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Tamko Home Additions & ADU: The Jacksonville Owner’s Guide
If you’re planning a home addition or ADU in Jacksonville using Tamko roofing and waterproofing materials, the typical installed project runs $45,000 – $130,000 for a home addition and $90,000 – $220,000 for a detached ADU. We carry and install Tamko-compatible roofing, underlayment, and flashing components on every addition and ADU we build in Jacksonville, and we can typically have a written, line-item price in your hands within days of the walk-through, not weeks.
Most Jacksonville homeowners call us because they’ve spotted a problem at the seam: water staining on a ceiling where the new roofline ties into the old one, shingles lifting at a valley, or a flashing detail that was never done right in the first place. On a home addition or ADU, the Tamko roofing system is only as good as the transitions, and the transitions are where we see the failures.
Which Tamko Models This Applies To
We work with Tamko’s Heritage and Titan XT architectural shingle lines for most Jacksonville additions and ADUs. The compatibility question that matters most in our climate is underlayment: Tamko’s Moisture Guard and Dura Grip products are what we spec under every new roof plane on an addition, because Jacksonville’s summer humidity and afternoon thunderstorms punish any shortcut at the deck level.
If you have an existing Tamko roof on your main house and you’re adding on, you’ll need to decide between matching the existing shingle line or re-roofing the entire structure for a seamless look. Tamko color lots shift slightly year to year, so if your main roof is more than five years old, we’ll pull a sample and compare it against current stock before we order. That’s the kind of detail that prevents a $130,000 addition from having a visibly mismatched roof line.
We also stock Tamko-compatible flashing, ridge cap, and valley components on the truck for repair work. Graham Stein insists on it, because a 20-minute flashing repair shouldn’t require a trip across town to the supply yard.
Styles & brands we work with
Signs Your Tamko Home Additions & ADU Is Failing
- Water staining on the ceiling at the transition point. The new roof ties into the existing structure at one or more valleys and wall intersections. If the flashing wasn’t layered correctly, water works its way under the shingles and shows up inside months after the build.
- Shingles lifting at the roofline seam. Jacksonville wind gusts and thermal expansion pull shingles loose where two roof planes meet. A lifted shingle at a valley is a slow leak waiting to happen.
- Daylight visible through the ridge cap. The cap shingles along the peak of a new addition take the brunt of wind and sun. If you can see light from the attic side, the cap is compromised.
- Granules collecting in the gutters within the first year. Some granule loss is normal, but heavy accumulation on a new Tamko roof suggests either a manufacturing defect or improper installation, like nailing in the wrong part of the shingle.
- Water pooling where the new fascia meets the old. This is a flashing and drip-edge issue that lets water sit against the fascia board, eventually rotting it even when the shingles look fine from the ground.
See the difference
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After
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AfterReplacement Cost & What’s Included
For a full home addition in Jacksonville, expect $45,000 – $130,000 depending on square footage, whether you’re adding a second story or going out, and the interior finish level. A detached ADU runs $90,000 – $220,000 once you factor in foundation, utilities, kitchen, bath, and the separate Tamko roof system.
Every Elmstead Remodeling Jacksonville price is written down before work starts. You’ll see materials listed by name including the exact Tamko shingle line, underlayment, and flashing components, labor broken into stages, and no allowance line items that quietly grow. If you need roof repair rather than a full addition, roof repair runs $400 – $1,800 in Jacksonville and roof replacement $8,000 – $20,000, depending on what was done wrong the first time.
Our 365-Day Done Right Promise covers every completed project: if something wasn’t done right, we make it right. The written price you approved is the price you pay, and we send a photo of the clean-up before the crew leaves.
DIY or Call Us?
You should not be on a roof repairing Tamko shingles or flashing yourself. A Jacksonville roof in August is dangerously hot, the pitch on most additions is steeper than it looks from the ground, and a fall from even a single-story roofline changes a family’s life. If you suspect a leak, the safe check is from the attic side: look for water staining on the sheathing, feel for damp insulation, and note where the stains line up with the roof penetrations or seams. Then call us.
What you can safely do on the ground is inspect gutters for granule buildup and look for shingles that are visibly curling or missing from eye level. If you see something that doesn’t look right, call (904) 643-6243 and we’ll schedule a walk-through. Estimates are free, and Graham will write the scope in plain language so you know exactly what you’re paying for before anyone picks up a hammer.
FAQs
A properly installed Tamko Heritage or Titan XT roof in Jacksonville typically lasts 25 – 35 years, though our coastal humidity and afternoon storms mean the underlayment and flashing details matter more to longevity than the shingles themselves. Call (904) 643-6243 to have us inspect your existing installation, estimates are free.
In many cases, yes, if the problem is confined to flashing, valleys, or ridge cap, we can repair those areas for $400 – $1,800 without replacing the full roof. If the shingles were nailed incorrectly across the entire plane, replacement is the honest answer, and we’ll show you the evidence before we quote it.
A flashing or valley repair typically takes one day. A full roof on a new addition is usually installed in 3 – 7 working days depending on size and weather. We protect the work site with drop cloths and shoe covers, and we use quiet tools during family rest hours where possible.
We keep Tamko-compatible flashing, ridge cap, valley, and underlayment stock on the truck for repairs, and we order shingles to match your existing roof directly from Tamko’s distribution channel. If you’re also planning interior work, we install KraftMaid and Wellborn cabinetry, Cambria, Silestone, and Caesarstone countertops, and Kohler, Moen, and Grohe fixtures.
Name the material, name the day, name the price, then there is nothing left to wonder about. If you have a failing Tamko roof on your Jacksonville addition or ADU, call (904) 643-6243 to schedule a free estimate. A live person answers, day or night.
Written by Graham Stein, Owner, Elmstead Remodeling Jacksonville at Elmstead Remodeling Jacksonville, serving Jacksonville and nearby areas.
