CGI Window Replacement Nationwide | Sightline Windows & Doors North Palm Beach

CGI Window Replacement: The North Palm Beach Owner’s Guide

CGI window replacement in North Palm Beach typically runs $340-$890 per opening installed, depending on whether we’re matching a standard Series 375 single-hung or a custom-impact Series 550 fixed unit. We stock common CGI sash, frame, and hardware assemblies on our North Palm Beach trucks, and most replacements measure, quote, and finish within a single visit. Most homeowners discover the problem when the bottom sash won’t stay open, they feel salt-air draft around the meeting rail, or they spot corrosion blooming where the weep channels drain toward the stucco - usually after a storm season when the aluminum frame has taken its third or fourth thermal cycle of the year.

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Which CGI Models This Applies To

CGI manufactures four residential lines you’ll find across North Palm Beach: the Series 375 (non-impact, single-hung and horizontal roller), Series 401 (impact-rated single-hung), Series 550 (impact fixed and casement), and the Estate Collection (aluminum-clad wood, mostly in waterfront custom builds from 2015-2020). Each series uses proprietary frame depths and glazing stops, so a Series 401 sash will not seat in a Series 375 frame even when the rough opening matches.

We identify the correct replacement three ways: the etched CGI logo and series stamp on the glass corner (visible when you open the sash), the frame depth measured from interior to exterior stop (375 is 2⅜ inches, 401 is 2¾ inches, 550 varies by impact rating), and the balance shoe color code on single-hung units - black for standard weight, red for heavy glass. OEM CGI parts ship from their Hialeah distribution center in 3-5 business days; we also stock quality aftermarket extrusions and hardware from C.R. Laurence that match CGI tolerances when the lead time matters and the application allows. For impact-rated units, we specify OEM glass and glazing tape to maintain the NOA (Notice of Acceptance) certification - mixing aftermarket glazing in a Miami-Dade-rated assembly voids the protection you paid for.

Signs Your CGI Window Replacement Is Failing

• Sash drops or won’t stay raised. The coil balance system inside the jamb liner has fatigued. In North Palm Beach’s humidity, the galvanized spring corrodes from the inside out, losing tension after 8-12 years - shorter if the weep holes clog and water pools in the frame.
• Visible daylight or air movement at the meeting rail. The interlock weatherstrip has compressed or the sash has shifted on its pivot bar. Salt crystals from coastal air accelerate rubber degradation; we see this first on east-facing units in Juno Beach and Singer Island installations.
• Condensation between glass panes. The insulated glass unit (IGU) seal has failed, releasing the argon fill. In Florida’s UV exposure, the PIB primary seal degrades faster than manufacturer data suggests - we’ve documented failures at 6 years on south exposures.
• Corrosion pitting at frame corners or weep slots. Anodized aluminum resists salt, but the 5000-series alloy in older CGI frames can show galvanic reaction where dissimilar metals contact. The repair requires frame section replacement, not just cleaning.
• Hardware operates roughly or locks misalign. The multipoint lock mechanism or tilt-latch has worn, often because homeowners force the sash closed against a warped frame. Forcing it compounds the misalignment and eventually cracks the keepers.

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Replacement Cost & What’s Included

What drives the range: frame condition (whether we can retrofit or must reframe), glass specification (clear vs. Low-E vs. impact laminate), and whether the rough opening has settled or leaked. Every quote we write in North Palm Beach itemizes parts, labor, and permit costs separately - Haven Clause 1. The price you sign is the price on the invoice; we don’t discover problems after work starts. Our 365-Day Done Right Promise covers labor and installation; manufacturer defects go through CGI’s 10-year glass and 20-year frame warranty, which we document and file on your behalf.

DIY or Call Us?

There’s a safe middle ground for the curious homeowner. You can check the weep holes for blockage with a piece of wire, verify the lock keepers are free of paint, and confirm the series stamp on the glass corner - all useful information that speeds our quote. What we don’t recommend: removing a sash with a failed balance (the counterweight can release suddenly, and a 35-pound impact sash is unwieldy), cutting glazing tape on an IGU (the vacuum seal requires factory equipment), or attempting to bend a warped aluminum frame straight (you’ll work-harden the extrusion and create a stress fracture).

We are an independent service provider - not affiliated with CGI Windows - and we carry full general liability and workers’ compensation. If the opening isn’t right, the window isn’t right - that’s where we start. Call (561) 475-1246 to schedule your free measured survey; we’ll bring the correct part catalog and a written price before any work starts.

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