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Unilock Roofing: The San Antonio Owner’s Guide
Unilock roofing components in San Antonio typically run $600 to $2,500 installed when repair or replacement is needed, depending on the part, the roof pitch, and how much flashing or underlayment has to be redone alongside it. We stock common Unilock-compatible roofing parts on our trucks and can usually match and install the failed piece during a single visit once we see it. Most homeowners discover the problem the same way: a water stain on the ceiling after a hard Hill Country storm, a missing cap visible from the driveway, or granules collecting in the gutters faster than usual.
Which Unilock Models This Applies To
Unilock’s roofing line spans a few distinct product families, and the part you need depends on which one sits on your roof. The concrete roof tile series (common on San Antonio homes built from the late 1990s through the 2010s) uses interlocking tiles with a specific profile: measure the width and the overlap lip, because a tile from one Unilock mold will not seat correctly on a different one. The composite shake and slate profiles share a similar look but use different fastening patterns, so the nail slot location matters more than the visual match. If you can find a label on the underside of a loose tile, it will show a mold number; photograph it and bring it to the call when you schedule.
For most Unilock roofing parts, the honest answer is OEM when it’s available. Aftermarket equivalents exist, but interlocking tolerances are tight, and a tile that’s 1/8 inch off will telegraph across the roofline. We’ll quote OEM first and offer a proven aftermarket option only when the mold has been discontinued and we’ve installed that substitute successfully on other San Antonio homes. Mason Remodeling Co San Antonio is an independent service provider; we’re not affiliated with Unilock, but we work with their roofing products regularly and know which part numbers cross over.
Styles & brands we work with
Signs Your Unilock Roofing Is Failing
- Water stains on ceilings or exterior walls after rain. The most common cause is a cracked or dislodged Unilock roof tile letting water reach the underlayment, which is not designed to hold water for long stretches of time.
- Granules from concrete or composite tiles in your gutters. Surface erosion is normal with age, but a heavy, sudden load of granules signals the tile face is degrading faster than it should, often from freeze-thaw cycles or impact damage.
- Missing tiles visible from the yard after a wind event. Unilock tiles are heavier than asphalt shingles, but the San Antonio storm season can still lift a broken or poorly fastened piece, especially near eaves and hips.
- Visible cracks running lengthwise down tiles. Hairline cracks widen under thermal expansion; once water enters a crack, the next hard freeze breaks the tile through.
- Loose or shifting tiles when you look at the roof line from the ground. Fasteners can corrode over 15 to 20 years in the San Antonio humidity, and a tile that moves under foot or wind is one storm away from leaving a gap.
See the difference
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After
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AfterReplacement Cost & What’s Included
In San Antonio, expect most Unilock roofing repairs to land between $600 and $2,500 installed. A single cracked tile with no underlying damage sits at the low end: you’re paying for the part, the trip, the labor to lift surrounding tiles, and the time to re-seat everything correctly. A repair that involves damaged underlayment, rotted decking, or multiple tiles along a hip or ridge lands higher, because we’re stripping back to a sound surface before reinstalling anything.
What’s included in our written price: the specific Unilock or equivalent part, all flashing and fasteners, underlayment repair if needed, full cleanup, and the removal of the old material. We hand you a written line-item price before any work starts, and that number does not change unless we open the area and find structural damage no one could see from the outside. If that happens, we stop and show you what we found and get your sign-off before spending another dollar.
DIY or Call Us?
Walking your own roof is where a lot of good weekends go bad. Unilock tile is heavy and brittle, and the same things that make it durable make it unforgiving if you kneel in the wrong spot. A cracked tile is brittle; it will snap under body weight and the sharp edge will find your hand. Roof work on any pitched San Antonio roof carries real fall risk, especially after rain when the surface is slick. We recommend staying on the ground and using binoculars or a camera with zoom to identify the problem area.
What a homeowner can safely do is check from the ground for missing tiles, inspect the gutters for granule buildup, and photograph anything that looks off. Then call us at (254) 269-5071. We’ll come out, get eyes on the actual condition, and give you a written price before anything gets touched.
FAQs
Unilock concrete and composite roofing tiles typically last 30 to 50 years in the San Antonio climate, but the fasteners and underlayment beneath them often need attention at the 15 to 20 year mark. Call (254) 269-5071 and we’ll inspect both layers, not just what’s visible from the ground.
Small hairline cracks can sometimes be sealed with a quality roofing sealant as a stopgap, but any crack that runs full length or lets water through means replacement. Call (254) 269-5071 for an honest assessment, and we’ll tell you if sealing is a real option or a waste of your money.
A single tile swap usually takes under two hours including setup and cleanup, while a multi-tile repair with underlayment work can run half a day. Call (254) 269-5071 and we’ll give you a realistic window based on what you’re seeing.
We keep common Unilock tile profiles, fasteners, and flashing components on our trucks, and for discontinued molds we source through regional suppliers who hold old stock. Call (254) 269-5071 with your part number or a photo, and we’ll confirm availability before you commit to anything.
Know who’s coming, know what it costs, know it’s covered. That’s the whole job before the job starts.
Written by Isaac Pruett, Owner, Mason Remodeling Co San Antonio at Mason Remodeling Co San Antonio, serving San Antonio and nearby areas.
