Bay & Bow Windows

Bay & Bow Windows in Palm Beach, FL | Winslow Windows & Doors

Bay and bow windows are the architectural move that changes how a room feels the moment you walk in. They push the glass outward past the wall line, adding a few feet of usable interior space while pulling in light from three or four angles instead of one. In Palm Beach, that extra projection reads beautifully on everything from 1920s Mediterranean revivals to newer coastal builds in El Cid and south of Southern Boulevard. Winslow Windows & Doors fabricates these units through our PGT, CGI, CWS, ES Windows, ECO, and Mr-Glass lines, configured in laminated impact glass and engineered to the wind zone your home actually sits in. Whether you’re replacing a tired flat window or designing a reading nook for a Florida room addition, we install every bay and bow unit to HVHZ standards. Call (561) 831-7863 to talk through a configuration.

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Product Overview - Bay & Bow Windows

A bay window is built from three panels: a wide fixed center unit flanked by two angled operable or fixed panels, typically set at 30 or 45 degrees. A bow window uses four to six panels in a gentler arc. Either way, the entire assembly projects outward in one engineered unit with its own structural seat board and head assembly. That geometry is what makes these windows so desirable in Palm Beach: they create a window seat, a plant ledge, or a breakfast nook without adding a single square foot to the home’s footprint.

For Florida construction, the challenge has always been structural. A projecting window is essentially a small room extension, and every seam, joint, and glass unit has to hold up under hurricane wind loading while staying watertight. That’s why we build bay and bow units with laminated impact glass as the default specification, set in aluminum or vinyl frames selected for the exposure. The projecting multi-panel configuration means more glass area than a flat window, so design pressure gets calculated across the entire projection, not just per panel. Our approach in Palm Beach is to treat every bay or bow as a custom assembly: the seat board, mullion layout, angle brackets, and glass package are all matched to the opening and the wind zone, not pulled off a shelf.

Technical Specifications

• Frame materials: Aluminum or vinyl, selected by exposure and architectural style. Aluminum carries the larger spans cleanly; vinyl suits tighter sightlines and lower-maintenance coastal applications.
• Maximum size: Custom fabricated to the opening. We don’t push a bay or bow beyond what the engineering will justify, and we’ll tell you when a configuration needs a structural header or additional support.
• Glass options: Laminated impact glass with a PVB interlayer, Low-E insulated glass, tinted glass, or clear glass. Laminated impact is the default for HVHZ compliance; Low-E and tints layer on top of the impact laminate.
• Color and finish options: White, almond, bronze, black, and tan. Paint-to-match is not offered; stock finishes keep lead times and color consistency predictable.
• Sill options: Standard sill or a seat/shelf sill. The seat/shelf sill is the option most Palm Beach homeowners choose when they want a usable window seat or display ledge, and it changes the interior trim depth.
• Design pressure rating: Matched to your wind zone, up to +/-100 PSF, never higher. This is the number your permit reviewer will look for.

Hurricane & Compliance Performance

Laminated Impact Glass - The glass in every bay and bow unit we quote is laminated with a PVB (polyvinyl butyral) interlayer. When a large object strikes the glass, the laminate holds the shattered pieces in the frame instead of letting them blow through the opening. That’s the difference between a broken window and a breached building envelope during a storm.

Miami-Dade NOA / Florida Product Approval - Every bay and bow configuration earns its own Notice of Acceptance or Florida Product Approval number. These are issued per configuration, meaning the exact glass package, frame profile, and panel layout you choose carries its own approval documentation. The specific NOA or FL number appears on your quote, and you should verify it before your permit submittal.

FBC / HVHZ Compliance - These units are engineered to Florida Building Code High-Velocity Hurricane Zone requirements. HVHZ is the strictest wind code in the country, and Palm Beach County sits squarely inside it. We don’t sell non-compliant units to HVHZ addresses, period.

TAS 201 / 202 / 203 Testing Context - HVHZ-rated products are tested under a specific protocol family: TAS 201 for large-missile impact, TAS 202 for cyclic wind-pressure loading, and TAS 203 for forced-entry resistance. When your building department asks whether the product is “TAS tested,” this is the protocol family they’re referencing. Our approvals verify the testing has passed for your configuration.

Design Pressure for Your Wind Zone - Design pressure is a PSF rating, not a wind speed. It measures how much positive and negative pressure the assembled unit can withstand. Our bay and bow windows are matched to your wind zone, up to +/-100 PSF, and we never specify a higher rating than the engineering supports. A unit rated for a lower wind zone installed in a higher one will fail; we match the number to the address.

Energy Performance Options - Low-E insulated glass is available as a performance layer on top of the impact laminate. In Palm Beach, where east and west exposures take direct sun, Low-E cuts solar heat gain noticeably during the summer while keeping the impact rating intact. Tinted glass is another option for glare control on large bay projections facing the water.

Color & Glass Options

The five finish colors we offer, white, almond, bronze, black, and tan, cover most of what you see on Palm Beach homes today. White and almond work well on the classic Bermuda and British Colonial styles you find in the North End and along Flagler Drive. Bronze and black are the choice on modern builds with deeper trim contrasts, and tan bridges the gap on stucco homes where a white frame would look too stark.

On the glass side, the starting point is always laminated impact glass, because in Palm Beach County the impact rating is not optional. From there, clear laminated glass keeps the view as clean as possible, which matters when your bay window faces the Intracoastal or a garden courtyard. Low-E insulated glass is what we recommend for south and west exposures: it adds a second pane and a low-emissivity coating that reduces heat gain without darkening the room. Tinted glass is best for direct afternoon sun where you want glare control first. Your configuration can mix glass types across panels if one side of the projection takes more sun than another.

Installation by Winslow Windows & Doors in Palm Beach

A bay or bow window is only as strong as the installation. The NOA rating covers the manufactured unit; what happens at the rough opening is entirely on the installer. In Palm Beach, where coastal exposure and HVHZ wind zones are the norm, an improperly flashed or shimmed projection window will leak, sag, or fail under load long before the glass ever gives out. That’s why we install every bay and bow to AAMA 2400/2410 practice, which is the standard for proper window installation in commercial and high-wind residential settings.

Our process starts with a pre-install inspection of the rough opening, the existing header, and the seat area. Bay and bow units carry real structural weight because the entire assembly cantilevers past the wall. We verify the header is sized to carry that load and the seat board has solid bearing before the unit goes in. Then we set the window level, plumb, and square, no exceptions. A bay window set out of square binds at the operable panels and stresses the glass package at the seams.

We seal the perimeter with AAMA 812 low-expansion foam sealant, which is the right product for filling and sealing the irregular gap between a projecting window unit and a stucco or wood opening. Once the unit is fastened and sealed, we run a final water test on the sill and corners before any trim goes back on. In Palm Beach, permitting matters too: HVHZ jurisdictions want the NOA or Florida Product Approval number tied to the specific configuration on the permit application. We provide that documentation with your quote so your permit submittal is not delayed.

Frequently Asked Questions - Bay & Bow Windows

Get a Quote - Bay & Bow Windows in Palm Beach

Bay and bow windows are custom work, and the right first step is a free on-site measurement. We’ll look at the opening, the header, the exposure, and your wind zone, then give you a written line-item quote with the exact NOA or Florida Product Approval number for your configuration. Call Winslow Windows & Doors at (561) 831-7863 to schedule yours.

Written by the team at Winslow Windows & Doors, serving Palm Beach, FL and surrounding coastal communities with hurricane-impact window and door installations.