CGI Window Replacement Nationwide | Sightline Windows & Doors Lighthouse Point

CGI Window Replacement: The Lighthouse Point Owner’s Guide

CGI window replacement in Lighthouse Point typically runs $340 to $890 per opening for standard vinyl or aluminum units, depending on the series, glazing package, and whether the original frame is preserved or replaced. We stock CGI-compatible sashes, balances, and hardware for same-day repair on most common failures, and we carry full replacement units for the Sentinel, WinGuard, and Architectural series in our Lighthouse Point warehouse. Most homeowners discover a CGI window is failing when the sash won’t stay open, the lock no longer seats flush, or they notice daylight between the frame and the sash after a storm - signs that the balance system, weatherstripping, or frame seal has reached end of life in South Florida’s salt air and UV exposure.

Call (754) 600-8907

Which CGI Models This Applies To

CGI windows in Lighthouse Point homes fall into three main series, and the replacement approach differs for each. The Sentinel line - the builder-grade vinyl single-hung and horizontal roller most common in homes built 2015 to 2022 - uses a proprietary balance shoe and tilt-latch geometry that changed in 2019. Pre-2019 Sentinel balances are not interchangeable with post-2019 units; the shoe width shifted from 5/8 inch to 3/4 inch, and the pivot bar angle changed. We verify this on site with a caliper, not by eye.

The WinGuard aluminum impact-rated series, found in nearly every canal-front home near the Lighthouse Point Marina, uses laminated glass packages that must match the original design pressure rating stamped on the glass itself. That stamp is usually in the lower corner of the fixed panel or on the spacer bar between panes. We photograph it before ordering. The Architectural line - custom geometric and fixed picture windows - requires field-verified rough opening measurements to 1/16 inch because CGI builds these to order with no standard catalog sizes.

For parts replacement, we source OEM CGI balances, locks, and weatherstripping through our distributor in Pompano Beach. For full unit replacement, we also specify quality aftermarket equivalents from CWS or ES Windows when the opening’s performance requirements allow it and the homeowner prefers a different price tier. Sightline Windows & Doors Lighthouse Point is an independent service provider, not affiliated with CGI. We specify by what the opening requires, not by what is in stock.

Signs Your CGI Window Replacement Is Failing

• The sash drops or won’t stay open. This is the spiral balance failing, usually from corrosion in the tube. In Lighthouse Point, we see this at 8 to 12 years on coastal exposures, faster than the 15-year rating because salt air penetrates the balance tube through the bottom bracket.
• The lock tongue won’t engage or sits proud of the keeper. The sash has sagged or the frame has settled. On vinyl CGI units, the interlock rail flexes over time; on aluminum WinGuard units, the keeper screws back out of the reinforced frame. Either way, forcing the lock stresses the hardware and cracks the rail.
• Visible daylight or water staining at the sill. The weatherstripping pile or fin seal has compressed or torn. On horizontal rollers, the sill track weep holes clog with sand and salt, trapping water that degrades the seal from below.
• Fog between the glass panes. The insulating glass unit seal has failed. In impact-rated CGI windows, this means the laminated inner lite and the tempered outer lite are still intact for safety, but the airspace is no longer sealed and the Low-E coating is degrading from moisture exposure.
• The crank handle spins without moving the sash on casement or awning units. The operator gears have stripped, usually from over-torquing when the hinge arm is corroded. CGI’s older awning operators used a zinc alloy gear housing that cracks under load; current units use cast aluminum.

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Replacement Cost & What’s Included

What moves the price: frame condition (wood rot in the rough opening adds $200 to $400), stucco or drywall repair scope, and whether the original installation used CGI’s nailing fin or a block frame retrofit. We measure everything on the first visit, write the scope, and the price on that document is the price on the invoice. No change orders. Haven Clause 1.

Every replacement carries the 365-Day Done Right Promise written into the Haven Standard. If the sash doesn’t seat, the lock doesn’t catch, or the weep system drains slow, we return and correct it. The documentation you keep includes the measured survey, the written scope, the photo record of the completed work, and the warranty terms.

DIY or Call Us?

A homeowner can safely check three things: whether the weep holes are clear (a paper clip, not a drill bit), whether the lock keeper screws are tight, and whether the sash tilt latches engage fully. These take five minutes and require no tools beyond a screwdriver.

What goes wrong in DIY: removing a CGI sash without supporting the balance tube releases spring tension suddenly and can damage the jamb liner. On WinGuard impact units, the laminated glass weighs 4 to 6 pounds per square foot - a 36-by-72 picture unit can exceed 75 pounds, and the wrong lift technique cracks the corner gusset or tears the frame seal. We have replaced units where the homeowner’s helper dropped the sash on the tile and spidered the glass, turning a $280 balance job into a $1,400 full-unit replacement.

We don’t charge to look. Call (754) 600-8907 and we’ll schedule a measured survey. You’ll get the written price before any work starts, and the photo record when it’s done. Measure twice, write it down, then we talk price.

FAQs