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Unilock Fence Installation: The San Antonio Owner’s Guide
Unilock fence installation in San Antonio typically runs $3,500 to $9,000 for a complete post-and-panel system, and yes, we stock the most commonly needed Unilock-compatible hardware on our trucks. If you’ve got a section of fence leaning after the last Hill Country windstorm, a post that’s shifted off its concrete footing, or panels that have popped loose at the mounting brackets, you’re looking at the page that tells you exactly what happens next. Most owners discover the problem the hard way: a gate that suddenly drags, a line of panels tilting toward the neighbor’s side, or a post that wobbles when you push on it.
We’ve handled Unilock fence work across San Antonio for years, from Alamo Heights to Stone Oak to the newer subdivisions out toward Helotes. The failure patterns are consistent, and so is the fix. Isaac Pruett and his crew have replaced enough failed posts and cracked panels here to know which corners get cut during the original install and which parts of the Unilock system hold up fine in our clay-heavy soil and 100-degree summers. We’ll walk you through it below, with real numbers, so you can decide whether to call us or handle it yourself.
Which Unilock Models This Applies To
Most of the fence calls we run in San Antonio involve Unilock’s Estate Wall and Terrace Wall systems used as structural fence bases or planter-backed privacy screens, plus their coordinating post caps, coping units, and panel brackets. Unilock manufactures each part with a specific series code stamped into the back or underside of the unit, usually a three or four character marking like “EW-204” or “TW-115.” That code matters more than the color name, because Unilock produces the same visual style in different dimensional ratios depending on the region it ships to. A post manufactured for the Midwest market will not necessarily seat correctly with Texas-sourced panels, even if the color looks identical.
Here’s the compatibility gotcha we see most often: Unilock discontinued several Texas-region post sizes around 2018, and the current equivalent is a quarter-inch taller with a revised anchor channel. If you try to match one new post into a run of older ones, you’ll get a visible height step at the top rail. We keep a reference chart on the truck for matching discontinued Unilock dimensions to current production units, because guessing at the supply yard is how homeowners end up with a fence line that looks like a sawtooth. On the OEM question: for Unilock fence installation specifically, we use genuine Unilock units when they’re available, and quality aftermarket equivalents only for structural components the owner will never see, like buried anchor brackets and internal post cores. The visible face units need to match exactly or the whole run looks wrong.
Styles & brands we work with
Signs Your Unilock Fence Installation Is Failing
These are the five symptoms we walk into most often when a San Antonio homeowner calls about a Unilock fence that’s started to misbehave:
- Post lean of more than two degrees off vertical. In our clay soil, which shrinks hard during droughts and swells after rain, even a properly set post will move a little over a decade. When you can see the lean from the street, the concrete footing has cracked or the base course has shifted, and no amount of pushing will fix it.
- Panels riding up at the corners. Unilock fence panels rest in a channel that leaves a designed gap. If one corner rides higher than the other, the channel is packed with soil or the panel has cracked at the seat. Left alone, that panel will bind and chip.
- White, chalky residue on the face. This is efflorescence, and it shows up on San Antonio fences where sprinkler overspray hits the same course year-round. It’s not structural, but it tells you water is moving through the block in a way the original install didn’t anticipate.
- Gate latch no longer lines up. The post holding the gate has migrated, usually because the gate post was set shallower than the line posts. We see this constantly on 6-foot privacy gates where the original installer cut corners below grade.
- Hairline cracks running vertically through the middle of a panel. This is a freeze-thaw or thermal expansion crack. Our winter temperature swings, while mild compared to the Midwest, are enough to split a panel that was installed too tight with no expansion allowance.
See the difference
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AfterReplacement Cost & What’s Included
In San Antonio, expect to pay between $3,500 and $9,000 for a complete Unilock fence installation, depending on linear footage, height, whether you’re reusing the existing concrete footing, and how much of the run needs to be dug out and reset. A partial repair, say two or three posts and a dozen panels, will land lower than that range. A full teardown of a failed run with new footings, new base course, and new panels all the way through will land at the top.
Every quote we write includes the parts separated from the labor, so you can see exactly what each line costs. Unilock units themselves are the bulk of the material expense, and they’ve gone up roughly 8% in the last two years. The labor covers removal of the failed section, footing excavation to 18 inches in San Antonio’s frost zone, gravel base, proper drainage behind the wall if we’re in a retaining application, and resetting each course with a level check. You get the written price before we start, no change orders unless you specifically ask for extra scope. The 365-Day Done Right Promise covers the fence work: if something’s not right within a year of completion, we come back and fix it at no cost to you.
DIY or Call Us?
Unilock fence installation is not a high-tension, dangerous-to-DIY job the way garage springs are, so we’ll be honest about what a handy owner can handle. You can reset a single leaning panel, clear packed channels, and fix a gate latch alignment with basic tools and an afternoon. Where DIY goes wrong is when the post footing is involved. A post that’s leaning because the concrete failed needs to be excavated, the old footing broken out, and a new one poured and cured to the right depth. If you get that wrong, you’re doing the whole job again in three years, and now the adjacent panels have cracked from being moved twice.
If the issue is below grade, or if more than two posts are involved, call us at (254) 269-5071 and we’ll send someone to look at it. The estimate visit is free, and you’ll know the price before you decide anything.
FAQs
A properly installed Unilock fence run in San Antonio lasts 20 to 30 years before the base course needs attention, but the panel faces and posts will stay serviceable that whole time if the drainage was done right. The main lifespan killer here is sprinkler overspray against the face, which causes the efflorescence and surface wear we see on older installs around Alamo Heights and Terrell Hills.
A cracked panel can sometimes be stabilized with a color-matched epoxy if the crack is narrow and the piece isn’t load-bearing, but on a fence line the panel is the structure, so we usually recommend replacing the unit. Unilock panels in a run share load with their neighbors, and a repaired panel passes that stress sideways into the adjacent units. Call us at (254) 269-5071 for an exact read on your situation.
A typical three-post, 40-panel Unilock fence repair takes two to three days in San Antonio weather, including footing removal, cure time for the new concrete, and resetting the units. If we’re doing a full replacement of a long run, plan for a week. We stage materials in your driveway the day before and keep the work area clean at the end of each day.
We stock the most common Unilock post sizes, panel units, and anchor hardware on our trucks, which covers about 80% of the fence repairs we handle in San Antonio. Discontinued sizes or uncommon colors we source through our supplier network, usually within three to five business days. You’ll know at the estimate visit if anything needs to be ordered.
Written by Isaac Pruett, Owner, Mason Remodeling Co San Antonio at Mason Remodeling Co San Antonio, serving San Antonio and nearby areas.
