Buyers Guide to Bay Windows
What are Bay Windows?
Typically comprised of three windows, a bay window offers a unique design that extends out from the home, maximizing natural light, ventilation, curb appeal, and space in any room. Bay windows group your preferred combination of double-hung, casement, and fixed (inoperable) windows into a single unit installed in your window opening. Because of a bay window’s large size and weight, they do require a wide rough opening, and are often installed by tying into your home’s roof rafters for plenty of support. Keep this in mind if you’re considering a bay window for the first floor of your two-story home. First-floor bay window installations will often require additional framing to be built out beneath the window for support.



Benefits of Replacement Bay Windows
Create the cozy bay window of your dreams!
- Your preferred combination of double-hung, casement, and fixed windows
- Angled design adds space to any room, and lets in plenty of light and ventilation
- Interior is finished with an oak or birch seat, matching ceiling space, and wood sideboards
- Sets your home apart with classic architectural detailing.
Improveit’s Performax54 Bay Windows
Three double-hungs? Two casements and a double-hung? Two double-hungs and a fixed window in the middle? No matter how you design your custom bay window, you’ll get Performax54 benefits for each one. Every window we offer is part of the Performax54 line, featuring our best-in-class frames, sashes, glass, and spacers to maximize your energy efficiency on top of the excellent style and functionality.
Bay Window Styles & Options
Performax54 Windows Are Available In These Colors

Exterior: White
Interior: White

Exterior: Beige
Interior: Beige

Exterior: Brown
Interior: White

Exterior: Clay
Interior: White

Exterior: White
Interior: Wood

Exterior: Beige
Interior: Wood

Exterior: Any
Interior: Any
Window Grid Design Options

No Grid

Colonial Grid

Diamond Grid

Prairie Grid
What’s the Difference Between Bow & Bay Windows?
The primary difference between bay and bow windows is the number of windows included in each. While bay windows typically have three windows creating an angular installation, bow windows incorporate up to five windows, which creates a softer curved effect for the window unit. Angular bay windows are used in more modern designs, while curved bow windows are often selected for Victorian, Tudor, and even rustic-style homes. Learn more on our blog!
Do Bay Windows Have Seating?
Yes! Improveit’s Performax54 bay windows are installed with an oak or birch bench seat, allowing you to create a reading nook, kitchen window seat, or extended seating for any room in your home. Because of their structure extending out from the home, bay windows also have a ceiling, which will be finished to match the bench. A can light fixture can also be added to the bay window seat for additional lighting.