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Unilock Roofing: The San Antonio Owner’s Guide
If your Unilock roofing system is failing, we stock Unilock-compatible replacement parts and install them throughout San Antonio, typically at $600 – $2,500 for repairs and $8,000 – $20,000 for a full roof replacement. Most owners call us after spotting a leak near a valley or noticing shingle granules in the gutter after a hard Texas storm. The part that fails first on a Unilock roof in this climate is rarely the shingle itself. It’s the flashing, the underlayment, or the sealant at a penetration, and most of those failures are repairable same week.
What you’re experiencing right now: water staining on a ceiling, damp insulation in the attic, or shingles lifting at the edges after wind. You want to know if it’s a patch job or a full tear-off. You want a real price, not a mystery number. That’s exactly what this page answers.
Which Unilock Models This Applies To
Unilock is best known for concrete pavers and retaining walls, but their roofing line includes concrete and composite roof tiles used across San Antonio’s higher-end neighborhoods. The compatibility gotcha most homeowners hit: Unilock roof tiles are not universal. Tile profiles vary by series, and a tile from one production run won’t always seat correctly against a tile from another, even if they look identical from the ground. The right move is to match by profile code and batch stamp, not by color alone.
If you have the original install paperwork, look for a series designation like the Unilock R-tile or S-tile profiles. If you don’t, we can identify it from a photo or a quick site visit. On the OEM-vs-aftermarket question: for Unilock specifically, we recommend OEM tiles when we’re matching an existing field. Aftermarket concrete tiles can be within a millimeter of spec and still telegraph a mismatch at the roofline. For underlayment, flashing, and fasteners, quality aftermarket equivalents from GAF or Owens Corning are often the better call because they’re engineered for Texas heat and UV exposure. We carry both options and we’ll tell you honestly which one fits your roof and your budget.
Styles & brands we work with
Signs Your Unilock Roofing Is Failing
- Water staining on ceilings or walls after rain. This is the number-one call we get from San Antonio homeowners. It usually means flashing at a valley, chimney, or vent has separated, letting water run under the tile.
- Concrete tile fragments in gutters or on the ground. Tiles crack from impact (hail, tree limbs) or from thermal stress. A cracked tile is an open door for water, but it’s usually a one-tile fix if caught early.
- Visible underlayment through gaps at the roofline. Tile shifts over time, especially after a decade of San Antonio freeze-thaw cycles. If you can see felt or synthetic underlayment, the roof’s first line of defense is exposed.
- Granules on the driveway after storms. This applies to composite Unilock shingles. Granule loss means the protective surface is wearing thin, and in Texas sun, that wear accelerates fast.
- Musty smell in the attic or damp insulation. This is the silent one. By the time you smell it, water has been getting in for weeks, and the underlayment is likely compromised in that area.
See the difference
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After
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After
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AfterReplacement Cost & What’s Included
In San Antonio, Unilock roof repairs run $600 – $2,500 depending on scope: a single cracked tile replacement might run $150 – $300, while a flashing replacement at a chimney or valley typically lands between $400 and $1,200. A full roof replacement on a standard San Antonio single-family home runs $8,000 – $20,000, driven by roof size, pitch, tile profile availability, and whether the underlayment needs full replacement (it usually does on a roof over 15 years old).
Every price we give is a written, line-item quote before any work starts. Parts and labor are broken out separately. No change orders at the door. The number you approve is the number on the invoice, per The Relay Standard. Our work is covered by the 365-Day Done Right Promise: if it’s not done right, we make it right. That’s in writing on every repair.
DIY or Call Us?
If you’re comfortable on a ladder, you can safely check your gutters for tile fragments, inspect the attic for water staining, and photograph any visible damage for a quick phone consult. That’s all useful. What you should not do is walk a concrete tile roof. Concrete tiles crack under foot traffic, and a roof pitch over 4/12 is where falls happen. Working at height with a failing roof surface is genuinely dangerous. We tell every homeowner the same thing: let us do the roof work. Walking tiles wrong turns a $300 repair into a $3,000 repair, and that’s before you factor in the ER bill.
Call (432) 547-6806 and we’ll come out, inspect the roof, and give you a written price. If it’s a quick fix, we handle it fast. If it’s bigger, you’ll know exactly what it costs before you commit.
FAQs
Unilock concrete tile roofs typically last 30 – 50 years in San Antonio, but the underlayment beneath them usually needs replacement at the 20 – 25 year mark, and that’s the part most homeowners overlook. Call (432) 547-6806 for an inspection that checks both.
A crack can sometimes be sealed and painted to match, but in most cases replacement is the honest fix because concrete tile cracks spread with San Antonio’s freeze-thaw cycles. Call (432) 547-6806 and we’ll tell you which path makes sense for your roof.
A typical flashing or tile repair takes one day, and a full underlayment replacement usually runs two to three days depending on roof size and weather. Call (432) 547-6806 for a schedule based on your specific roof.
We stock common Unilock tile profiles and all major underlayment and flashing components on our trucks, and we source OEM tiles for older or less common profiles within a few days. Call (432) 547-6806 and we’ll confirm what your roof needs.
Need help now? Call (432) 547-6806 for a free estimate. Luca Romano and the crew at Sawyer Remodel San Antonio will give you a written price, a straight answer on the repair, and no surprises. The craft comes first. Everything else follows.
Written by Luca Romano, Owner, Sawyer Remodel San Antonio at Sawyer Remodel San Antonio, serving San Antonio and nearby areas.
