Unilock Windows & Doors Nationwide

Unilock Windows & Doors: The Los Angeles Owner’s Guide

We stock and install Unilock-compatible replacement windows and doors across Los Angeles, with typical installed pricing from $5,310 to $17,700 depending on size, series, and wall condition. Most standard-size Unilock units are available same-week, and we carry common hardware and weatherstripping on our trucks for faster turnaround. Homeowners usually discover a problem when the sash won’t stay open, they feel a draft along the frame, or the multipoint lock won’t engage evenly - signs that the balance system, compression seal, or locking mechanism has worn past adjustment.

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Which Unilock Models This Applies To

Unilock window and door systems are built in several series that differ in frame depth, glazing pocket, and hardware mounting pattern. The most common we see in Los Angeles homes are the 400 Series tilt-wash double-hung, the 600 Series casement with crank-out operator, and the 800 Series sliding patio door with tandem roller carriage. The series number is stamped on the spacer bar between the glass panes or on a label inside the head jamb, visible when you open the sash.

Parts are not cross-compatible between series. A 400 Series balance shoe will not seat in a 600 Series jamb liner, and the patio door tandem rollers for the 800 Series use a 1-1/4 inch axle spacing that differs from the 1-1/2 inch used by competing brands. We source OEM Unilock hardware through our distributor in Commerce, and we also stock quality aftermarket equivalents from Truth Hardware and AmesburyTruth for faster turnaround on balances, operators, and sweep locks. The aftermarket parts meet the same cycle-testing standards, but we always confirm the exact series and manufacture date before ordering - Unilock revised its mortise lock body design in 2019, and the new version uses a 7/16 inch backset where the pre-2019 units used 3/8 inch. That quarter-inch difference means the face plate won’t seat flush if you guess wrong.

Signs Your Unilock Windows & Doors Is Failing

• Sash drops or won’t stay open. The coil balance system inside the jamb liner has lost tension or the balance shoe has cracked. In Los Angeles, we see this accelerated by the dry heat cycles of the San Fernando Valley, where aluminum balance springs fatigue faster than in coastal zones.
• Draft felt along the frame or sill. The compression weatherstrip has hardened or the bulb seal has pulled away from its kerf slot. On south- and west-facing elevations in Los Angeles, UV exposure typically degrades silicone-foam seals in 8 to 12 years.
• Condensation between glass panes. The insulated glass unit (IGU) has lost its hermetic seal and argon fill. This is not repairable - the IGU must be measured, ordered, and replaced as a sealed assembly.
• Crank handle spins without moving the sash. The casement operator gear mechanism has stripped, usually from over-torquing or from operating a sash that has settled out of square in its frame.
• Multipoint lock won’t engage or requires excessive force. The locking points have shifted due to frame settling, or the central gearbox has worn. In older Los Angeles homes with raised foundation movement, we check for frame racking before replacing hardware.

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Replacement Cost & What’s Included

For Unilock window and door replacement in Los Angeles, our installed pricing runs from $5,310 to $17,700 per opening, with most homeowners landing in the $7,500 to $12,000 range for a standard-size unit with standard trim and interior finish. The low end covers a direct replacement of a single hung or slider into an existing opening with intact framing, siding, and interior drywall. The high end reflects larger openings, structural header modifications, stucco or siding repair, and finish carpentry to match existing trim profiles.

Every quote we write itemizes the unit cost, labor, disposal, and any wall repair separately. Under Clause 1 of the Haven Standard, that written price is fixed - no change proceeds without a signed change order, which is how we’ve kept projects within a few percent of the agreed number across 4,000-plus jobs since 2007. The installed work carries our 365-Day Done Right Promise, and the Unilock unit itself is covered by the manufacturer’s limited lifetime warranty on vinyl components and 20-year glass coverage.

DIY or Call Us?

There’s a safe middle ground for homeowners who want to diagnose before calling. You can confirm the series from the label, check the weatherstrip for visible cracking, and test whether the sash operates smoothly without binding. What we don’t recommend: removing a casement operator under spring tension, cutting stucco to access a nail fin, or attempting to reglaze an IGU yourself. The operator arm stores significant energy and can snap closed on fingers; stucco cutting without dust control and proper flashing integration invites moisture intrusion that won’t show until the framing is damaged.

We carry common Unilock balances, sweep locks, and patio door rollers on our trucks, and our crews are background-checked and uniformed. Every visit includes a documented photo record of what we find and what we do, included as standard. If it’s not written down, it didn’t happen. Call (213) 652-7670 to schedule your free estimate.

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