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Owens Corning Roof Installation in San Antonio: What to Know First
Owens Corning roof installation in San Antonio typically runs $8,500 to $16,500 for a full tear-off and replacement on an average single-family home, depending on the shingle line you choose and what we find under the old roof. We are an independent Owens Corning service provider, which means we install their shingles properly and protect your manufacturer warranty without being tied to one brand’s sales quotas. Most full installations take two to four days once materials arrive.
This page is for homeowners who own an Owens Corning roof or are considering one and want straight answers about failure modes, costs, and what a proper installation actually involves. If you need a written price before any work starts, call (254) 276-4369 and a live person will answer.
How Owens Corning Products Fail – and How We Fix Them
Owens Corning makes solid shingles, but every product line has predictable weak points. Here’s what we see on San Antonio roofs, based on years of pulling apart the old ones.
- Duration Series granule loss from hail impact. The Duration line, especially Duration STORM and Duration FLEX, has a thick granule bed designed for impact resistance. But San Antonio hail doesn’t always rip shingles off; it knocks granules loose in a pattern that looks like dark bruising. Once granules go, the asphalt underneath bakes in Texas sun and the shingle fails within a few seasons. We don’t patch granule loss. We replace the damaged slope and check the decking for impact cracks.
- Oakridge series curling at the eaves due to inadequate attic ventilation. Oakridge shingles are an entry-level architectural line that will curl when attic heat pushes moisture into the decking and then cooks the shingle from underneath. We see this most often in older Alamo Heights homes where ridge vents were installed without soffit intake. We correct the ventilation before we replace the shingles; otherwise the new roof fails the same way.
- Supreme 3-tab shingle blow-off along rake edges. Supreme is Owens Corning’s 3-tab line, and the weak point is the rake edge where wind hits the roof at an angle. If the original installer used short nails or missed the nail line, the tabs lift and snap. We hand-nail rake courses on every replacement and verify nail placement against the Owens Corning installation spec.
- Decking rot hidden under leaking valleys on Woodmoor and Woodcrest roofs. Those older lines from the 1990s and early 2000s were often installed with narrow valley metal that flexes and cracks at the seams. Water runs under the shingles and rots the plywood silently. When we tear these off, we replace rotted decking and upgrade to full-width W-valley metal, which drains faster and leaves no seam for water to find.
- Improper starter strip leading to shingle delamination along the eave. This isn’t a problem with the shingle; it’s a problem with the original install. But it shows up as Owens Corning failures because the first row delaminates at the sealant strip. We use Owens Corning’s recommended starter strip product and double-check the strike line before the first full course goes down.
Styles & brands we work with
Our Owens Corning Roof Installation Process
Here’s what happens when you call us for an Owens Corning roof installation in San Antonio, step by step.
- 1
Call and estimate. You reach a live person. We schedule a visit. You get the name and photo of the technician before they arrive.
- 2
Inspection and written price. We inspect the decking, flashing, underlayment, and ventilation. We give you a written line-item price before any work starts. No open-ended estimates.
- 3
Material selection. We show you the Owens Corning lines that fit your house and budget: Oakridge, Duration, or Duration STORM if hail is a recurring concern. We explain the price difference and let you decide.
- 4
Tear-off and decking check. We strip the old roof and replace any rotted or damaged decking. This is where hidden problems surface, and our written price already accounts for what we can see beforehand.
- 5
Installation to spec. Underlayment, ice and water shield in valleys and penetrations, starter strip, shingles nailed to Owens Corning’s published spec, and ridge cap installed with fresh ventilation.
- 6
Cleanup and walkthrough. We magnet-sweep for nails, walk the job with you, and hand you the written guarantee. The 365-Day Done Right Promise is on every job we install.
See the difference
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AfterWhat Owens Corning Roof Installation Costs in San Antonio
Here are honest ranges for common Owens Corning scenarios in the San Antonio market, based on typical single-family homes between 1,500 and 2,500 square feet.
- Full tear-off and replacement with Oakridge: $8,500 – $12,000
- Full tear-off and replacement with Duration: $9,500 – $13,500
- Full tear-off and replacement with Duration STORM: $11,000 – $16,500
- Partial slope replacement after hail damage: $2,800 – $5,500 depending on slope size and pitch
- Decking replacement (per sheet, if needed): $85 – $120
What moves the price: roof pitch, number of valleys and penetrations, decking condition, and whether we need to bring the attic ventilation up to code. We give you the written number before we start, and we don’t come back with surprise change orders. Call (254) 276-4369 for a free estimate with a real price in hand.
Why San Antonio Homeowners Call Mercer Roofing Co San Antonio for Owens Corning Work
We are not the cheapest roofer in San Antonio, and we don’t try to be. We’re the company that sends you the technician’s name and photo before they arrive, checks their background and identity under the Threshold Verified standard, and has them badged and in uniform at your door. For homeowners who are home alone during the day or have young kids, that matters more than saving a few hundred dollars on a roof you’ll live under for twenty years.
We also maintain the multi-brand backup that Owens Corning-only shops can’t offer. If your roof needs repair instead of replacement and the matching Owens Corning shingle is discontinued, we can source a color match from GAF or CertainTeed lines we know well. Our 365-Day Done Right Promise means if anything on the job isn’t right within a year, we come back and make it right. Written guarantee, every install. Grant Whitlock, our owner, is the sort to show up on time and explain exactly what’s going on up there before a single nail gets driven. A roof shouldn’t be something you worry about – that’s our job.
FAQs
No. Owens Corning warranties are tied to proper installation, not to a specific contractor. As an independent Owens Corning service provider, we install to their published specifications, which keeps your manufacturer warranty intact. Our own 365-Day Done Right Promise applies on top of that, in writing, on every job.
Most full tear-off and replacement jobs take two to four days of on-site work once materials are delivered. Decking replacement, steep-pitch sections, or complex flashing around chimneys in older neighborhoods like Alamo Heights can add a day or two. We give you a time window in the written estimate, and we keep it.
If the shingles are less than ten years old and the damage is isolated to one slope, repair usually makes sense. If granule loss is widespread or the decking has rot, replacement is the honest answer. We’ll tell you which one we’d choose if it were our house, and the written price covers either path before we start.
We use Owens Corning shingles and their specified starter strips and ridge cap products on every Owens Corning installation. For repair jobs where the exact color has been discontinued, we source the closest available match from quality manufacturers like GAF or CertainTeed and show you the match before we commit. Call (254) 276-4369 for a free estimate; we’ll put every material and price in writing.
If anything on your new Owens Corning roof is not done right within 365 days of the install, we make it right at no charge. That includes workmanship issues, not storm damage. The promise is written on your estimate and your final paperwork, so there’s no question what’s covered. Call (254) 276-4369 to get started with a free written estimate.
Written by Grant Whitlock, Owner, Mercer Roofing Co San Antonio at Mercer Roofing Co San Antonio, serving San Antonio and nearby areas.