CGI Windows & Doors Service Nationwide | Sightline Windows & Doors Three Lakes

Why Three Lakes Homeowners Choose CGI Windows & Doors

We provide CGI Windows & Doors in Three Lakes, FL, including repair, replacement, and new installation of CGI impact-rated units with Miami-Dade County Notice of Acceptance compliance built into every quote. Our measured survey and written price come before any work starts, and every completed job leaves a documented photo record under the Haven Standard.

Call (786) 808-5792

CGI has been a staple line across South Florida since long before the HVHZ rules tightened, and we see more of it in Three Lakes than almost any other brand except PGT. The 1970s through 1990s CBS homes that dominate this neighborhood - most still running original single-pane aluminum or jalousie windows - are prime candidates for CGI impact replacement, but they’re also where we find the most repairable existing CGI units that out-of-county crews want to tear out whole. We’re not affiliated with CGI. We’re an independent service provider that stocks CGI-compatible parts, reads Florida product approval labels correctly, and ties the exact NOA number to your permit application so inspection doesn’t stall. Call (786) 808-5792 to schedule your measured survey.

Why Trust Sightline Windows & Doors Three Lakes for Your CGI Windows & Doors?

Sonia Raman, who leads our crew, completed her building trades training at Miami Dade College’s Wolfson Campus and has spent two decades measuring, fitting, and finishing windows and doors across South Florida. She and our technicians have served Three Lakes for years, including homes backing up to the Killian Corridor where afternoon sun loads punish west-facing CGI vinyl sashes and the wrong glazing choice shows up on your FPL bill every month. Sonia is known for reading a rough opening accurately the first time and for specifying impact-rated units that meet Miami-Dade NOA requirements without upselling product a house doesn’t need.

Our CGI work is specific. We know the difference between a CGI Series 8000 single hung and a Series 8100 horizontal roller in terms of sash balance geometry, frame depth, and which rollers interchange. We stock CGI-compatible tandem roller assemblies, pile weatherstripping, glazing gaskets, and screen frames locally, so most repairs don’t wait on shipping. Every technician is background-checked, uniformed, and identified by license number before arrival - Haven Clause 3, Verified Crews. The price we write after our measured survey is the price on the invoice. Nothing else belongs there.

Common CGI Windows & Doors Problems We Fix in Three Lakes

• Vinyl sash warping on south- and west-facing CGI single hungs. The CGI Sentinel vinyl series and Series 8000 single hungs take a beating from Three Lakes’ afternoon sun load, especially on rear elevations facing the Killian Corridor. Dark vinyl frames absorb heat, soften, and bow inward or outward. The sash binds in the jamb, weatherstrip gaps open, and the unit leaks air even if the glass is intact. We measure the frame squareness and sash deflection, then recommend heat-shield glazing or aluminum-clad alternatives if the orientation makes vinyl a recurring problem.
• Flattened or failed pile weatherstripping and torn corner seals. CGI impact units rely on dense pile weatherstrip and silicone corner seals to stop wind-driven rain at 140+ mph. In Three Lakes’ salt-laden humidity, that pile compresses and hardens; corner seals shrink and tear. Water doesn’t pour through - it migrates. By the time you see interior staining, the sub-sill is wet. We replace with OEM-equivalent pile and fresh silicone corner seals, then water-test before we leave.
• Corroded or flattened tandem rollers on CGI horizontal rollers and sliding glass doors. CGI Series 8100 horizontal rollers and 3-lite sliding glass door units use tandem roller assemblies that ride in an aluminum track. Salt air and grit from Three Lakes’ exposed location grind the nylon wheels flat or seize the stainless axils. Panels drag, jump the track, and won’t pull tight against the jamb strike. We stock the replacement assemblies, clean and lubricate the track, and reset lock strike alignment so the panel seals properly.
• Fogged insulated glass units (IGUs) on older CGI windows. The seal between panes fails - usually from thermal cycling at the edge, accelerated by Three Lakes’ UV load. Moisture enters, silica gel saturates, and you get permanent fog. The frame is fine; the glass is not. We measure the IGU thickness, spacer color, and low-e coating orientation, then order a direct replacement that matches the original Miami-Dade NOA. No need to replace the whole sash unless the vinyl is also warped.
• Resin and glazing gasket shrinkage around impact glass. CGI impact units use a wet-glazed resin system with a rubber glazing gasket. After years of UV exposure, the gasket shrinks, exposing the resin to direct sun. It crazes and cracks. The glass doesn’t fall out - the bite is deep - but the unit loses its design pressure rating on paper. We reglaze with compatible resin and replace the gasket to restore the rated assembly.

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CGI Parts & Our Repair-vs-Replace Approach

We source OEM-equivalent CGI replacement parts from quality aftermarket suppliers: tandem rollers, sash locks, pile weatherstrip, glazing gaskets, screens, and balances for non-impact units. We go OEM only when a warranty claim or Florida product approval requires exact match - the NOA label on your frame tells us which.

A fogged IGU, a failed roller, or torn weatherstrip is almost always repairable. The part cost is a fraction of replacement, and the labor is straightforward. But when we find multiple warped sashes, repeated seal failures across a dozen openings, and original single-pane aluminum frames that predate HVHZ entirely, we’ll tell you directly: replacement is the better long-term spend. We don’t profit from selling you a whole house of windows you don’t need. Haven Clause 1 means the written price reflects what we actually found, not what we hope you’ll buy. Call (786) 808-5792 for a free second opinion on any written estimate.

Our CGI Service Process - Step by Step

1. 1
   Measured diagnosis. We arrive with the license number you were given, inspect the CGI unit for frame squareness, sash operation, glass condition, and hardware function, then photograph everything. You keep the measured survey. We note the exact model, series, and Miami-Dade NOA number from the permanent label.
2. 2
   Written scope and price. Before any work starts, you receive a written quote tied to the measured survey. The price includes parts, labor, and any permit or inspection fees. It does not change unless we find concealed damage we document and discuss with you first.
3. 3
   Repair or install with CGI-compatible parts. We stock common CGI rollers, weatherstrip, and gaskets locally. For IGUs or specialty hardware, we order to match the NOA exactly. Installations follow Miami-Dade HVHZ fastening and anchoring schedules - not the Broward County method, which inspectors here reject.
4. 4
   Test and document. Every repaired or installed unit is operated, locked, and water-tested where accessible. We photograph the completed work, the label, and the permit tie-in. You receive the photo record.
5. 5
   Warranty under the Haven Standard. The 365-Day Done Right Promise covers our workmanship. If it’s not done right, we make it right. The manufacturer’s warranty on parts remains with the OEM.

CGI Products We Service & Install in Three Lakes

We work across the CGI residential line: Sentinel impact-rated vinyl windows; Series 8000 and 8100 impact single hungs and horizontal rollers; impact sliding glass doors and 3-lite roller configurations; vinyl and aluminum entry and storm door systems. We stock rollers, weatherstrip, glazing gaskets, screen frames, and lock hardware for the most common configurations. For full-frame replacement, we specify by what the opening requires - U-factor, SHGC, design pressure rating - not by what we have in the warehouse.

We Also Service These Brands

Our shop carries eight verified manufacturer lines: PGT, CWS, ES Windows, ECO Window Systems, Mr-Glass, Therma-Tru, and ViewLux, alongside CGI. We specify by performance tier and price range, not by margin. A Three Lakes home with PGT Winguard on the street elevation and CGI Sentinel on the rear is common; we service both without pushing a house brand.

FAQs - CGI Windows & Doors Service in Three Lakes

Book Your CGI Service in Three Lakes, FL

Call (786) 808-5792 to schedule your free measured survey. We’ll inspect your CGI windows or doors, document what we find, and hand you a written price before any work starts. Every job carries the 365-Day Done Right Promise and leaves a photo record. No voicemail queue - a live person answers, 24/7.

Written by Sonia Raman, Owner at Sightline Windows & Doors Three Lakes, serving Three Lakes since 2012.