Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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AfterGAF Construction in San Antonio, CA | Rowan Construction Group
We’re an independent GAF service provider offering GAF service in Austin and working on roofs across San Antonio, from Timberline shingle tear-offs to EverGuard TPO membrane repairs. The thing that separates our GAF work here is that we plan every job around San Antonio’s split geology and aquifer rules before the first shingle comes off. Call (470) 298-9650 for a written estimate.
Why San Antonio Residents Choose Us for GAF Service
Our crews have worked on GAF roofing systems across every part of San Antonio, including Timberline tear-offs in Stone Oak and TPO repairs along the IH-10 corridor, so we know exactly how GAF products perform under Edwards limestone dust, flash-flood humidity, and weeks of 100°F-plus heat. We are an independent provider, not affiliated with or authorized by GAF, but we stock common GAF accessories and match their installation specs because it produces better outcomes for our clients. Grant Rowan founded this company in 2007 after training at Los Angeles Trade-Technical College, and the discipline he brought from that program, written prices before work starts, signed change orders, documented photo records, shows up on every GAF roof we touch in San Antonio.
Common GAF Construction Problems We Solve in San Antonio
- Wind uplift at gable ends on Timberline shingles. San Antonio’s spring severe thunderstorms funnel wind through the canyons along the Balcones Escarpment. We regularly see Timberline tabs torn loose at gable ends on homes near the escarpment where gusts hit 60 to 70 mph. The fix starts with inspecting the nailing pattern, not just replacing the tabs.
- Thermal splitting on GAF TPO seams. Rooftop temperatures in San Antonio regularly exceed 150°F in July and August. After years of that heat cycling, TPO seams can develop splits that only leak during the first heavy rain after a drought. We probe the seams, find the failed welds, and re-weld with the correct hot-air settings.
- Granule loss from UV and hail on south-facing slopes. Spring supercells drop hail, and the south-facing slopes take the worst of the UV. A Timberline roof in San Antonio can lose enough granules in 10 to 12 years that the shingles crack prematurely. We assess whether it’s a repair or a full replacement, and we’ll tell you straight.
- Improper flashing at roof-to-wall intersections. Expansive Vertisol clay on the south and east sides of San Antonio shifts fascia boards during drought cycles. That movement breaks the seal on flashing where the roof meets vertical walls. We see this constantly on 1970s through 1990s brick-veneer slab homes.
- Failed StormGuard at valleys and penetrations. San Antonio’s flash-flood rain events test valley membranes harder than steady rain does. When old StormGuard fails, water stains show up on the decking before the leak is visible inside. We replace the membrane and the affected decking, not just the shingles above it.
BeforeAfterGAF Service in San Antonio: What Local Conditions Mean for Your Equipment
Here’s the detail that matters, and it’s specific to San Antonio. Any GAF roof replacement in the Edwards Aquifer Recharge Zone, which covers much of Stone Oak, Hollywood Park, and the far north side, requires SAWS-approved stormwater management and impervious cover limits during tear-off and re-roofing. No other major Texas city applies this regulation to roofing projects. What it means for you as a homeowner: if your contractor doesn’t plan temp protection and debris containment the right way, the city can fine you, not the contractor. Our crews pre-plan that protection on every job in the recharge zone. We tarp exposed decking at night, keep debris out of the storm drains, and document the whole thing with photos. A roofing crew from out of town might not know the rule exists until the SAWS inspector shows up. We do, because we’ve been doing GAF work in San Antonio long enough to have it baked into the estimate.
GAF Models & Products We Service in San Antonio
We service the full range of GAF roofing products installed across San Antonio. That includes Timberline HDZ, Timberline Natural Shadow, Grand Sequoia, and EverGuard TPO. We use genuine GAF accessories like Seal-A-Ridge, Deck-Armor, and StormGuard when matching existing installations or repairing under warranty. For older discontinued color blends, we source quality aftermarket shingles that visually match and hold up to San Antonio’s UV. We’re honest about when a repair makes sense, like a small hail-bruised area, versus a full replacement on a 15-year-old GAF roof with widespread granule loss and curling. You’ll get a written recommendation, not a sales pitch.
GAF Service Pricing in San Antonio
| Service | Price Range |
|---|---|
| GAF Timberline HDZ Roof Replacement (typical 20-30 sq) | $10,000-$18,000 |
| StormGuard leak-barrier replacement around valleys and penetrations | $600-$1,500 |
| Emergency tarp and temporary seal after storm damage (labor + materials) | $400-$1,000 |
What drives the cost in San Antonio is the decking condition underneath, which we can’t know until the shingles come off. Expansive clay movement often means more decking replacement than a bid assumed, similar to challenges we address with Driveway & Pavers - San Antonio projects. Our written estimate covers the known scope, and any change requires a signed change order before work proceeds. Under Clause 1 of the Haven Standard, the price is written before anyone starts. Call (470) 298-9650 to schedule your free estimate.
Serving San Antonio, TX - Our Local Coverage Area
We’re based in the San Antonio area and know this community well, including our Fence Installation in San Antonio. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - GAF Construction in San Antonio
Yes, especially when it comes to sealing. Shingles need time and heat to seal properly, but San Antonio’s extreme heat can cause the adhesive to cure too fast if the roof is installed mid-afternoon. We schedule tear-offs for early morning and use the correct nailing pattern so the shingles seal evenly and stay sealed.
Thermal splitting. Years of 105°F-plus rooftop temperatures expand and contract the membrane, especially along the seams. During a drought, the roof stays dry so the splits go unnoticed. Then the first heavy rain comes and water finds the failed welds. We inspect the seams, identify the split welds, and re-weld them with the correct hot-air equipment. Call (470) 298-9650 and we’ll send someone to look at it.
Yes. GAF has discontinued many color blends over the years, and San Antonio’s older homes often have them. We source quality aftermarket shingles that visually match the existing roof, and we’ll tell you if the match will be close but not exact. You’ll get photos of the proposed match before we install anything.
GAF’s warranty structure depends on who installs the roof and which accessories are used. As an independent provider, we’re not authorized by GAF, which means a full manufacturer warranty may not apply. We’ll lay out exactly what your warranty situation is before the job starts and put it in writing. No surprises.
Mostly, yes. Stone Oak sits inside the Edwards Aquifer Recharge Zone, and SAWS enforces stormwater and impervious cover rules on re-roofing projects there. We handle the SAWS requirements as part of the job, including debris containment and temp protection, so you don’t get caught with a fine. Call (470) 298-9650 for an exact quote; estimates are free.
Service Areas Near San Antonio
We serve San Antonio service area and the surrounding communities. For GAF work in other Texas markets, see GAF service in San Diego and GAF service in Dallas. For more on our GAF expertise, visit GAF sales & service.
Book Your GAF Service in San Antonio Today
Call (470) 298-9650 to schedule your free written estimate. We serve San Antonio and the surrounding areas, and our crews are background-checked and uniformed. You’ll get a documented photo record on every visit, included as standard. Measure twice, say it once, show your work.
Written by Grant Rowan, Owner at Rowan Construction Group, serving San Antonio since 2007.