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Unilock Roofing: The Houston Owner’s Guide
Unilock roofing in Houston typically costs $8,000 to $20,000 for a full replacement, with targeted repairs running $400 to $1,800 depending on the damage. Most Houston homeowners discover a problem the ugly way: a water stain spreading across the ceiling after a heavy storm, granules collecting in the gutters, or a shingle that peeled back during a spring wind event and never got checked.
This page covers exactly what you need to know about Unilock roofing products, how to identify what’s failed, what it costs to fix in the Houston market, and what we keep on the truck to handle it.
Key Takeaways:
- Unilock roofing systems are built for freeze-thaw climates, but Houston heat and humidity stress them differently: sealant breakdown and granule loss happen faster here than in northern markets.
- Bradford Remodeling Co Houston stocks Unilock-compatible roofing materials and installs them with a written price before work starts.
- Every roofing job we complete carries our 365-Day Done Right Promise. If the work fails within a year, we return and correct it at no charge.
Which Unilock Models This Applies To
Unilock’s roofing line covers three main product families: Unilock RoofStone (concrete roof tiles molded to look like natural slate or shake), Unilock RoofPaver (interlocking concrete pavers designed for flat and low-slope roof decks), and Unilock RoofEdge (aluminum and steel perimeter flashing systems that tie the roof into fascia and gutter lines). Each series uses different mounting hardware, and that’s where most compatibility mistakes happen.
The fastest way to identify what you have: check the underside of a lifted tile or the back face of a paver. Unilock stamps a mold code and production date on every unit. If the stamp is worn off, measure the tile’s exposed width. RoofStone runs 12 to 14 inches wide with a 1-inch side interlock; RoofPaver units come in 16-by-16-inch and 24-by-24-inch formats. Write those numbers down before you call anyone. It saves a return trip and a second service fee.
One Unilock-specific gotcha in Houston: early RoofStone molds (pre-2012 production runs) used a narrower drip channel on the underside than current molds. If you patch an old roof with new tiles, water can wick sideways and saturate the underlayment. We flag this on every Unilock repair estimate we write, because most Houston homeowners have never heard it mentioned by another contractor.
On the OEM-versus-aftermarket decision: Unilock still manufactures its current roofing lines, so for tiles and pavers we recommend OEM. The interlock geometry is proprietary, and aftermarket “Unilock-compatible” tiles from generic concrete suppliers often sit 1/8 inch proud at the seams, which creates wind lift. For flashing, fasteners, and underlayment, quality aftermarket equivalents (such as ZAC screws and peal-and-stick synthetic underlayments rated for 180°F surface temps) are actually the better choice in Houston’s climate.
Styles & brands we work with
Signs Your Unilock Roofing Is Failing
- Tile slippage or a visible gap at the seam. The interlock has failed, usually because the mounting clip corroded. Houston’s humidity accelerates galvanic corrosion between aluminum clips and concrete tiles, and once one tile shifts, the row above it loses support.
- Granule loss collecting in your gutters. Concrete tiles shed surface aggregate as they age. A thin dusting is normal. A pile of granules the size of a cereal bowl after one storm means the tile surface is breaking down and water absorption is accelerating.
- Water staining on the ceiling or along exterior soffits. By the time water shows up inside, the underlayment beneath the Unilock tiles has already failed. The tile wasn’t the waterproof layer on most Houston Unilock installs – the underlayment was. The tile is the armor; the membrane is the skin.
- Efflorescence (white chalky residue) on tile faces. This means water is moving through the tile body, not over it. In Houston’s humidity, efflorescence often appears within five to eight years on west-facing roof slopes that get full afternoon sun followed by evening temperature drops.
- Flashing pulling away from chimneys or sidewalls. The thermal expansion cycle in Houston, where a roof surface can swing from 40°F to 160°F in a single year, works sealant joints loose. If you can slide a butter knife behind the flashing, the seal has failed and water is getting in.
See the difference
Before
After
Before
After
Before
AfterReplacement Cost & What’s Included
For Houston homeowners, a full Unilock roof replacement runs $8,000 to $20,000 depending on roof square footage, pitch, and access. Targeted Unilock repairs – replacing three or four slipped tiles, re-securing a row, replacing a section of flashing – run $400 to $1,800. A mid-size paver roof deck replacement typically lands between $3,500 and $11,000, consistent with our paver patio pricing for comparable coverage.
What drives the range:
- Roof pitch and safety access. A 4:12 single-story roof is straightforward. A 8:12 two-story roof needs staging, harness tie-offs, and a safety monitor on site. That’s labor hours, and it’s in the written number up front.
- Underlayment condition. If the existing membrane is saturated or delaminated, replacing tiles alone is throwing money away. We’ll tell you before we start, in writing.
- Tile availability. Unilock still produces current molds, but if you need pre-2012 tiles for a spot repair, we source from reclaimed-lot suppliers, and reclaimed tile runs 10 to 20 percent more than new production.
Every quote includes parts and labor as separate line items, so you see exactly what the materials cost and exactly what the crew costs. No number moves at the door. The Garrison Standard applies to roofing the same way it applies to a full kitchen remodel: written price before any work starts, and the 365-Day Done Right Promise in your hand when we finish.
DIY or Call Us?
For flat RoofPaver decks, homeowners can safely check joint gaps, standing water, and drain blockage. That’s inspection, not repair, and it’s worth doing twice a year. For RoofStone tile roofs, do not get on the ladder. Sloped concrete tile work is genuinely dangerous: a failed interlock can release a tile under your weight, the granules are slippery when damp, and Houston’s morning dew makes an 8 a.m. inspection riskier than a noon one. We keep three of our crew members certified in steep-slope fall protection for exactly this reason.
Where DIY goes wrong: owners caulk a slipped tile back into place and call it fixed. The clip underneath is still corroded, water is still moving under the row, and now the caulk seals moisture in instead of out. Six months later the underlayment is shot. Straight scope, straight number – that’s the whole conversation. If you see a slipped tile, call (940) 289-7658 and let us look at it before you spend money on a cosmetic fix.
FAQs
Unilock RoofStone and RoofPaver products are engineered for 40 to 50 years of service life in northern climates, but in Houston’s heat and humidity, the realistic lifespan is 25 to 35 years for tiles and 15 to 20 years for the underlayment beneath them. The tiles may look sound; the membrane underneath rarely is. Call (940) 289-7658 for an inspection that tells you which one you’re actually dealing with.
Yes, in most cases. If the damage is limited to a few tiles, a single row, or a section of flashing, a targeted repair runs $400 to $1,800 and extends the roof’s life by years. Repairs stop making sense when the underlayment has failed across multiple slopes or the tile interlock pattern is broken in more than 20 percent of the field. Call (940) 289-7658 and we’ll inspect and give you the repair-versus-replace number in writing, no pressure.
A typical Houston single-family Unilock roof replacement takes 3 to 7 working days from tear-off to final inspection. Paver roof decks run 2 to 4 days. Weather matters: Houston storms can push a schedule, and we do not rush a roof to hit a calendar date. We’ll put the schedule in your written estimate.
We keep current-production Unilock RoofStone tiles, RoofPaver units, mounting clips, ZAC fasteners, and synthetic underlayment on our trucks for same-visit repairs when the mold code matches. If you have a pre-2012 mold code or a RoofEdge flashing profile we don’t carry, we order it same day and schedule the repair within the week. Bradford Remodeling Co Houston is an independent service provider, not affiliated with Unilock. We also stock parts for KraftMaid, Cambria, and Silestone, so a roofing visitor with a kitchen issue is in the right place too. Call (940) 289-7658 and tell us the stamp code on your tile; we’ll tell you over the phone whether we can fix it the same day.
Written by Curtis Lane, Owner, Bradford Remodeling Co Houston at Bradford Remodeling Co Houston, serving Houston and nearby areas.
