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Bay Window

APRO - Aluminum Window - Bay Window
Large bow window letting in natural light

A bay window projects outward from a building’s wall, creating extra interior space. Typically featuring a central fixed pane and angled side windows, it allows light from multiple directions. Bay windows are ideal for living rooms or kitchens, offering panoramic views, more sunlight, and added architectural charm.

Large bow window letting in natural light

Expanded Interior Space

Panoramic Outdoor Views

Improved Ventilation Options

Versatile Design Configurations

Energy Efficiency

Architectural Appeal

New Bay Window Designs

White box bay window with outward casement panels
Box Bay Window
Casement bay window with multiple glass panels
Casement bay window
Interior curved circle bay window with trees
Circle Bay Window
Exterior view of fixed bay window on modern home
fixed bay window
Oriel style upper floor bay window exterior
Oriel Window
Create a Dual Purpose Space Bay Window Ideas
Custom Window for Your Project
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Bay Window Series

Thermally Insulated:

Bay Window Series technical section drawing with dimensions
Bay Window Series aluminum frame with double glazing
Primary product designatorClass CW-PG40: Size Tested 1200mm × 1800mm (47.24in. x70.87in.)-Type DAW
Positive Design Pressure Pa (psf)1920 (40.10)
Negative Design Pressure Pa (-psf)-1920 (-40.10)
Water Penetration Resistance Test Pressure Pa (-psf)290 Pa (6.06)
Glass6mm double lowE+12Ar+6mm, double lowE +12Ar+6mm clear glass
U-Factor (W/m2-K)SHGCVTAir Infiltration (L/S-m2)Air Exfiltration (L/S- m2)ER
1.630.250.410.020.0219

Certificates We Got

NPRC Logo
Logo Certificate
Energy Star Logo
Australian Standard Logo
ISO Logo
CE Logo
CNAS Logo
American Architectural Manufacturers Association Logo
Energy Star Guangzhou Apro Tilt Turn Window energy ratings
Energy Star Guangzhou Apro Fixed Window energy ratings
Explore Our Bay Window

Custom Options for Your Bay Window

Frame material

Glass options

Window Configurations

Interior Finishes

Grid Styles

Roof and Seat Options

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Bay Window Accessories

To complete the look and functionality of your bay window, a range of stylish and practical accessories is available.

Bay Window Accessorie silver central locking latch
Bay Window Accessorie two small black mounting plates
Bay Window Accessories full hardware kit component
Bay Window Accessories two stainless steel hinge
Bay Window Accessorie silver adjustable door hinge
Bay Window Accessorie small silver locking latch set
Bay Window Accessories two silver window locking cam
Bay Window Accessorie sleek silver window handle
Bay Window Accessorie black handle and metal latch part
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Ideal Applications

casement windows for Kitchens application
Kitchens
casement window for Bathrooms application
Bathrooms
casement window for bedroom application
Bedrooms
casement window for Living rooms application
Living rooms
casement window for modern room application
Consultant for your space
Elegant curved bow window on porch wall

How Bay Windows Are Tested

Elegant curved bow window on porch wall

Bay windows undergo rigorous testing to ensure long-term performance and safety. Tests include structural integrity to verify load-bearing capacity, air and water resistance to prevent leaks and drafts, and thermal performance checks for energy efficiency. Additionally, durability is assessed through simulations of long-term weather exposure and repeated use.

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Bay Window vs. Other Window Types

FeatureBay WindowPicture WindowCasement WindowSliding Window
StructureProjects outward with three panels (center fixed, side operable)Large, fixed pane; does not openHinged on side; opens outward with a crankSashes slide horizontally along a track
VentilationGood; side windows can openNone; fixed designExcellent; full window openingModerate; one or both sashes can open
Natural LightExcellent; multiple angles capture more lightExcellent; unobstructed viewGood; depends on size and placementGood; large glass area
Adds Interior SpaceYes; creates additional floor spaceNo; flush with wallNo; flush with wallNo; flush with wall
Energy EfficiencyGood; may require quality sealingVery good; fixed design minimizes air leakageExcellent; tight seal when closedModerate; potential for air leakage
CostHigher; complex installation and materialsLower; simple design and installationModerate; depends on size and featuresLower; simple design
Best UseLiving rooms, kitchens, reading nooksAreas emphasizing views and natural lightRooms requiring ventilation, like bathrooms and kitchensSpaces with limited exterior clearance

FAQs About Bay Windows

What is a bay window?

A bay window is a window structure that projects outward from the main walls of a building, forming a bay inside the room. Typically made up of three or more panels—usually a central fixed window flanked by operable ones—bay windows not only add architectural interest but also expand the interior space.

Bay windows offer several advantages, including increased natural light, enhanced views, additional interior space, improved ventilation (if operable side windows are included), and added architectural interest to both the interior and exterior of a home.

Yes, bay windows can enhance a home’s curb appeal and interior aesthetics, potentially increasing its market value. Their ability to add space and natural light makes them a desirable feature for many homebuyers.

Absolutely. Bay windows can be tailored to fit specific design preferences, including choices in frame materials (wood, vinyl, aluminum), glass types (tinted, Low-E), window configurations (casement, double-hung), and additional features like built-in seating or storage.

Permit requirements vary by location. In many cases, replacing an existing window with a bay window doesn’t require a permit. However, installing a new bay window that alters the structure or appearance of the home may necessitate one. It’s advisable to check with local building authorities.

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October 28, 2026 No Comments

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