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Unilock Windows & Doors: The Jacksonville Owner’s Guide
We stock and install Unilock-compatible windows and doors throughout Jacksonville, with most window replacement projects running between $4,500 and $15,000 for a full-home scope and door swaps typically falling in the $800 to $3,000 range depending on size and hardware. If your Unilock window won’t lock, the sash won’t stay up, or the door panel has started binding in the frame, you’re looking at a hardware or weatherstripping failure, not necessarily a full replacement. Most Jacksonville owners first notice the problem the morning after a hard rain, when water pools on the sill or the room won’t hold temperature anymore.
Unilock builds windows and doors with a multi-point locking system that depends on precise alignment between the sash, the frame, and the striker plates. When any one of those components drifts out of tolerance, the entire lock mechanism fights itself. That’s the part most people miss. In Jacksonville’s humidity and salt air, the real culprit is often rot in the substrate or corrosion on the hardware tracks, not the Unilock component itself.
Which Unilock Models This Applies To
Unilock’s product line spans several series, and the part you need depends on which one is in your home. The main lines we see across Jacksonville are the tilt-turn windows, sliding patio doors, and the hinged entry door system that uses a European-style multi-point lock rather than a standard deadbolt. Each series has its own hardware geometry. A striker plate from a tilt-turn will not seat correctly on a slider, even if it looks close at a glance.
To identify your part, open the door or window and look for the manufacturer label on the edge of the sash or the inside of the frame jamb. It will list the series name and usually a production date code. If the label is faded or painted over, measure the lock body center-to-center on the mounting holes and the backset, then note whether the handle is right-hand or left-hand operation. Those three measurements get you 90% of the way to the right part. For Unilock specifically, we generally recommend OEM hardware when it is available because the tolerances on the multi-point gearbox are tight enough that aftermarket components often bind within a season. The exception is weatherstripping and gaskets, where quality aftermarket materials actually outperform the originals in Florida sun exposure.
One compatibility gotcha worth knowing: Unilock’s newer series uses a 16mm gearbox centerline, while the older generation runs 15mm. They are not interchangeable. Jacksonville homes built in the 2010s and later are usually on the 16mm spec. If you install a 15mm gearbox in a 16mm door, the handle will feel stiff on day one and the lock points will fail to fully throw within a month.
Styles & brands we work with
Signs Your Unilock Windows & Doors Is Failing
- Handle lifts and turns freely but the lock points do not engage. The gearbox inside the lock body has stripped. This is the single most common Unilock failure we see in Jacksonville, usually after years of users forcing the handle against a misaligned striker.
- Window won’t stay open or closes with a hard drop. The tilt-turn balance mechanism, which is a spring-loaded cartridge inside the frame, has lost tension. Common in coastal air, where the internal spring corrodes faster than inland homes.
- Door panel scrapes the threshold or shows daylight at the corner. The hinge or roller assembly has sagged. On Unilock hinged doors, the lower hinge carries more weight than it should when the upper hinge works loose, and that torques the entire panel.
- Condensation or fog between glass panes. The insulated glazing unit seal has failed. In Jacksonville, this shows up most often on west-facing doors and windows, where afternoon sun and then rapid cooling creates constant thermal cycling.
- Lock engages only when the handle is pushed or leaned on. The striker plates have drifted out of alignment, usually because the door panel sagged or the wall framing shifted. Forcing it works for a while, then the gearbox fails and you’re replacing the whole lock body.
Replacement Cost & What’s Included
We write Jacksonville prices in a straight line so you know what you’re signing. For Unilock hardware replacement, the installed cost typically runs $200 to $600 for a gearbox and striker set on a hinged door. Sliding patio door roller and track replacements land between $250 and $700. If the issue is a failed insulated glass unit, expect $350 to $950 per sash depending on size and glass package. Full window replacement in Jacksonville runs $4,500 to $15,000 for a complete home, and full door replacement runs $800 to $3,000 per unit when the frame itself is too far gone for a hardware swap.
Every price we give is written before the first tool comes out. No numbers that move at the door. The price includes parts, labor, disposal of the old components, and a written scope of work so you can see exactly what we are doing and what it costs. All work is covered by our 365-Day Done Right Promise. If anything fails inside that year, we come back and correct it at no charge. That is the Garrison Standard, and it applies to a door gearbox the same way it applies to a full kitchen remodel.
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AfterDIY or Call Us?
There are things an owner can check without risk. You can confirm whether the handle is loose, whether the striker plate has visible wear marks, and whether the panel is level using a bubble level. Those checks help us diagnose the issue over the phone. What you should not attempt is removing the lock body or gearbox from a Unilock multi-point door. The internal mechanism sits under tension against the lock rods, and if it releases wrong, the lock rods jam inside the door panel. At that point, the door is unusable and the repair cost doubles because we’re now extracting broken hardware rather than swapping a functioning unit. Windows with tilt-turn hardware and spring balances carry the same risk. The spring cartridge stores enough energy to cause hand injury if it releases while you’re working on it.
If the part is visibly loose and accessible, tightening screws is fine. If the part is inside the door slab or window frame and the failure is mechanical, call us at (904) 337-5929. We’ll tell you over the phone whether it’s a truck-stock part and what the likely installed price is before we ever schedule a visit.
FAQs
A properly installed Unilock window or door in Jacksonville should last 15 to 25 years on the frame, with hardware components like gearboxes and rollers expected to last 8 to 12 years before needing replacement depending on exposure and use. Coastal salt air shortens that to the low end of the range. Call (904) 337-5929 and we’ll walk through what you’re seeing before you spend anything.
Most Unilock hardware can be replaced as a component, meaning you do not need a new door or window just because the gearbox stripped or the roller froze. The threshold where repair stops making sense is when the frame or sash itself shows rot or cracking. Call (904) 337-5929 for an honest take on which side of that line your unit falls on.
A standard gearbox or striker replacement on a hinged door takes about one to two hours on site. A roller and track replacement on a sliding patio door takes two to three hours including cleaning and re-leveling the panel. Insulated glass replacement is usually three to five days because the unit is ordered to size. Call (904) 337-5929 for a time estimate based on your specific model.
We keep common Unilock gearboxes, striker plates, rollers, and weather seals on our service vehicles for both the 15mm and 16mm generations. Glass units and full replacement windows or doors are ordered by size and typically arrive within five to ten business days in Jacksonville. Call (904) 337-5929 and we’ll confirm whether your part is on the shelf or needs an order.
Contact Bradford Remodeling Co Jacksonville
If your Unilock windows or doors are failing, do not wait for the next rain or the next forced handle. Curtis Lane and our Jacksonville crews have worked with Unilock hardware across the Southeast for years, and we stock the parts that actually fail in this climate. Brad Remodeling Co Jacksonville is an independent service provider, not affiliated with Unilock, and we also carry compatible components for KraftMaid cabinetry, Cambria and Silestone countertops, and other systems we install. Call (904) 337-5929 for a free estimate, written and honest, before the first tool comes out.
Written by Curtis Lane, Owner, Bradford Remodeling Co Jacksonville at Bradford Remodeling Co Jacksonville, serving Jacksonville and nearby areas.
