Unilock Fence Installation: The South Florida Owner’s Guide
Unilock fence installation in South Florida typically runs $3,500-$9,000 for a complete vinyl or aluminum system, depending on linear footage, terrain, and whether we’re anchoring into coral rock or standard soil. Most Unilock fence projects we take on in Broward and Miami-Dade counties are quoted and started within a week, with material orders placed direct through Unilock’s regional distribution out of Fort Lauderdale. Homeowners usually realize something’s wrong when posts lean after a tropical storm, pickets warp from UV exposure, or the gate latch quits catching - often after a few seasons of South Florida sun and salt air have done their work.
Which Unilock Models This Applies To
Unilock’s fence line breaks into two main families for our market: the U-Grip vinyl systems (white, tan, and clay colorways) and the aluminum Estate series with powder-coated finishes. The vinyl posts come in 5-inch and 6-inch widths, with wall thicknesses that matter more than most homeowners realize - the 0.135-inch wall handles our wind-load codes in Miami-Dade better than the thinner 0.100-inch spec you’ll find in big-box equivalents. Aluminum rail sections run 6-foot standard, though we’ve custom-ordered 8-foot runs for waterfront properties in Hollywood and Hallandale Beach where the span needs to clear bulkheads without extra posts.
Every Unilock post base has a stamped date code and series mark on the interior wall, visible if you pop the cap. That’s how we verify whether we’re matching U-Grip Original or U-Grip Pro - the rail brackets changed between generations, and mixing them cracks the locking tabs. We source factory-direct Unilock components rather than generic vinyl or aluminum stock because the rail-to-post connection geometry is proprietary. Generic “fits most” brackets we’ve tested from regional suppliers don’t seat flush, which leaves a stress point that fails at the worst time, usually when a named storm’s rolling up the coast.
Signs Your Unilock Fence Installation Is Failing
- Posts lean or wobble at the base. In South Florida, this usually means the concrete footing has cracked against coral rock or the post itself has rotted at the ground line if water pools against it during our summer deluges. We see this most in older Pembroke Pines installations where yard grading settled after construction.
- Gate drags or won’t latch. The aluminum frame has twisted slightly, or the hinge bolts have wallowed out their holes from repeated wind load. Unilock’s adjustable hinge set can compensate for minor shifts, but once the post itself leans, the gate geometry is shot.
- Rail sections bow between posts. Vinyl expands more than most homeowners expect - roughly 1/8 inch per 10 feet in 100-degree heat. If the installer didn’t leave expansion gaps at the brackets, the rail buckles outward. We’ve fixed this exact issue in Weston homes where the original contractor treated it like wood fencing.
- Picket tops discolor or become brittle. South Florida UV hits harder than Unilock’s Midwest test data accounts for. The capstock on older U-Grip Original can chalk after 8-10 years; the Pro series with enhanced TiO2 holds color longer, but nothing lasts forever at this latitude.
- Concrete footings heave or crack. Our limestone substrate shifts with wet-dry cycles, and poor drainage accelerates the problem. In Coral Springs and Parkland, we’ve pulled posts where the footing was poured too shallow or without rebar, letting the whole assembly tilt after one heavy rainy season.
Replacement Cost & What’s Included
A full Unilock fence replacement in South Florida falls between $3,500 and $9,000 installed. The low end covers roughly 100 linear feet of 4-foot vinyl U-Grip in flat terrain with good access; the high end gets you 200+ linear feet of 6-foot aluminum Estate with automatic gate hardware, excavation through rock, and permits for a corner lot in a wind-borne debris region.
What drives the spread: soil conditions (coral rock requires pneumatic tools and longer concrete cure times), linear footage obviously, height (4-foot pool code vs. 6-foot privacy), and whether we’re matching existing hardscape that butts against the fence line. Every quote we write breaks out material, labor, and permit costs separately. You choose the Unilock grade and color; we handle the build. No proprietary lock-in, no surprise line items.
We are an independent contractor and are not affiliated with Unilock. We source their products through authorized regional distribution and stand behind our installation workmanship.
DIY or Call Us?
There’s honest work a handy homeowner can do: pop post caps to check for model marks, verify gate hardware tightness with a socket set, and clear drainage paths so water doesn’t pool at footing lines. What we don’t recommend is setting posts yourself or attempting to reset a leaning section. Fence posts in South Florida need footings at 24-30 inches minimum, below our frost line isn’t the issue - it’s the wind-load requirement. Miami-Dade and Broward both enforce ASTM F567 for vinyl and aluminum fencing, and a post that isn’t plumb, properly anchored, and correctly spaced will fail inspection or fail outright in a tropical storm.
We’ve been called in after DIY installs in Miramar where the homeowner used quick-set concrete in a dry hole, skipped the gravel drainage base, and watched the post tilt six months later. Do it right the first time or you’ll do it twice - and the second time always costs more. For a straight assessment of whether your Unilock fence needs spot repair or full replacement, call us at (844) 665-0162. Estimates are free, and we’ll walk the line with you.
FAQs
Expect 15-20 years for vinyl U-Grip Pro and 20-25 years for aluminum Estate if installed correctly with proper drainage and periodic hardware checks. The UV and salt air here accelerate surface aging compared to Unilock’s inland warranty benchmarks, so we spec the Pro series or aluminum for any property within two miles of the coast. Call (844) 665-0162 if you’re unsure which generation you have - we can tell from a photo.
Spot repair works if the failure is isolated: one rotted post, a single bowed rail, or gate hardware replacement. Once multiple posts lean or the rail system has widespread UV degradation, replacement is more cost-effective than chasing individual failures. We don’t sell repairs that won’t last - if we wouldn’t do it at our own property, we won’t quote it at yours. Call for an honest assessment.
Most residential projects run 2-4 days from excavation to final walkthrough, assuming standard soil and no permit delays. Coral rock, HOA approval holdups, or custom gate fabrication can stretch that to a week. We coordinate material delivery so your yard isn’t a staging area any longer than necessary - one of the benefits of working with a single-source contractor who handles ordering direct.
We don’t carry full fence inventory on the truck - Unilock’s color and height range is too broad for that - but we stock common repair hardware, post caps, and rail brackets for U-Grip and Estate series. For full replacement, we order factory-direct with typical 5-7 day lead time from Fort Lauderdale distribution. If you need emergency stabilization after storm damage, we can temp-bracket with what we carry while your order comes in.
Written by Raymond Estevez, Owner & General Contractor, Groundwork Construction Co. of South Florida at Groundwork Construction Co. of South Florida, serving South Florida and nearby areas.