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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Tamko Roofing Company in San Antonio: What to Know First
Mercer Roofing Co San Antonio provides independent Tamko roofing repair and replacement across San Antonio, with most repair jobs completed in a single visit once we diagnose the problem. A written price always comes before any work starts, and every repair carries our 365-day Done Right Promise. If you own a Tamko roof and something looks wrong, call (254) 276-4369 and a person answers, day or night.
This page is for San Antonio homeowners who have Tamko shingles or a Tamko roof system and want a roofing company that understands how these products perform in South Texas heat, hail, and humidity. We work on Tamko roofs regularly, and we know which Tamko lines hold up, which ones struggle, and how to repair them without voiding the manufacturer warranty. We are an independent Tamko service provider, not an authorized Tamko installer, which means we give you straight answers about what your roof actually needs.
How Tamko Products Fail – and How We Fix Them
Tamko makes solid roofing products, but every brand has patterns. After years of working on Tamko roofs in San Antonio, here are the failures we see most often, the cause, and what we do about it.
- Heritage series shingle blow-offs along rake edges. Tamko Heritage shingles (including Heritage Woodgate and Heritage Vintage lines) are a common sight in older San Antonio neighborhoods. The sealant strip on these shingles can lose its grip after repeated thermal expansion, especially on west-facing slopes that bake all afternoon. We see shingles torn loose near the rake edge, where wind gets under the exposed tabs. Our fix is to re-secure the lifted shingles, check the surrounding course for weakened seals, and replace any that have lost flexibility. We don’t cover up the symptom; we find every loose tab before it becomes a leak.
- Tamko’s Titan XT and crack-prone summer installation. Titan XT is heavier and self-sealing, but if the original installation happened between May and September, the adhesive can activate too fast during installation and create a weak initial bond. Homeowners don’t know this because it’s not in the marketing material. What you get is shingles that look fine for a year or two, then start shifting. We identify the age and installation season of the roof, inspect the bond strength across the field, and replace delaminated sections where the self-seal is no longer viable.
- MetalWorks steel shingle denting from hail, not just cosmetic. Tamko’s MetalWorks line is marketed as impact-rated, but Stone-Coated Steel can still dent under San Antonio’s occasional big hail. A dented panel is not just cosmetic. The stone coating chips away, the underlying steel is exposed to moisture, and rust starts where the dent creased. We treat hail-dented MetalWorks as a developing leak point and replace individual panels when the crease depth exceeds the coating’s tolerance.
- Lamarite slate composite cracking at ridge caps. Lamarite slate and shake composites handle heat well, but the ridge cap pieces take the most UV load and are the first to become brittle. We see hairline cracks running along the cap profile, especially on two-story homes in Alamo Heights where the slope gets full sun from noon until sunset. Once water gets into a cracked cap piece, it follows the fastener line down into the decking. We replace cracked caps and check the underlayment beneath them before closing up.
- Decking rot under Tamko 3-tab roofs with original felt underlayment. Many San Antonio homes built in the 1990s and early 2000s used Tamko 3-tab shingles over standard felt. Felt breaks down faster in our humidity than synthetic underlayment does. By the time the shingles look worn, the decking beneath the eaves and valleys often has soft spots. On a Tamko roof repair we don’t just nail new shingles over the problem. We lift the area, probe the decking, and replace rotted sections with proper CDX plywood before reinstalling the shingle course.
Styles & brands we work with






Our Tamko Roofing Company Process
- 1
You call (254) 276-4369. A person answers. You describe what you’re seeing: a leak, missing shingles, granules in the gutter, or a dent after last night’s storm. We book a time that works for you and send the technician’s name and photo to your phone before he arrives.
- 2
The technician arrives and badges in. You’ll see a marked uniform and a photo ID badge at the door. The tech listens, then gets on the roof and inspects the whole field, not just the spot you flagged. On Tamko jobs, we’re checking sealant bonds, flashing at penetrations, and the condition of the underlayment.
- 3
You get a diagnosis in plain English. We tell you exactly what’s failing, why it failed, and what it will take to fix it. If it’s a Tamko Heritage sealant issue, we say that. If it’s a flashing problem unrelated to the shingle brand, we say that too. No upselling, no mystery.
- 4
Parts decision: OEM versus quality aftermarket. For a Tamko repair, some components need to be Tamko-matched to preserve your warranty and get the color right. Other components, like flashing, underlayment patches, and sealant, are better sourced from quality aftermarket brands that outperform original spec in our climate. We walk you through that decision and put the price in writing before we touch your roof.
- 5
Repair, test, and document. We fix it, water-test the area if it’s a leak, and take photos of the finished work. You get a written guarantee on the repair, backed by the 365-Day Done Right Promise: if it’s not right within a year, we come back at no charge.
See the difference
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AfterWhat Tamko Roofing Company Costs in San Antonio
You should know what to expect before you call. Here are the price ranges we see for common Tamko roof work in San Antonio:
- Small Tamko shingle repair (loose or missing shingles, small leak): $325 – $575
- Flashing repair or replacement on a Tamko roof (valley, chimney, or pipe boot): $400 – $850
- Tamko ridge cap replacement along one ridge line: $450 – $700
- Decking repair with Tamko shingle replacement (rot section): $600 – $1,200 depending on square footage
- Full Tamko roof replacement (tear-off, underlayment, installation, disposal): $9,500 – $17,000 for a typical San Antonio single-story home, depending on the Tamko line you choose and the condition of the decking
What moves the price: the pitch of your roof, whether the decking needs replacement, the specific Tamko product line, and whether we’re matching existing shingles for a repair or starting fresh. Every estimate is free, and the written price is exact. No change orders, no surprises. Call (254) 276-4369 to schedule your free estimate.
Why San Antonio Homeowners Call Mercer Roofing Co San Antonio for Tamko Work
We solve the problem most roofing companies won’t talk about: you don’t really know who’s climbing onto your home. Every Mercer Roofing Co San Antonio technician is background-checked, identity-verified, and held to the Threshold Verified standard. Before he arrives, you get his name and photo. At the door, he shows a matching photo ID badge. That’s not a courtesy; that’s how we believe roofing work should happen.
Then there’s the work. Grant Whitlock learned the trade through the construction technology program at Los Angeles Trade-Technical College and has spent decades on real roofs, including the older Alamo Heights homes where Tamko shingles and tricky flashing go hand in hand. He and the crew know how Tamko lines behave in San Antonio weather. And if we ever tell you a roof would be better served by a different brand, we’ll say so. We install GAF, Owens Corning, and CertainTeed as well, so the recommendation is based on what’s right for your home, not what’s on our truck.
Every repair includes a written guarantee. Free second visit if it fails. A roof shouldn’t be something you worry about; that’s our job.
FAQs
No. As an independent Tamko service provider, we follow Tamko’s installation guidelines so your manufacturer warranty remains intact. What can void a Tamko warranty is improper repair work, like using mismatched shingles, incorrect fasteners, or sealing over ventilation gaps. We match the product and the method, and we document the repair so you have a record if you ever file a warranty claim.
Usually, yes. Tamko’s color lines, like the Heritage series colors or the Titan XT options, have remained fairly consistent, and we can source matching bundles or close-match tiles for repairs. The exception is sun-faded roofs: a brand-new shingle will never perfectly match a roof that’s spent ten years in Texas sun. We’ll show you the match before we install it. Call (254) 276-4369 and we’ll check your Tamko line and color.
If the damage is isolated, usually one area, a repair makes sense. If you’re seeing granule loss across the whole field, multiple leaks, soft decking, or shingle seal failure in several sections, a replacement might cost less over the next five years than patchwork repairs. We’ll inspect and give you both the repair price and the replacement price, in writing, and let you decide. Estimates are free.
Most non-emergency Tamko repair calls in San Antonio are scheduled within a few days. If you have an active leak, call (254) 276-4369 and tell us; we prioritize leak calls and will get a technician out as soon as possible. A live person schedules the visit, not a callback form.
Every repair we make on a Tamko roof is covered for a full year. If the repair fails within 365 days, we return and make it right at no charge. The guarantee is written and included with every repair job. You don’t have to ask for it or pay extra for it.
If you need a Tamko roofing company in San Antonio that gives you a name, a face, a written price, and a written guarantee before work begins, call Mercer Roofing Co San Antonio at (254) 276-4369. Your estimate is free, and a real person answers.
Written by Grant Whitlock, Owner, Mercer Roofing Co San Antonio at Mercer Roofing Co San Antonio, serving San Antonio and nearby areas.