlayment details or multiple wall intersections may run three days. We schedule the tear-off, replacement, and cleanup as one continuous job so you’re not living with an exposed deck overnight.
We keep common IKO Cambridge colors and IKO StormShield underlayment on our trucks based on the Fort Worth housing stock we see most. If your addition needs a less common IKO Dynasty color or a special-order accessory, we can usually have it in hand within two to three business days from our suppliers. We’ll confirm availability before we schedule the job so there’s no surprise delay.
Straight scope, firm price, no surprises at final walkthrough. If your IKO roof on a Fort Worth addition or ADU is failing, call (682) 204-4897 and schedule a free estimate. Curtis Lane and the Bradford Remodeling crew read the job site before we read the quote, and you’ll get a written price before any tool comes out of the truck.
Written by Curtis Lane, Owner, Bradford Remodeling Co Fort Worth at Bradford Remodeling Co Fort Worth, serving Fort Worth and nearby areas.
