Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Why San Antonio Homeowners Choose GAF Construction
Elmstead Remodeling San Antonio provides independent GAF roof construction, repair, and storm damage service across Gaf in San Antonio, including full Timberline shingle replacements, EverGuard TPO seam repairs, and Liberty SBS flashing work. What sets our GAF work apart is the combination of field experience with these specific product lines under Texas hail and heat, plus a written price before any work starts, every time. We are not authorized by or affiliated with GAF, but our crews have pulled apart enough failed GAF systems in this city to know exactly what holds up and what doesn’t. Call (432) 233-0976 for a free estimate on any GAF roof project.
San Antonio’s climate punishes roofing materials in a specific way. Intense summer heat bakes shingle surfaces for months, then spring hailstorms pelt them with ice. The cycle repeats year after year. GAF products perform well here when installed correctly, but when installation shortcuts happen or when hail damage goes unaddressed, the failure patterns are predictable. We see them constantly across Alamo Heights, Terrell Hills, Stone Oak, and GAF Construction in Fair Oaks Ranch, TX neighborhoods inside Loop 410.
Graham Stein, owner of Elmstead Remodeling San Antonio, has worked on GAF roofing systems for years and writes every scope of work down before a single tool leaves the truck. The written price you sign is the price you pay. No line items added after demo day.
Why Trust Elmstead Remodeling San Antonio for Your GAF Construction?
Our technicians know GAF products by their specific failure modes, not just their brochures. We can tell you why a Timberline HDZ roof is losing granules in patches while the neighbor’s roof still looks new. We can explain what a split EverGuard TPO seam means for the insulation below it. And we can show you, in writing, what the fix costs before we touch anything.
Graham grew up in Los Angeles and learned construction at Los Angeles Trade-Technical College before spending decades framing, finishing, and repairing what matters to homeowners. He and the crew have worked across San Antonio for years, including projects near the King William Historic District where older homes demand patience and respect for original detail. That background matters on GAF work because roofing failures are rarely just about the shingle. They’re about the deck, the underlayment, the fasteners, and the flashing working together. Graham’s approach has always been: write it down, price it once, do it right.
Every GAF project we take on is governed by the Cedarwell Care Promise. Shoe covers and drop cloths inside the house. A photo of the clean-up before the crew leaves. Quiet tools during nap and school hours where possible. Pet-safe product choices where available. These things are not add-ons. They’re how we work.
Styles & brands we work with
Common GAF Construction Problems We Fix in San Antonio
These are the issues our crews see most often on GAF roofs in San Antonio. Each one has a specific cause, and each one has a right way to fix it.
- Timberline HDZ granule loss from hail and intense UV. San Antonio hailstorms strip granules off the asphalt mat, leaving bald spots that expose the shingle to further UV damage. Left alone, the roof life shortens dramatically. We see this most often on south-facing and west-facing slopes in neighborhoods like Alamo Heights, where afternoon sun is relentless.
- EverGuard TPO seam delamination on flat roofs. San Antonio heat cycles cause TPO membrane shrinkage over time, and the seams are the first place to fail. A split seam lets water into the insulation and eventually the building interior. We repair these with heat-welded patches matched to the existing membrane thickness.
- Starter strip and ridge cap misalignment leading to wind uplift. On many GAF installations, the starter strip along the eaves or the ridge cap at the peak was not aligned properly during the original install. High winds get under the shingle edges and lift them. We correct this by removing and resetting the affected courses with proper GAF adhesive strips.
- Liberty SBS base flashing deterioration around vents and chimneys. The modified bitumen Liberty SBS system relies on flashing details that degrade faster than the field membrane in San Antonio’s heat. Deteriorated flashing around a chimney or plumbing vent is the classic source of “mystery leaks” that only show up after heavy rain.
- StormGuard underlayment failures at the eaves. When GAF StormGuard is missing, improperly lapped, or damaged during a previous repair, water backs up at the eaves during heavy downpours. This shows up as attic water stains along the outer walls. We replace the underlayment at the eaves and re-secure the field shingles above it.
GAF Parts & Our Repair-vs-Replace Approach
Our default position is genuine GAF accessories. When matching an existing warranty or recreating the original system specification, we use GAF Seal-A-Ridge for ridge caps, Deck-Armor for roof deck protection, and StormGuard for leak barrier applications. These are the products GAF designed to work together, and using them keeps the system coherent.
For discontinued items or situations where the genuine part carries an unreasonable cost for what it does, we supply proven aftermarket equivalents only if they meet GAF performance thresholds. We’ll always tell you which we’re using and why, and it’s written on the estimate before work begins.
The repair-versus-replace call is straightforward. When hail damage is isolated to a few shingles or a single slope, repair is usually the right answer. When granule loss exceeds about 30 percent of the roof surface or fasteners have compromised the deck beneath the shingles, replacement is the honest recommendation. We will never push a full roof replacement on a roof with five years of life left, and we’ll never patch a roof that should come off. Call (432) 233-0976 if you’re not sure which category your roof falls into.
Our GAF Service Process – Step by Step
- 1
Diagnosis. A technician walks the roof, photographs every problem area, and documents what’s failed and why. For storm damage, we map each impact point and measure granule loss. You get the photos with your written estimate.
- 2
Written scope and price. Before any work starts, you receive a line-item written scope. We name the exact materials, the exact quantities, and the exact price. The price you sign is the price you pay.
- 3
Repair or installation. For GAF work, this means removing damaged materials properly, inspecting the deck and underlayment beneath, replacing what’s compromised, and installing the new materials to GAF’s published installation standards.
- 4
Testing and photos. We water-test repairs where possible, inspect every seam and fastener line, and photograph the completed work. You get a photo of the finished job and a photo of the clean-up before the crew leaves.
- 5
Warranty. Our workmanship warranty covers our installation. GAF material warranties cover the products. We’ll explain what each covers in plain language and put it in writing.
One field vignette worth sharing, because it shows what we actually do out there. Our tech pulled back a storm-damaged Timberline UHDZ ridge in Terrell Hills to find a 14-foot run of Seal-A-Ridge had torn at the nail line after back-to-back hailstorms. We replaced the ridge cap with proper GAF adhesive strips, re-secured the Timberline field with a 6-nail high-wind pattern, and added new StormGuard underlayment at the eaves. That stopped attic water stains the homeowner had seen for two seasons.
See the difference
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AfterGAF Products We Service & Install in San Antonio
We work on GAF Timberline HDZ and Timberline UHDZ shingle systems, GAF EverGuard TPO for flat and low-slope commercial roofs, and GAF Liberty SBS modified bitumen systems. We install and service the full accessory line: Seal-A-Ridge, Deck-Armor, StormGuard, and the GAF starter strip and hip/ridge products. We stock common GAF accessories locally for faster turnaround, and we can source full Timberline and EverGuard systems quickly through our Gaf in Schertz supplier network.
We Also Service These Brands
GAF is a big part of our roofing work, but we’re multi-brand by design. We install and service KraftMaid and Wellborn cabinetry, Cambria and Silestone countertops, and Kohler, Moen, and Grohe fixtures. If your project involves more than the roof, one crew can handle the whole scope with the same written-price discipline through our General Contractor services.
FAQs – GAF Construction Service in San Antonio
We assess the extent first. For isolated patches, we replace the affected shingles with matching Timberline HDZ color and re-secure the surrounding courses. When granule loss covers more than about 30 percent of the roof or the mat is exposed, we recommend full roof replacement and will show you photos that support that recommendation. Call (432) 233-0976 for a free assessment and exact quote.
Yes. A split TPO seam is repairable with a heat-welded patch matched to the existing membrane thickness. The key is catching it before water saturates the insulation below. If you see a split seam or water staining on a flat roof in San Antonio, get it looked at before the next heavy rain. Estimates are free.
We use genuine GAF Seal-A-Ridge on every GAF Timberline replacement where the original system specified it, which is the overwhelming majority of cases. If the existing roof used a different ridge system and the homeowner wants to match it, we’ll discuss that before the estimate is finalized. The written scope names the exact ridge product, so there’s no ambiguity.
We remove the shingles and any damaged underlayment at the eaves or valleys, inspect the deck for rot or fastener damage, install new StormGuard leak barrier to GAF specifications, and re-install the field shingles using the correct nailing pattern. It’s a targeted repair, not a full re-roof, and the price is set before we start. Call (432) 233-0976 for an exact quote.
Usually yes, especially if the field membrane is still intact. Flashing leaks around vents and chimneys are the most common Liberty SBS failure, and the repair is straightforward when caught early. We’ll inspect the field membrane during the estimate. If the membrane itself is deteriorating, we’ll tell you honestly that replacement may be the better long-term choice.
Here are our market-calibrated ranges for GAF work in San Antonio:
| Service | Price Range |
|---|---|
| Roof Replacement (GAF Timberline HDZ) | $8,000 – $20,000 |
| Roof Repair (shingle replacement / granule repair) | $400 – $1,800 |
| Metal Roof Installation (Standing Seam) | $15,000 – $40,000 |
Your exact price depends on roof size, pitch, deck condition, and access. Call (432) 233-0976 for a written estimate specific to your home. Estimates are free, and the written price is the price you pay.
Book Your GAF Service in San Antonio, TX
If your GAF roof needs repair, storm damage assessment, or full replacement, call Elmstead Remodeling San Antonio at (432) 233-0976. We’ll schedule a walkthrough, document what we find, and hand you a written price before any work starts. A live person answers the phone, 24/7.
Written by Graham Stein, Owner at Elmstead Remodeling San Antonio, serving San Antonio since 2005.
