Bay and Bow Windows

Bay and Bow windows are excellent for inviting natural light into your home and offering expansive, clear views.

However, when choosing the perfect fit for your home, it’s crucial to note key differences between Bay and Bow windows in terms of ventilation options, size variations, and total cost.

Bay window above console table with forest view

Bay Windows

Bay windows project from the home’s exterior wall, providing interiors with more natural light than a standard window. They usually comprise three elements: a large, stationary window in the center, flanked by two identical, operable windows. The central pane aligns parallel to the exterior wall, with the side windows angled outward to join it. Traditionally, the side windows can be opened, providing ventilation, while the center window remains fixed.

Ventilation

While the Bay window traditionally has an inoperable, middle window, the two  windows that flank the main window are typically operable, providing varying degrees of ventilation based on the specific style of the windows selected.

Bay windows are an optimal choice for smaller openings when the aim is to enhance natural light, as compared to Bow windows. However, for larger openings, the central window of a Bay setup may need to be oversized to prevent it from protruding excessively from the home’s exterior.

The projection of a Bay window is available with 10, 15, 30, and 45 degree angles from the center window to the two flanking windows. For this reason, given a specific size of an existing window opening, the homeowner has flexibility in the size and depth of the window.

Bay windows offer homeowners a versatile interior space that can be utilized in various ways. This area can be transformed into a charming display nook for plants, a cozy spot for pets to enjoy the sunlight, or a creative corner for showcasing artwork or collectibles.

Bow Windows

Like Bay windows, Bow windows extend out beyond the home’s exterior wall and let in much more light than a basic window. Unlike Bay windows, Bow windows are made of several smaller windows that come together to form a large arc. These smaller  windows can be both operable or inoperable, depending on window style selected.

Ventilation

Bow windows can provide great  ventilation, depending on the style of window selected. Double hung and casement windows are most commonly used. Most Bow windows are configured with a combination of venting and non-venting windows.

The number of smaller windows needed to create the Bow can be adjusted to accommodate larger window openings. In some cases of larger window openings, the gentle arc of the window creates a shelf on the interior of the Bow, creating additional floor or shelf space, depending on the height of the window.

Bow windows are  custom-made with sets of matching windows. This means that you can choose the number of windows (known as lites), the size of the windows, the depth of the shelf and the angles of the individual windows.

Bow windows offer a more gentle projection than Bay windows, which creates an elegant exterior design feature.

Why Do We Prefer OKNA Windows?

 OKNA Windows has built an industry reputation by combining state-of-the-art equipment, advanced technologies, and dedicated craftsmanship. We know OKNA windows are built to last and will keep your home looking beautiful and your family comfortable for years to come.

Air infiltration (or air leakage) measures how much outside air can sneak in through tiny gaps in a new window. The lower the number, the more energy-efficient your window is—because the air you’ve already heated or cooled stays where it belongs. And while solar coatings help only when the sun is shining, airtight windows improve efficiency 24/7. That’s why we strongly recommend Okna windows. They’re engineered to be exceptionally airtight, and the Okna EnviroStar Double Hung boasts an air infiltration rating of 0.01 - the best in the industry!

Design pressure (DP) refers to how much external force a window can withstand without compromising its structural integrity. It measures a window’s ability to resist wind, water, and other environmental pressures. Okna windows have some of the highest DP ratings available for residential replacement windows.

Okna windows are renowned for their exceptional appearance and meticulous craftsmanship. Their sleek profiles and clean lines create a timeless, elegant look that enhances any home. With a wide range of styles, finishes, and colors, homeowners can easily customize their windows to match their architectural style and personal preferences. The precision manufacturing behind every Okna window ensures a refined, sophisticated finish.
Arched bow window with cushioned seat and garden view

Everyone at WoW went above and beyond, and exceeded my already high expectations. Our house is now warmer, quieter, and looks so much better!

Anne D.

Window Replacement Centreville, VA

Simply put, it was one of the best contracting / house project experiences we’ve had.

Trey P.

Window Replacement Vienna, VA

What Okna Window Is Right for My Home?

Okna has several options to fit your design needs and budget. Here are a few of our favorites.

Living room featuring Starmark Evo replacement windows

Starmark Evo

Starmark Evo Casement Windows offer beauty and functionality. The superior design makes it ideal for not only single windows but also for multiple assemblies like bows, bays, and picture windows as well as your own original combinations. A beveled screen frame offers the appearance of wood molding for added beauty.

Kitchen with energy-efficient Enviro-Star window above sink

Enviro-Star

The Okna Enviro-Star is Okna’s premier Replacement Window. The Enviro-Star combines superb craftsmanship with an old world look and feel. This Series offers a myriad of glass and structural options to seamlessly blend with any décor while providing the utmost in energy efficiency. Since all Okna products are custom-made, you can be sure of a perfect fit every time.

Modern living room showcasing Insul‑Tec replacement windows

Insul-Tec 500

The Insul-Tec combines excellent craftsmanship with a traditional look and feel. This series offers all the benefits you come to expect from vinyl windows with a variety of options to make your home energy efficient while enhancing its beauty. Since all Okna products are custom-made, you can be sure of a perfect fit, which translates to savings on time and labor during installation.

Our Reviews Speak for Themselves

Our reputation for client service excellence means everything to us. Our Client Care process ensures you are informed throughout your project, with no surprises. As you can see from our hundreds of 5-star reviews, we consistently exceed our clients’ expectations. We look forward to showing you the “WoW difference” in home improvement contracting.

Everyone at WoW went above and beyond, and exceeded my already high expectations. Our house is now warmer, quieter, and looks so much better!

Anne D.

Window Replacement Centreville, VA

Simply put, it was one of the best contracting / house project experiences we’ve had.

Trey P.

Window Replacement Vienna, VA

You Are 3 Easy Steps Away from Project Success!

  • Schedule a No-Pressure Consultation

    One of our experts will discuss your project either in your home or virtually

  • Discuss Your Project

    Our expert will learn about your needs, ask some questions, and suggest the best products and service for your specific project and budget, empowering you to make informed decisions

  • Choose WoW and Relax!

    When you choose to partner with us, you can rest assured we will take care of every detail and keep you informed every step of the way

Exterior shot of home showing Three‑step home improvement process