Owens Corning Roofing Company Nationwide

Owens Corning Roofing Company in San Antonio: What to Know First

Mercer Roofing Co San Antonio provides independent Owens Corning roof repair, replacement, and inspection across San Antonio, with most repairs completed same-day and full replacements typically finished in one to three days depending on roof size and weather. We are not an Owens Corning dealership and we’re not affiliated with the manufacturer. What we are is a local roofing company that works on Owens Corning shingles every week, gives you a written price before any work starts, and backs every repair with a 365-day written guarantee. If you own a home with Owens Corning shingles and you’ve got a leak, missing shingles, or just want an honest assessment, call (254) 276-4369 and a live person answers.

Call (254) 276-4369

How Owens Corning Products Fail – and How We Fix Them

Owens Corning makes solid shingles, but every product line has its own failure patterns in South Texas heat. Here’s what we see on San Antonio roofs and what we do about it.

• Duration Series granule loss and blistering. Owens Corning Duration shingles, especially the standard (non-SureNail) versions installed before roughly 2018, can develop small blisters after years of San Antonio sun exposure. The asphalt cooks, gases form under the granule layer, and you get what looks like tiny pimples across the shingle face. Once blisters pop, granules wash away and the shingle loses UV protection. Our fix is selective shingle replacement when the damage is isolated, or a full re-roof when blistering covers more than 30 percent of the roof. We’ll show you photos of the difference so you can see exactly what we’re seeing.
• Oakridge shingle curling at the eaves and rakes. Owens Corning Oakridge shingles are a mid-weight architectural shingle, and in San Antonio they’re prone to curling at the roof edges, particularly on west-facing and south-facing slopes. The cause is usually a combination of heat and inadequate attic ventilation rather than a manufacturing defect. Curled shingles catch wind and become tear-off points in storms. We fix the underlying ventilation problem first, then replace the curled shingles, because replacing shingles without fixing airflow means you’ll be back in the same spot in two years.
• SureNail strip nailing issues on re-roofs. This one’s more of an installer problem than a shingle problem, and it’s specific to Owens Corning’s SureNail fabric strip on the TruDefinition Duration line. If the original installer nailed above the fabric strip, the shingle lacks the holding power it was engineered for, and you get shingles slipping or blowing off in winds well below their rating. We check nail placement during every Owens Corning inspection and re-nail or replace shingles that were installed wrong. It’s the kind of thing most people don’t discover until a shingle lands in the yard.
• Valley and flashing failures on Alamo Heights older homes. We’ve worked a lot of Owens Corning re-roofs in the Alamo Heights area, where older homes have steeper pitches and original metal flashing that’s been on the roof for 30-plus years. The shingles often look fine, but the flashing at dormers and valleys has corroded or separated, and water gets underneath the Owens Corning field shingles. We pull back the affected shingles, replace the flashing, re-seat the shingles, and re-seal everything. Grant Whitlock, our owner, has spent years on these older San Antonio homes and will tell you straight: the flashing fails long before the shingles do.
• Storm damage that Owens Corning handles well, but only if caught early. Owens Corning Duration Storm shingles are rated for 130 mph winds and meet Texas wind code, but no shingle is immune to a 3-inch hailstone. San Antonio hail storms can crack the shingle mat beneath the granule layer, and the damage is invisible from the ground. We do a full impact inspection with chalk markings on every suspected hail-hit area, document every crack, and give you a written report you can use if you’re filing an insurance claim. We’re not insurance adjusters, but we’ll make sure you have the evidence a good claim needs.

Our Owens Corning Roofing Company Process

Here’s what happens when you call us about your Owens Corning roof, from first call to final walkthrough.

1. 1
   You call (254) 276-4369. A real person answers, 24/7. No voicemail tree, no “press 2 for existing customers.” You tell us what’s happening on your roof, and we schedule a visit at a time that works for you.
2. 2
   You get a text with your technician’s name and photo. Before anyone shows up at your door, you know exactly who’s coming, what they look like, and that they’ve been background-checked and identity-verified under the Threshold Verified standard. When they arrive, they’ll be in a clean, marked uniform and they’ll show a photo ID badge at the door. No surprises.
3. 3
   We inspect the Owens Corning roof and document everything. We walk the roof, check nail placement, flashing, ventilation, and shingle condition. We take photos and show them to you on our tablet, so you’re not trusting a stranger’s word about what’s wrong. You see it, we explain it, you decide.
4. 4
   We give you a written price before any work starts. Not a verbal estimate, not a “we’ll see how it goes.” A written line-item price for the exact work we discussed. If something changes during the job, we stop and get your written approval. No surprise invoices, ever.
5. 5
   We do the work. Whether it’s a single shingle replacement, a flashing repair, or a full Owens Corning re-roof, we use quality materials and install them to manufacturer spec. If we’re replacing shingles, we match your existing Owens Corning color as closely as possible and tell you if an exact match isn’t available before we order anything.
6. 6
   We test, clean up, and give you your guarantee in writing. We run water on the repaired area when the job type allows it, sweep for nails with a magnet, and walk the roof one more time before we leave. Every repair comes with a written 365-day guarantee. If it fails within a year, we come back and make it right, free.

What Owens Corning Roofing Company Costs in San Antonio

Here’s what San Antonio homeowners can expect to pay for common Owens Corning roofing work, based on what we see across the city.

• Single shingle replacement (small repair): $150 – $350, depending on roof pitch and accessibility. One-story walkable roofs are on the lower end; steep two-story cuts run higher.
• Flashing repair or replacement at a chimney, dormer, or valley: $275 – $650 for typical San Antonio homes. If we have to source custom metal flashing for an older Alamo Heights home, the top end can run to $800.
• Localized shingle repair (under 100 square feet): $300 – $750 depending on how many shingles, whether decking underneath needs work, and roof height.
• Full Owens Corning re-roof (average San Antonio home, roughly 2,000 – 2,500 square feet of roof area): $12,000 – $21,000, with the biggest variables being shingle line (Oakridge runs lower, Duration and Duration Storm run higher), tear-off of existing layers, decking replacement, and ventilation upgrades.
• Roof inspection only: $99 – $175, and if we find a repair we can do the same day, we’ll apply the inspection fee toward the repair.

What moves the price the most: roof height and pitch, how many layers of old shingles need to come off, and whether the decking beneath is still sound. We’ll always give you the written number before any work starts. Call (254) 276-4369 for a free estimate on your specific roof.

Why San Antonio Homeowners Call Mercer Roofing Co San Antonio for Owens Corning Work

Most roofing companies can put shingles on a roof. What’s harder to find is a company that treats the front door with as much respect as the roofline, and that’s where we’ve built our reputation in San Antonio. Every technician who comes to your home has been background-checked, identity-verified, and badged under the Threshold Verified standard, and you get their name and photo before they arrive. That matters when you’re home alone, when your kids answer the door, or when you’ve seen too many stories about strangers who show up claiming to “notice roof damage.”

Beyond the door, we know Owens Corning shingles the way a mechanic knows a specific make of truck. We know what fails in San Antonio heat, we know what hail does to the mat, and we know how to fix it right the first time. If your roof needs a different brand because Owens Corning doesn’t make the specific product your home needs, we also work with GAF and CertainTeed and will tell you honestly if a different shingle is the better call. All of it is backed by our 365-Day Done Right Promise: if it’s not right within a year, we make it right. Written price before work starts. Written guarantee on every repair. That’s the deal, every time.

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