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Bay windows don’t just sit in a wall. They extend beyond it. That’s what makes them special. Three or more windows angled outward from your exterior wall, flooding your room with natural light and creating space that didn’t exist before.
A bay window is a window structure made up of three or more windows that extend outward from the exterior wall of a house. They project beyond the facade at set angles, creating additional space inside the room and allowing natural light to enter from multiple directions. Bay windows can improve airflow compared to standard fixed picture windows when side windows are operable. Most bay windows include a combination of fixed windows in the centre with operable casement windows or awning windows on the sides for ventilation.
Bay windows became widespread in America during the California Gold Rush, reflecting their growing popularity in architectural design during the 19th century.
Bay windows come in several configurations, including box bay windows, canted bay windows, and circle bay windows, each tailored to different architectural requirements and visual preferences. Box bay windows project straight out from the wall and form a rectangular shape, making them popular in contemporary homes for their clean lines and additional floor space. Canted bay windows, commonly seen in Victorian architecture, feature a central flat window with two angled side windows, forming a polygonal shape that adds traditional charm to facades.
Bay windows typically use three panels at defined angles, 30, 45, or 90 degrees. Circle bay windows, also known as bow windows, consist of multiple glass panels arranged in a gentle curve, providing expansive views and a distinctive architectural statement. Both extend outward from the wall, but bow windows create a softer, more rounded projection. Circle bay windows are a variation of the bow style with a more pronounced curve.
Bay windows cost will vary depending on the size, number of panels, style, glass configuration, and installation requirements of your project. Because bay windows involve more glass, more frame material, and more complex installation than a standard flat window, they are a larger investment. Replacing a bay window typically costs between $500 and $1500, influenced by factors such as size, shape, and material. Contact us for a free quote tailored to your property.
Yes. Bay windows can be installed as part of renovations or as a replacement for existing windows. The installation process will depend on the wall structure and whether additional support is needed. APS handles the full bay window installation including measurement, structural assessment, manufacturing, and fitting.
Yes. When built with double glazing and uPVC frames, bay windows provide excellent energy efficiency. The insulated glass units reduce heat transfer, keeping your home warmer in winter and cooler in the summer months. Argon gas fill and LowE coatings come standard with every APS bay window.
Yes. Double glazed bay windows significantly reduce outside noise. The two panes of glass with an insulating gap between them create an effective sound barrier. Acoustic glass upgrades are available for homes near busy roads, flight paths, or high-density areas.
APS offers traditional bay windows, modern bay windows, curved bay windows, bow windows, and corner windows. Each style is custom designed and available in a range of configurations, colours, and glazing options.
Absolutely. Every opening panel features German engineered multi point locking systems. Glass options include toughened and laminated safety glass. All APS bay windows are internally glazed, meaning the glass cannot be removed from the outside.
No. uPVC bay windows are low maintenance. The frames don’t need painting, sanding, or sealing. They resist corrosion, fading, and UV damage. Just wipe clean with soapy water. They’re built to last decades without losing performance or appearance.
Timber bay windows should be finished with high-quality exterior-grade paint or sealant to protect against moisture and pests. Aluminium bay windows with powder-coated finishes should be cleaned using pH-neutral solutions to preserve their colour and finish.
Yes. The additional space created by a bay window is perfect for a built-in window seat, a seating area, a desk, or storage. Many homeowners design the bay specifically with seating or storage in mind. We can advise on the best configurations to suit your room and your lifestyle.




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Explore the unparalleled features our double glazed bay windows offer, enhancing not just your home’s aesthetics but your overall living experience in Melbourne.
APS Double Glazing is the premier manufacturer & installer of high performance UPVC double glazing windows & doors in Melbourne.
Get Your Free QuoteAPS Double Glazing is more than just a supplier of double glazed corner windows; we’re a partner in enhancing the comfort and style of your home. Our commitment to quality, innovation and personalised service makes us the premier choice for homeowners:
Discover how corner windows in the kitchen can solve common space and lighting issues, enhancing your cooking experience.
A bay & corner window can be made up of several sections and combinations from two sections right up to ten sections or more. APS offers a variety of styles, colours and decorative glass options.
These windows provide superior ventilation, seal extremely well and are very user-friendly. They have a high-security locking system, unlike a traditional single-glazed aluminium window. While we assure that you will get the best in terms of quality, our range is priced competitively. If you need bay windows for sale, do not miss out our options.
Homes across Melbourne, Victoria, and other parts of Australia face challenges such as temperature fluctuations, road noise, and strong sun exposure. Bay and corner windows must be designed for these conditions, not just for appearance.
APS Double Glazing designs double glazed bay and corner windows specifically for Australian homes, taking into account orientation, exposure, and lifestyle requirements. Systems are custom-measured and locally installed to ensure proper fit, sealing, and long-term performance.
Whether upgrading an older property or enhancing a modern home, bay and corner windows can significantly improve comfort while modernising the look of your space.
If you are planning a window upgrade in Melbourne or across Victoria, bay and corner windows offer a practical way to improve light, comfort, and performance.
Contact APS Double Glazing today to request a tailored quote or learn more about our bay and corner double glazed window systems. You can also explore our full range of energy-efficient and noise-reducing window solutions to find the right fit for your home.
Extended range of colour options are available upon request.
Corner windows offer several benefits, including enhanced natural light, improved ventilation, expanded views and a more spacious feel to the room. By utilising corner spaces, you can maximise the brightness and openness of your living spaces while adding a modern architectural element to your home.
Yes, bay windows are well-suited for homes in Melbourne climate. With proper insulation and double glazing, bay windows can help regulate indoor temperatures, provide energy efficiency and offer protection against harsh weather conditions. Additionally, their design allows for ample natural light, making them ideal for brightening up rooms in any climate.
Double glazed bay windows provide enhanced thermal insulation, noise reduction, and energy efficiency compared to standard bay windows. The double glazing construction consists of two panes of glass with a layer of inert gas in between, creating a barrier against heat transfer and external noise, resulting in a more comfortable and peaceful indoor environment.
To ensure the longevity and durability of your corner or bay windows, it’s essential to invest in high-quality materials and professional installation. Opt for reputable manufacturers and suppliers who offer products with warranties and maintenance guidelines. Regular cleaning, inspection and timely repairs, if needed, will also help extend the lifespan of your windows and maintain their performance over time.
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