Unilock Windows & Doors Nationwide

Unilock Windows & Doors: The Redwood City Owner’s Guide

We stock and install Unilock-compatible windows and doors in Redwood City, with most replacement units running $4,500-$15,000 installed depending on the series, opening count, and whether the job includes full-frame replacement or insert retrofit. Most standard-size Unilock vinyl and fiberglass units are available same-week; custom-ordered Unilock aluminum-clad wood series typically arrive in 3-4 weeks. The first sign of failure is usually a draft you can’t locate, followed by fogged glass you can’t wipe clean, or a sash that won’t stay open on its own.

Call (650) 560-7228

Which Unilock Models This Applies To

Unilock’s window and door catalog breaks into three series families, and the part you need depends on which one is on your house. The Unilock 500 Series is the vinyl double-hung and slider line common in Redwood City tract builds from 2005-2015; look for a white or tan embossed label in the head jamb or on the spacer bar between glass panes. The Unilock 700 Series is the fiberglass pultruded line with a darker bronze or forest green label, usually found in custom homes and additions in neighborhoods like Stambaugh-Heller where energy code compliance mattered to the original builder. The Unilock 900 Series is the aluminum-clad wood architectural line; labels are etched into the interior wood frame near the lock mechanism.

For parts matching, the critical number is the NFRC code stamped on the glass spacer, not the model name on the sales sheet. Two 500 Series units can have different sash balances, weatherstrip profiles, or glazing bead dimensions depending on the manufacturing year. We carry OEM Unilock balances, tilt latches, and weatherstrip kits on our Redwood City trucks; for discontinued profiles, we machine-match aftermarket equivalents from AmesburyTruth or Caldwell and document the substitution in writing before ordering. Rowan Construction Group Redwood City is an independent service provider, not affiliated with Unilock.

Signs Your Unilock Windows & Doors Is Failing

• Fogged or hazy glass you can’t wipe clean. This is seal failure in the insulated glass unit (IGU), the space between panes where the desiccant has saturated and moisture has entered. In Redwood City’s marine climate with morning fog rolling off the bay, this happens faster on south and west exposures where daily thermal cycling is most extreme.
• Sash won’t stay open or slams shut unexpectedly. The coil or block-and-tackle balance has lost tension or the balance shoe has cracked. On Unilock 500 Series vinyl units, the balance is concealed in the jamb liner and requires a specific release tool to access without damage.
• Visible daylight or air movement around the frame perimeter. The compression weatherstrip has hardened or the fin seal has torn at the meeting rail. This is common in Redwood City homes within a mile of the salt air corridor, where rubber compounds degrade faster than inland manufacturers test for.
• Lock won’t engage or handle spins freely. The multipoint lock mechanism has a failed cam or the keeper has shifted due to settling. On Unilock 900 Series clad-wood doors, the three-point locking system depends on precise frame-square tolerance; a shifted keeper usually means the frame has racked and needs adjustment, not just a new lock.
• Water staining on the interior sill or drywall below. The sill pan is blocked, the weep holes are clogged with debris, or the end dams have separated. Redwood City’s redwood duff and bay-side pollen are notorious for packing weep channels; we clear and document this on every service call because it’s the failure Grant learned to check first after a callback in 2019.

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Replacement Cost & What’s Included

For Unilock window and door replacement in Redwood City, our installed pricing runs $4,500-$15,000 for full-frame replacement of a typical home’s window package, or $800-$2,800 per opening for insert retrofits where the frame is sound. Single sash or IGU replacement on an otherwise functional unit runs $340-$780 per window depending on glass options (Low-E, argon fill, tempered).

What drives the range: unit size, series tier (vinyl vs. fiberglass vs. clad-wood), glass specification, and whether the opening needs structural repair from prior leaks. Every quote is a flat written price with line-item scope before work starts, per Clause 1 of the Haven Standard. The 365-Day Done Right Promise covers the installation; manufacturer warranty on Unilock units is 20 years on glass, 10 years on non-glass components, transferable once. We pull permits when required by Redwood City’s building division and include the documented photo record as standard.

DIY or Call Us?

There’s a safe middle ground. A homeowner can check weep holes with a pipe cleaner, verify the lock keeper hasn’t loosened, and confirm the sash is fully seated in the track. What we don’t recommend: removing a sash with a failed balance (the counterweight can release suddenly), cutting glass to size (tempered glass cannot be field-cut; annealed replacement in a door or large window violates safety code), or forcing a stuck multipoint lock (the internal cams strip easily and the mechanism is a $180 part, not a $40 one).

We carry Unilock-compatible balances, weatherstrip, and lock components on our Redwood City trucks. If you’re matching a part and unsure of the series year, call us at (650) 560-7228 and we’ll walk through the label location over the phone. If we schedule a visit, the estimate is free and the price is written before any work starts.

FAQs