CGI Custom & Geometric Windows Nationwide | Winslow Windows & Doors

CGI Custom & Geometric Windows in Miami: What to Know First

We install, service, and replace CGI custom and geometric windows across Miami, and most jobs are quoted within 48 hours and completed inside a two-week window once materials land. As an independent CGI service provider, we’re not tied to a single distributor’s inventory, which means we can source the exact custom shape you need without markup games. If you own a CGI window in Miami, especially a radius, arch, trapezoid, or oversized unit, call (863) 862-5435 and we’ll give you a straight answer on whether it needs repair or full replacement.

Call (863) 862-5435

This page is for homeowners who already have CGI windows or are planning a custom CGI installation and want to understand how these units age in South Florida’s salt air, humidity, and hurricane seasons. We’ll walk through the failure patterns we see most often, what repairs actually cost here, and why a custom-shaped window is not the same job as a stock rectangle.

How CGI Products Fail, and How We Fix Them

CGI builds a serious impact window. But custom and geometric shapes introduce stress points that rectangular units don’t have, and Miami’s climate finds every one of them. Here’s what we see on service calls:

• Radius and arch unit seal failure at the apex. On CGI’s Estate Collection and Sentinel series, curved glass puts uneven pressure on the glazing seal at the crown of the arc. After five to seven years of Miami sun and salt exposure, that seal begins to separate, and you’ll see condensation between the panes that won’t wipe off. The fix is a full insulated glass unit replacement, not a reseal. We order the exact radius from CGI’s glass spec sheet, not a “close enough” arc from a local fabricator, because a 2-degree miss on an arch is visible from the street.
• Geometric frame racking after rough weather. Triangular and pentagon windows, common above entry doors and in gable ends, concentrate wind load at the narrow corners. CGI’s frame design holds up, but the rough opening around it often doesn’t, especially in older Miami homes with wood framing that flexes. The symptom is a window that suddenly sticks or won’t latch. We don’t just shim it and walk away. We check the rough opening for movement, correct it, and reset the unit so it operates like new.
• Hardware corrosion on coastal properties. CGI stainless hardware resists rust, but nothing in a salt-spray zone is immune. Homes within a mile of Biscayne Bay or the Atlantic see pitting on handles and hinge points faster than inland neighborhoods like Kendall or Doral. When a CGI crank operator on a shaped window corrodes, we replace it with the correct OEM operator. Aftermarket copies don’t match the gear ratio, which means the sash doesn’t seat tight and the impact rating is compromised.
• Oversized custom units with sagging sashes. CGI makes large custom windows, and when a sash spans more than five feet in width, weight becomes a long-term factor. We see this on sliding geometric windows where the rollers wear unevenly and the sash drops a quarter inch, enough to break the interlock seal. The fix is roller replacement plus a frame alignment check, and we always confirm the unit still opens and closes within CGI’s tolerance before we call it done.
• Impact glass delamination at exposed edges. On custom trapezoid and parallelogram windows, the laminated glass edge is sometimes more exposed to direct rain and sun than on standard rectangles, depending on how the unit was flashed. Over time, moisture creeps into the laminate edge and the glass starts to look milky. This is a controlled replacement: we remove the sash, order the exact glass package from CGI’s lamination spec, and re-install. It’s not a fast fix, but a patch job here fails inspection and your warranty.

Our CGI Custom & Geometric Windows Process

Every CGI job in Miami follows the same path, whether it’s a single arched transom or a full wall of custom geometric units. Here’s how it works when you call us:

1. 1
   Call and talk to a real person. You call (863) 862-5435, someone answers, and we schedule a site visit. No call center, no ticket number. You’ll know who’s coming before the truck pulls up.
2. 2
   On-site inspection and measurement. We measure every dimension of the existing opening, check the frame for racking or rot, and document exactly what’s on your wall today. For custom shapes, we photograph the window and note the CGI label data so we order against the original build sheet, not a guess.
3. 3
   Parts decision: OEM vs. quality aftermarket. Here’s where we’re straight with you. For anything structural, glass, locking, or impact-related, we use CGI OEM parts, period. For trim, caulk, and non-structural components, we’ll use quality aftermarket options when they save you money without touching performance. You get both options on the estimate, with prices.
4. 4
   The repair or replacement. Our techs handle the full job, from removing the old unit to setting the new one, flashing it to Miami-Dade code, and sealing for wind-driven rain. We don’t sub out the critical work.
5. 5
   Testing and cleanup. We operate every sash, confirm the interlock seats tight, check the sealant lines, and walk the job with you before we leave. The site is cleaner than we found it. That’s the standard.
6. 6
   The 36500-Day Done Right Promise. If anything we touched isn’t done right, we come back and make it right. Ed’s name is on the door, literally, and he’s not going anywhere.

What CGI Custom & Geometric Windows Costs in Miami

Pricing depends on the complexity of the shape, whether you’re repairing or replacing, and what part of Miami the home sits in. Here’s what we quote most often. These are installed ranges, not bare-part prices:

What moves the price: the exact radius or angle, whether the unit is a standard CGI production shape or a true custom built to order, and whether the rough opening needs reframing. Homes in Coral Gables and Coconut Grove with older framing often need opening work before the new window goes in. Call (863) 862-5435 and we’ll quote it exactly. Estimates are free, and we’ll stand behind every number.

Why Miami Homeowners Call Winslow Windows & Doors for CGI Work

We’ve been doing windows in South Florida since 2011. Ed Winslow grew up in Kendall and learned the trade at Miami Dade College, then spent years working alongside installers across the county before putting his own name on a truck. That means when you call us about a CGI custom window, you’re talking to someone who knows Miami’s building codes, the salt air problem near the bay, and which products hold up when August storms roll in off Biscayne Bay. If a CGI unit is the wrong call for your opening, we’ll tell you straight. We also install PGT, CWS, ES Windows, and ECO Window Systems, so if a different brand fits the job better, we’ll say so instead of forcing a square peg. Every tech is background-checked and arrives in uniform. Every call gets answered by a live person, 24 hours a day. And every job carries the 36500-Day Done Right Promise: if it’s not done right, we make it right. My name is on the door, literally.

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