CGI Window Replacement Nationwide | Sightline Windows & Doors Tamiami

CGI Window Replacement: The Tamiami Owner’s Guide

CGI window replacement in Tamiami typically runs $340-$780 per opening installed, depending on series, glazing, and whether the frame is preserved or replaced. We stock CGI-compatible sashes, balances, and hardware for same-day repair on most residential series, and we carry full replacement units for the Estate and Sentinel lines on our Tamiami route trucks. Most owners discover the problem when a window won’t stay open, won’t lock, or shows daylight between sash and frame after a storm season.

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Which CGI Models This Applies To

CGI windows in Tamiami fall into three residential series we see regularly: Estate (aluminum impact), Sentinel (vinyl impact), and Targa (non-impact aluminum). The Estate 4400 and 4500 series use a heavier-duty balance system rated for laminated glass weights up to 90 pounds per sash; Sentinel 2100 and 2300 series run a lighter constant-force coil balance. The critical compatibility gotcha is the sash depth: Estate frames accept a 2-5/8-inch sash thickness, while Sentinel frames are built for 2-1/4-inch. Order the wrong one and the glazing bead won’t seat, or worse, the lock points miss the keepers entirely.

Every CGI unit carries a permanent label in the head jamb or on the sash edge with the model prefix, glass spec, and Miami-Dade NOA number. We match to that label, not to visual similarity. For hardware, we stock OEM CGI locks, lifts, and rollers; for balances and weatherstrip, we use quality aftermarket equivalents that meet the original torque and UV-resistance specs at lower cost. The aftermarket balance decision saves most Tamiami owners $40-$80 per sash without affecting operation, provided the coil weight rating is identical to the stamped spec on the failed unit.

Signs Your CGI Window Replacement Is Failing

• The sash drops or won’t stay raised. This points to a failed constant-force balance, common in Sentinel series after 6-10 years of Florida UV exposure. The coil spring loses tension gradually; by the time the sash falls, the balance has been underperforming for months.
• Locking difficulty or visible gap at the meeting rail. Often the sash has sagged due to worn roller assemblies or the frame has settled slightly out of square. In Tamiami, we see this accelerated by seasonal humidity cycling in wood-frame homes near the Trail.
• Condensation between glass panes. The insulated glass unit (IGU) seal has failed. CGI’s standard IGU warranty is 20 years, but the seal breach itself is not repairable; the sash must be reglazed with a new IGU or replaced entirely.
• Cracked or brittle weatherstrip causing air infiltration. The pile or fin seal has degraded from salt air and UV. Replacement weatherstrip is model-specific; the kerf width varies 3/16-inch to 1/4-inch between Estate and Sentinel, and forcing the wrong size tears the retainer.
• Corroded or seized hardware after storm exposure. CGI’s hardware is anodized aluminum, but the keeper screws and lock cams can corrode if water sits in the sill track. We replace with stainless-steel equivalents where the original design allows.

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Replacement Cost & What’s Included

What drives the range: glass spec (clear vs. Low-E vs. impact-laminated), sash size, and whether the existing frame is square and structurally sound. Every quote we write in Tamiami starts with a measured survey you keep; the scope, the price, and the product spec are fixed before we schedule. Haven Clause 1: the written price before any work starts. Haven Clause 5: no surprises. The 365-Day Done Right Promise covers the installation and hardware; IGU seal failure falls under CGI’s manufacturer warranty, which we document and file on your behalf.

DIY or Call Us?

What you can safely check: clean the sill track of debris, verify the lock engages without forcing, and confirm the weep holes are clear so water drains rather than pools. These three checks solve about 20 percent of the “my window is broken” calls we get in Tamiami.

Where DIY goes wrong: removing a CGI sash without supporting the balance assembly can release stored tension unexpectedly, and the laminated glass in impact-rated units weighs 6-8 pounds per square foot. A dropped Estate-series sash will damage the frame, the glass, or your floor. Reglazing an IGU requires a clean-room environment and proper setting blocks; field attempts without them fail within one season. We carry the right suction cups, setting blocks, and silicone spec for CGI units; most homeowners don’t, and the cost of one mistake exceeds our service call. If you’re uncertain, call (786) 321-9118 and we’ll schedule a measured survey. The estimate is free, and you’ll have the written price before any work starts.

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