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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Why Houston Homeowners Choose GAF Roofing
Brennan Roofing Co Houston provides independent GAF roofing repair and installation across Houston, TX, working on Timberline HDZ and UHDZ shingle systems as well as EverGuard TPO flat roofs. What sets our GAF work apart is simple: we see how these specific products fail after real Houston weather, and we fix them with the right parts the first time. We are not a GAF-authorized contractor, and we will never claim to be one. We are a local Houston roofing company that works on GAF systems daily because so many homes in this city were built or re-roofed with them. Call (940) 461-8481 for a free estimate from a crew that knows these roofs down to the flashing details.
Why Trust Brennan Roofing Co Houston for Your GAF Roofing?
Our technicians work on Gaf service in Houston every week, from Timberline HDZ shingle layovers in Meyerland to EverGuard TPO repairs on flat commercial sections in the Energy Corridor. That repetition teaches you things a manufacturer’s spec sheet never will. We know, for example, that Timberline HDZ shingles installed with nails placed too high on the nail strip will lift at the rake edge after a single season of straight-line winds. We know that south-facing Timberline Natural Shadow slopes in Houston lose granules faster than north-facing ones because our UV index punishes them for six months straight. Travis Oakley, owner of Brennan Roofing Co Houston, learned roofing at Los Angeles Trade-Technical College and has spent years putting roofs on everything from bungalows to commercial strips. He brought that hands-on foundation to Houston, and since then his crew has torn off and re-roofed homes from Meyerland to the Energy Corridor, learning exactly what Gulf Coast heat, humidity, and hurricane season do to a deck. When we inspect a GAF roof, we read it straight: no upselling damage that is not there, no downplaying what actually needs to come off. A roof either keeps water out or it doesn’t, everything else is details.
Styles & brands we work with
Common GAF Roofing Problems We Fix in Houston
- Wind-lifted shingles along rake edges on Timberline HDZ roofs. Straight-line winds from Houston thunderstorms hit the rake edge harder than any other part of the roof. If the original installer placed nails even a quarter inch above the reinforced nailing strip, the shingle loses its grip and lifts. We see this constantly after spring storm season. The fix is replacing the lifted shingles and correct nailing on the replacements, not just pressing them back down.
- Granule loss and curling on south-facing Timberline Natural Shadow slopes. Houston’s subtropical sun beats on south-facing roof planes mercilessly. Natural Shadow shingles, which have a lighter, more dimensional profile, shed granules under sustained UV exposure and begin to curl at the edges. Once granule loss reaches the point where the asphalt substrate shows through, that section needs replacement, not a coating.
- Punctures and seam separation on EverGuard TPO flat sections. Houston gets debris from oak trees, construction, and the occasional storm. TPO membranes take punctures from falling limbs, but the bigger issue we see is seam separation where the heat welds fail after years of expansion and contraction in Houston’s humidity. Ponding water accelerates the failure. We inspect seams first on any flat GAF TPO roof.
- Improper nail placement causing shingle blow-off on roofs installed by other contractors. This is the most preventable GAF failure we see in Houston. High nailing is rampant. When a shingle is nailed above the double-layer nailing strip, it only takes one strong wind event to peel it off. We repair these by removing the affected shingles and reinstalling correctly with six nails per shingle, not four.
- Corroded pipe boot flashing on older GAF roofs. The rubber gasket around plumbing vent pipes degrades in Houston’s heat and UV. Once the gasket cracks, water follows the pipe straight into the attic. We replace these with new lead or composite pipe boots during nearly every GAF repair we do. It is a small part that causes big leaks.
GAF Parts & Our Repair-vs-Replace Approach
We use genuine GAF shingles and accessories when they are available locally through our Houston suppliers. For older or discontinued color blends, we source quality aftermarket shingles that match the existing roof closely enough that you cannot pick out the repair from the street. We will always tell you which one we are using before we start, in writing. The repair-versus-replace decision comes down to the decking and underlayment. If the plywood or OSB deck is sound and the underlayment is still doing its job, we repair. If the deck is soft, water-stained, or delaminating, we advise targeted replacement. Patching shingles over a compromised deck just means the leak comes back next season. We would rather tell you the truth now than charge you twice later. Call (940) 461-8481 and we will inspect your GAF roof and give you a written price before any work starts.
Our GAF Service Process – Step by Step
1. Diagnosis
We start with a full inspection of the GAF system, checking shingle adhesion, flashing condition, underlayment exposure, and deck soundness. For TPO roofs, we inspect seams and membrane thickness. Every finding goes on paper with photos.
2. Written Price
Before any work begins, you get a written line-item price. That number does not move at the door. If we find hidden damage once the shingles come off, we stop and show you what we found before spending another dollar.
3. Repair or Replacement
We remove damaged GAF shingles or TPO sections, inspect what is underneath, replace any failed underlayment or decking, and install new materials to manufacturer spec. Our technicians show up background-checked and in uniform. You know exactly who is on your roof.
4. Test
We water-test repairs where possible and walk the full affected area to confirm adhesion and seal. Flashing is checked at every termination point.
5. Written Warranty
Every repair and installation is backed by the 365-Day Done Right Promise. If the repair fails within one full year, we come back and make it right at no charge. That promise is in writing, not a verbal assurance.
See the difference
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AfterGAF Products We Service & Install in Houston
Our Pearland Gaf service crews and Houston teams work on the full GAF residential and commercial line that we see in local neighborhoods. Timberline HDZ is the most common, with its LayerLock technology and wide color availability. Timberline UHDZ is the thicker, heavier-profile option we install on homes where homeowners want deeper shadow lines. Timberline Natural Shadow appears on many 90s-era Houston homes where the dimensional look was popular. On flat or low-slope sections, we repair and install EverGuard TPO, including heat-welded seam repairs. We stock common GAF accessories locally: ridge caps, hip and ridge shingles, pipe boots, and starter strips. When a specific color or product is not on the shelf, we order it and schedule accordingly.
We Also Service These Brands
While GAF is a major part of what we work on in Houston, we are not a single-brand shop. We install and repair Owens Corning Duration and Oakridge shingles, along with CertainTeed Landmark and XT lines. If your roof has a different manufacturer’s product on it, we will tell you honestly whether we can match it or whether a different approach makes sense.
FAQs – GAF Roofing Service in Houston
No. We are an independent roofing contractor serving Houston, TX. We are not GAF-authorized, certified, or factory-affiliated. We do not claim to be. What we offer is hands-on experience with GAF products installed on Houston homes, and we service them with the same standard we apply to every brand: written pricing, uniformed technicians, and a one-year written guarantee.
We use genuine GAF shingles and accessories when they are locally available. For discontinued colors or older product lines, we source quality aftermarket materials that match your existing roof. We tell you which option applies to your job before we start, and the price reflects exactly what we are installing.
Often, yes. GAF has produced dozens of Timberline color blends over the years, and many are discontinued. We carry sample boards and match against current inventory from our Houston suppliers. In some cases, the closest match is a different GAF color, and in others we source an aftermarket shingle designed to blend. We will show you the match on the roof before we order anything. Call (940) 461-8481 and we will take a look.
Granule loss on a young Timberline HDZ roof in Houston almost always points to one of two things: a manufacturing variance, which is uncommon but does happen, or UV overexposure on a south-facing slope combined with poor attic ventilation. When the attic overheats, the shingle bakes from both sides and granules shed prematurely. We check ventilation during every GAF inspection because fixing the roof without fixing the ventilation just means the next batch of shingles fails the same way.
Yes. We provide Gaf repair in Baytown and across Houston, fixing EverGuard TPO seams, punctures, and flashing terminations on flat and low-slope sections. TPO repairs require heat-welded patches or seam repairs, not adhesive caulk. We handle it with the proper tools and techniques so the repair holds through Houston’s thermal cycling.
In most cases, no. Repairs made by a qualified contractor using proper materials and methods do not void the GAF warranty on unaffected areas. However, if the repair is part of an insurance claim or warranty claim, the manufacturer may want to inspect first. We can help you document the damage and the repair. Call (940) 461-8481 and we will walk you through what your specific warranty allows before any work happens.
Yes. If the deck and underlayment are sound, we replace only the damaged shingles and match the color as closely as possible. For Houston storms, that is usually the right call. If the damage is widespread or the underlayment is compromised, we will tell you that too, with a written price for both options so you can decide.
For a GAF shingle repair in Houston, expect to pay between $350 and $900 depending on the size and scope. A full Timberline HDZ re-roof on a typical 2,000-square-foot Houston home typically runs $11,000 to $16,000. EverGuard TPO repairs range from $500 to $2,500 depending on seam length and deck condition. These are honest ranges based on what we see across Houston neighborhoods. Call (940) 461-8481 for an exact written quote, free of charge.
Book Your GAF Service in Houston, TX
If your GAF roof is leaking, lifting, or losing granules, call Brennan Roofing Co Houston at (940) 461-8481 for our Roofing Company services. We will schedule an inspection, put the price in writing before any work starts, and back the repair with our 365-Day Done Right Promise. Houston homeowners deserve a roofer who shows up and does what they said they would do. We are that crew.
Written by Travis Oakley, Owner at Brennan Roofing Co Houston, serving Houston since bringing his trade foundation from Los Angeles Trade-Technical College to Gulf Coast roofing.