Unilock Windows & Doors Nationwide

Unilock Windows & Doors: The Pasadena Owner’s Guide

Unilock window and door replacement in Pasadena typically runs $4,500-$15,000 for full window replacement and $8,000-$25,000 for impact-rated installations, with most part-specific repairs landing between $400 and $1,800. We stock Unilock-compatible hardware, seals, and sash components on our Pasadena service trucks, and we can usually source exact-match Unilock parts within 24 hours for anything we don’t carry. Most homeowners realize something’s wrong when the window won’t stay open on its own, or when they feel a draft along the sill despite the latch being fully engaged.

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Which Unilock Models This Applies To

Unilock manufactures several window and door series, and the part you need depends on when your unit was installed. The most common lines we see in Pasadena homes are the Unilock 5000 Series vinyl windows (manufactured 2008-2018), the Unilock 7000 Series aluminum-clad wood windows (2012-present), and the Unilock Patio Door Systems (sliding and French configurations across both series). The model number is stamped on a metal label in the head jamb or along the hinge side of the frame; you’ll also find a date code that matters because Unilock changed its roller and lock mechanisms in 2016, and pre-2016 hardware is not backward-compatible with post-2016 frames.

For the 5000 Series, the critical spec is the sash weight rating, stamped in pounds on the balance shoe visible when you tilt the sash inward. The 7000 Series uses a proprietary mortise lock with a 7/8-inch backset that standard aftermarket locks do not match; we’ve seen homeowners buy generic Baldwin or Schlage replacements and discover the strike plate holes don’t align by a quarter inch. We source OEM Unilock parts through our distributor in City of Industry, and when OEM is back-ordered, we use Truth Hardware or AmesburyTruth equivalents that we’ve verified for fit and cycle life. The decision between OEM and aftermarket comes down to how long you plan to keep the window: OEM for a home you’re staying in, quality aftermarket for a rental or near-term sale.

Signs Your Unilock Windows & Doors Is Failing

• Sash won’t stay open or slams shut. The coil balance or block-and-tackle system has lost tension. In Pasadena’s dry heat, the lubricant hardens and the spring fatigues faster than the manufacturer rates for; we see this most often in south-facing windows above 10 years old.
• Visible moisture between panes. The insulated glass unit (IGU) seal has failed, allowing argon gas to escape and ambient air to enter. Once you see fogging, the thermal performance is gone; the IGU must be replaced, not the whole sash.
• Draft at the meeting rail or sill even when locked. The weatherstrip has compressed or the interlock has worn. Unilock uses a dual-fin weatherstrip on the 7000 Series that flattens over time; replacement requires removing the sash to access the kerf slot.
• Lock lever turns but doesn’t engage the keeper. The mortise lock mechanism has worn cam teeth or the spindle has slipped. This is a security issue, not just a convenience problem; a window that appears locked but isn’t is an easy entry point.
• Sliding door requires two hands to move or grinds in the track. The tandem roller assembly has flat-spotted or the axle has corroded. Pasadena’s Santa Ana wind cycles blow fine dust into the track, accelerating wear; we replace with stainless-steel axle rollers rated for coastal exposure.

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Replacement Cost & What’s Included

For Unilock part-specific repairs in Pasadena, most jobs fall between $400 and $1,800 installed. A coil balance replacement on a single-hung 5000 Series window runs $180-$340 per sash. An IGU replacement with tempered glass runs $350-$650 per unit depending on size and low-E coating. A full mortise lock and keeper set for the 7000 Series runs $220-$380. Sliding door roller replacement runs $280-$520 depending on whether we need to remove the fixed panel to access the rollers.

What drives the range: accessibility (second-story vs. ground floor), glass type (tempered, laminated, or impact-rated), and whether the frame substrate is damaged. Every quote we write separates parts, labor, and any necessary permit or disposal fees. Under Clause 1 of the Haven Standard, that written price is the price; no change proceeds without a signed change order. Our workmanship on window and door repairs carries a 365-Day Done Right Promise, and the documented photo record from your visit is emailed to you before we leave the driveway.

DIY or Call Us?

There’s a safe middle ground here. A homeowner can check the model label, photograph the failed component, and confirm the symptom (does the lock cam actually rotate, or does the handle spin freely?). What we don’t recommend: removing a fixed sash without knowing the tilt-latch release sequence, or attempting to reset a coil balance without a winding tool. The spring tension in a block-and-tackle balance can release suddenly; we’ve seen lacerations and broken glass from DIY attempts. If your Unilock unit is on a second story or above a hard surface, the fall risk adds to the equation. We’re not here to talk you out of trying; we’re here to tell you where the job turns from inconvenient to hazardous. Call (562) 203-4508 and we’ll walk through what you’re seeing. If it makes sense for you to handle it, we’ll say so.

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