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.