Free in-home measure and quote — PGT, CGI and CWS impact lines compared on your actual openings, style by style
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AfterFast, Reliable Custom & Geometric Windows Across Lakes by the Bay
Custom and geometric windows in Lakes by the Bay cost anywhere from $1,800 for a modest arched sash to $5,000+ for a truly oversized opening, and the real story is this: Miami-Dade’s HVHZ rules mean every radius and angle needs its own NOA number on the permit, not a generic Florida approval. That’s where most contractors lose a job to failed inspections, which is exactly why Winslow handles the paperwork before a single pane is ordered. If you’re researching a trapezoid bay window or a curved picture unit, you’re dealing with salt spray and hurricane-load requirements that no other part of Florida touches. Call (844) 901-4551 and we’ll walk you through what your opening actually needs.
Why Winslow Windows & Doors Is Lakes by the Bay’s Preferred Custom & Geometric Windows Company
Ed Winslow started this business in 2011 with his name over the door and a promise that no corporate installer can even whisper: if it’s not done right, we make it right, for 100 years. That’s the Done Right Promise, and it’s the standard we hold for every arched, angled, and oversized window we measure in Lakes by the Bay. The company publishes its address and license number, so when a resident sees our truck pull up, there’s no shell company and no subcontractor roulette behind the logo. Every technician is background-checked and arrives in uniform—identity and professionalism verified before the first handshake.
In this part of Miami-Dade, that matters more than most homeowners realize. Lakes by the Bay sits surrounded by actual inland lakes and within a few miles of Biscayne Bay, which means the aluminum on a pre-Andrew trapezoid sash has spent three decades eating salt and losing structural bite at the jambs. An installer who has never worked HVHZ territory will quote you a beautiful window and quietly skip the design pressure recertification. We do the opposite: inspection first, permit-ready documents before fabrication, and a written material allowance for whatever the rough opening reveals once the old sash is out. That’s why residents off SW 87th Avenue and in the streets near Hidden Lake Park call us when custom work needs doing.
Our Custom & Geometric Windows Services in Lakes by the Bay
Custom Impact Windows
In Lakes by the Bay, every replacement window falls under Miami-Dade’s High Velocity Hurricane Zone, which demands large-missile ratings and design pressures your standard big-box unit can’t touch. We build custom impact windows with laminated glass interlayers rated for the exact wind zone, pull the Miami-Dade NOA for each configuration, and install to pass the first inspection. For homes near the water, we spec hardware that resists salt pitting on the cam locks and jamb screws, because that’s the failure point the wind finds first.
Geometric & Shaped Windows
Parallelograms, triangles, octagons—they’re beautiful, and in pre-Andrew Lakes by the Bay homes, most of them still have original single-pane aluminum that carries no large-missile rating at all. We measure every angle, match the rough opening to a fabricated unit with the proper structural bite, and submit a permit with the exact NOA for that shape. No one ships a “standard” parallelogram. The unit gets built for your wall, and the paperwork gets built with it. That’s the part that keeps the inspector signing.
Arched & Curved Windows
A builder’s arched over-the-tub window from the late 1980s is now 35 years deep in salt spray and UV exposure. The radius might be common, but the jamb screws and sealant are not. We stock and order custom-radius PGT and CGI units for Lakes by the Bay homes, with glazing and frame material chosen for the channel-corrosion conditions off Old Cutler Road. Before we order, we inspect the stub wall around the arch. Rot hides there. So do failed waterproofing membranes. We price the replacement and the repair as one contract, not a surprise change order.
Oversized Openings
When a wall of glass overlooks one of the lakes, the window itself is a structural element. Oversized geometric openings in this part of 33189 need engineering that a triple single-pane won’t satisfy. We handle floor-height panoramic units, corner-wrapping glass, and openings over 10 feet wide, with design pressures matched to the actual elevation and exposure of the home. The permit gets a real set of numbers, not a guess, and we install with a level of anchoring most crews never touch outside high-rise work.
What happens when you call
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A real person answersNo phone trees — you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Lakes by the Bay
Winslow Windows & Doors is an authorized installer for PGT, CGI, CWS, ES Windows, and other premium manufacturers, which means we can order exactly the right custom unit without buying through a middleman’s markup. For Lakes by the Bay customers, that translates to faster fabrication, factory-backed glass breakage coverage, and our own local handling of warranty service. If you bought a PGT arch that failed after a neighbor’s tree hit it, we can source the replacement sash and handle the install. If you need a CGI oversized trapezoid, we pull the right NOA from the factory certificate before the order leaves the office.
Common Custom & Geometric Windows Problems We See in Lakes by the Bay Homes
- Salt-pitted aluminum frames on custom trapezoid and arch windows. The jamb screws lose their bite after years of brackish air, so the wind-load path fails before the glass does. We find this on nearly every pre-2000 shaped window near the water.
- Pre-Andrew non-impact parallelogram windows with no large-missile rating. A retrofit triggers full HVHZ design pressure recertification that original single-pane units can’t pass. The option is a proper impact replacement, not a film or a panel.
- Hidden rot in the CBS buck framing behind oversized geometric openings. Degraded gaskets let moisture ride the lake breeze into the rough opening. Once the old sash is pulled, the wood buck underneath is often soft. We price an allowance for it before we start, so it’s a line item, not a surprise.
- Failed waterproofing around curved and angled sills. A stucco repair over a leaking arch doesn’t fix the flashing behind it. We pull the unit, rebuild the sill pan, and document the repair so the next inspection has a fighting chance.
Pricing for Custom & Geometric Windows in Lakes by the Bay, FL
A straightforward arched replacement in a 1990s CBS house here typically runs $1,800 to $3,200 per unit installed. A true custom radius or an oversized opening with a mullion system can reach $4,500 to $6,000. What moves the number: whether the old rough opening needs buck repair (common near the lakes), whether the shape requires a custom NOA configuration (most do), and where the window sits relative to wind exposure. Second-story openings on water-facing elevations cost more because the design pressure jumps. We include a written material allowance in every quote for Lakes by the Bay jobs, so the framing repairs are a planned line item, not a surprise change order. Call (844) 901-4551 for a free in-home measure and a line-item written quote.
What Custom & Geometric Windows Costs in Lakes by the Bay
Impact windows overall run $800 to $1,500 per window installed across southern Miami-Dade. A custom arched or radius unit sits higher: $1,800 to $3,200 for a standard-size arch, $2,500 to $5,000 for a large or unusually shaped opening, and $4,000 to $8,000 for a full-width oversized geometric wall. Whole-home packages for a typical Lakes by the Bay CBS residence land between $8,000 and $25,000, depending on opening count, floor height, and how many shapes are truly custom versus semi-custom. The frame material changes it too: aluminum impact is the workhorse here, but thermally broken and premium architectural lines cost more. We measure every opening, pull the exact Miami-Dade NOA for each unit, and give you a fixed written quote with no vague allowances beyond the rotted-buck contingency we price up front.
By comparison, hurricane shutters on the same house run materially less in product cost, but they don’t protect anything until someone hangs them. A custom impact window protects 24/7, doesn’t need a human to deploy it, and qualifies for windstorm premium credits that shutters can’t always match. Big-box retail installers can order a stock impact window, but they won’t touch a radius, a trapezoid, or a parallelogram. That work requires a licensed impact specialist who reads wind maps and NOA certificates, not a part number.
Florida Pays You Back
Lakes by the Bay homeowners have a real incentives stack to work with. The My Safe Florida Home program offers matching grants up to $10,000 for qualifying wind-mitigation upgrades, depending on funding cycles and eligibility. Florida’s sales-tax exemption applies to impact-resistant windows and doors, which can knock 6% to 7% off the invoice right away. The federal 25C energy credit covers 30% of product cost on qualifying units, up to $600 per year. And after a wind-mitigation inspection ($75 to $150 in our experience), many carriers discount the windstorm portion of the premium by roughly 25%. We don’t promise a number, because carriers set their own rates, but we do help document every installation so the credits and discounts you’re owed actually clear.
We Also Serve Cities Near Lakes by the Bay
Our crews work across southern Miami-Dade, from Custom & Geometric Windows in Lakes by the Bay to neighboring Cutler Bay, Cutler Ridge, Goulds, and East Perrine. If you’re a few minutes north on Old Cutler Road or west toward the Turnpike, the same NOA-exact permitting discipline applies. The one down the road. Call (844) 901-4551.
Serving Lakes by the Bay, FL — Our Local Coverage Area
We’re based in the Lakes by the Bay area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs — Custom & Geometric Windows in Lakes by the Bay
Generally yes. The Miami-Dade Notice of Acceptance is issued for a specific product line and configuration, and a radius change can fall under a different tested spec than the flat-sash equivalent. A 45-degree trapezoid and a 3-foot arch are not the same document. We pull the factory NOA for the exact shape, size, and frame before the permit application, which is the single biggest reason our Lakes by the Bay permits clear on the first pass. Call (844) 901-4551 and we’ll verify your opening against the NOA database at no charge.
Yes, but only from manufacturers who test in that configuration. PGT, CGI, and CWS all carry Miami-Dade NOAs for select arched, radius, and trapezoidal impact units. The large-missile test involves firing a 9-pound 2×4 at the glass at 50 feet per second, then cycling 9,000 wind-pressure reversals. If the opening is non-standard, we submit the exact geometry to the factory for a custom NOA letter before ordering. No one can legally sell you a curved unit that “probably passes.” It either carries the number or it fails the permit.
The most common is rotted wood buck framing around the rough opening. Salt-laden air rides the lake breeze into the gasket gaps, and over 25 to 35 years the wood behind the stucco wicks enough moisture to soften. We’ve also found failed sill pans, corroded jamb anchors, and old aluminum sashes where the corner keys have pitted completely through. Most recently, in a Lakes by the Bay cul-de-sac off Hidden Lake, we pulled a builder’s arched over-the-tub window and found the jamb screws so corroded from lake-side salt spray they snapped at the face. We had pulled the Miami-Dade NOA before ordering, written a material allowance for the potentially rotted rough opening, and got sign-off on the updated laminated glass interlayer spec when the stub wall revealed failed waterproofing. That’s the job done the right way, not the cheap way.
You start with the right NOA on the permit, because that’s the first thing the inspector checks. If the number doesn’t match the installed unit, it’s an automatic fail and a reapplication. Then you install to the factory anchoring schedule, which for HVHZ units means specific fasteners at specific spacing, not whatever screws the crew brought. Then you document it. We take photos of every anchor and every mullion before the trim goes up, so the inspector sees the connection path. If an issue ever comes back on a final, we’re back out the same week to make it right. That’s the Done Right Promise, and it’s ironclad.
Because Lakes by the Bay sits between multiple water bodies and within a few miles of Biscayne Bay, the air carries a continuous salt load that Kendall, several miles inland, barely sees. That salt settles on aluminum frames, pits the finish, and attacks the fasteners. A custom arch in Cutler Bay might show surface wear after a decade; the same window three blocks from a lake here will show corrosion on the jamb screws much sooner. That’s why we spec corrosion-resistant hardware and marine-grade sealants on every custom job in 33189, even when the manufacturer’s standard package would technically meet code. The code is the floor. The conditions are the real spec. Call (844) 901-4551 and we’ll walk your house with a corrosion checklist before you spend a dollar.
Key Takeaways
- Custom and geometric windows in Lakes by the Bay require a specific Miami-Dade NOA per shape, not a generic Florida Product Approval. We pull it before ordering.
- Prices in 33189 run $1,800–$5,000 per custom unit, more for oversized openings, with the wildcard being hidden rot behind old sashes.
- Salt spray from the lakes and Biscayne Bay corrodes hardware faster here than almost anywhere else in Miami-Dade. We spec marine-grade materials.
- The Done Right Promise means a standard of accountability written into every job.
- Free in-home measure, written line-item quote, and one number that reaches a live person any hour of any day: (844) 901-4551.
Call Winslow Windows & Doors at (844) 901-4551 to schedule your free estimate for custom impact, arched, or oversized geometric windows in Lakes by the Bay. A real person answers. Ed’s name is on the door, and on every job we do.
Written by Ed Winslow, Owner at Winslow Windows & Doors, serving Lakes by the Bay with custom and geometric window expertise since 2011.