Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
GAF Home Additions & ADU: The Fort Worth Owner’s Guide
A GAF-backed addition or ADU in Fort Worth typically runs $45,000 to $130,000 for the full build, and most of our projects are permitted, framed, dried in, and finished on a schedule we put in writing. When a homeowner calls us about a GAF product on an addition or ADU, the conversation usually starts with a roof that isn’t shedding Texas rain the way it should, or an underlayment that’s starting to show through at the eaves. We walk the roof, check the flashing and decking, and give you a straight number before any tools leave the truck.
We’re Bradford Remodeling Co Fort Worth, an independent remodeling contractor. We install and service GAF roofing systems on additions and ADUs throughout Fort Worth, but we’re not affiliated with GAF. Curtis Lane owns the company, and he’s been running crews long enough to know that the difference between a good addition and a leaky one is usually in the details nobody photographs.
Key Takeaways:
- Full GAF-backed additions and ADUs in Fort Worth run $45,000 – $130,000.
- GAF roof systems on new additions should be checked annually, especially after hailstorms that hit Fort Worth’s west side harder than downtown.
- Every scope gets a written price first. That’s The Garrison Standard, and it’s non-negotiable.
Which GAF Models This Applies To
On additions and ADUs, we install three GAF lines most often: Timberline HDZ shingles for the roof, StormGuard underlayment at the eaves and valleys, and WeatherWatch peel-and-stick membrane on low-slope sections. If your addition has a flat or low-pitch roof, the GAF spec changes entirely, and that’s where we see owners get burned. A shingle roof on a 2:12 pitch will fail in Fort Worth, no matter how good the shingle is, because the water doesn’t move off it fast enough in a hard storm. The fix is a GAF TPO or modified bitumen system, and we specify it on the front end, not after the first leak.
How you identify what you have: climb up or send us a photo from the ladder. GAF shingles have a fiberglass mat core with a distinctive blue label on the bundle wrap. The warranty paperwork lists the exact series and the install date. If the previous contractor didn’t leave you paperwork, that’s a red flag, and it’s one of the most common things we correct when we take over a Fort Worth addition that was started by someone else.
We use OEM GAF materials when the manufacturer warranty matters, which it does on a new ADU. For repairs on older additions where the shingle line has been discontinued, we source the closest current GAF match and note the substitution in the written scope. You’ll know exactly what’s going on your roof.
Styles & brands we work with
Signs Your GAF Home Additions & ADU Is Failing
- Granules in the gutters. GAF shingles shed granules as they age, and heavy granule loss in Fort Worth’s heat means the asphalt is oxidizing faster than normal. It’s not always a leak, but it’s a sign the shingle is near the back half of its life.
- Curling at the eaves. The first place a Texas roof fails is the bottom edge. Heat rises off the decking and bakes the shingle from below, and the overhang takes the most sun. Curled shingles let wind-driven rain underneath.
- Water staining on the ADU ceiling. That stain means the water already made it through the shingle, the underlayment, and the decking. By the time you see it inside, the leak has been working for a while.
- Lifted flashing at the addition’s tie-in. Where the new roof meets the main house, the step flashing has to be lapped correctly or water walks right through the seam. This is the most common point of failure we correct on Fort Worth additions.
- Soft decking near the ridge. If you can feel the sheathing flex when you walk the roof, moisture has been sitting on it. GAF’s warranty doesn’t cover the decking when it rots from poor ventilation, and neither do we until it’s replaced.
See the difference
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After
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After
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AfterReplacement Cost & What’s Included
In Fort Worth, a full GAF roof on a new addition or ADU runs $8,000 to $20,000 as a standalone scope, but that’s usually folded into the $45,000 to $130,000 build number for the entire structure. What drives the range: roof pitch, number of valleys, the size of the tie-in to the main house, and whether we’re tearing off an existing layer or starting on fresh decking.
Our written quote separates materials from labor, so you’ll see exactly what the GAF shingles cost and exactly what the crew costs. That’s how Curtis Lane runs every job: straight scope, firm price, no surprises at final walkthrough. The 365-Day Done Right Promise covers the roof work too. If it fails inside the first year, we come back and correct it at no charge.
Typical GAF roof line items on a Fort Worth addition:
- GAF Timberline HDZ shingles, including tear-off where needed: $8,000 – $20,000
- GAF TPO membrane for flat or low-slope ADU sections: $8,000 – $20,000
- Decking replacement, per sheet, if rot is found: quoted in writing before we proceed
- Step flashing, vent boots, and ridge vent: included in the roof line item
DIY or Call Us?
You can check the gutters for granules, look for curling shingles from the ground, and note any interior stains. You should not walk a GAF roof on a Fort Worth addition unless you’re comfortable on a ladder and the pitch is walkable, which most additions are not. Falls are the most common way homeowners get hurt on roofing work, and the hospital bill starts where our roof quote ends.
If you see visible damage or a leak, call us at (682) 204-4897. We’ll send a uniformed, background-checked technician to walk the roof and give you a written assessment. If it’s a simple repair, we’ll say so. If the roof is done, we’ll show you exactly what replacement looks like, in writing, before you commit to anything.
FAQs
A properly installed GAF Timberline roof in Fort Worth’s climate typically lasts 20 to 25 years, though hailstorms and prolonged heat can shorten that. The underlayment and flashing usually fail before the shingles do. Call (682) 204-4897 for a roof inspection, and we’ll tell you where your roof actually is in its life.
Yes, if the damage is isolated to flashing, a small shingle run, or a vent boot, and the decking underneath is sound. We won’t patch a roof that’s already lost structural integrity, because a partial fix on a failing substrate is how you get another leak. We’ll show you the difference on site and quote you both options where they apply.
Most Fort Worth addition roofs are torn off and re-shingled in two to four working days, depending on pitch and weather. A low-slope TPO system on an ADU takes about the same. We schedule a start date in writing and keep the site clean at the end of every day.
Our trucks carry GAF underlayment, flashing, sealant, and fasteners for repairs, and we order full shingle and membrane loads direct from our Fort Worth supplier for replacement work. We also work with KraftMaid, Cambria, and Silestone on interior portions of ADU builds, so the specifications stay traceable from foundation to roof.
Written by Curtis Lane, Owner, Bradford Remodeling Co Fort Worth at Bradford Remodeling Co Fort Worth, serving Fort Worth and nearby areas.
