The Complete Guide to Standard Aluminum Window Sizes

Ⅰ. Introduction

Aluminium windows are highly valued for their durability, sleek design, and energy efficiency. Whether you are constructing a new building or renovating an old one, understanding the standard sizes of aluminium windows is crucial. This knowledge not only helps in planning but also ensures cost efficiency and ease of installation. In this comprehensive guide, we will delve into the standard aluminium window sizes across different regions and explore why opting for standard sizes is often more advantageous than custom dimensions.

Ⅱ. Why Use Standard Window Sizes?

Opting for standard window sizes comes with several benefits:
Time Efficiency: Standard-sized windows are readily available, reducing the waiting time compared to custom-made windows which can take longer to manufacture.
Cost Savings: Standard windows are often more cost-effective than custom sizes. They are mass-produced, which typically lowers the price.
Ease of Replacement: Finding replacements for standard window sizes is much easier and quicker. Custom sizes can be challenging and more expensive to replace.

Ⅲ. How to Measure Window Sizes?

Accurate measurement is critical when installing new windows. Here’s a step-by-step guide:
Measure the Width: Take three measurements across the top, middle, and bottom of the window opening. Use the smallest measurement.
Measure the Height: Measure the height from the top to the bottom on the left, center, and right. Again, use the smallest measurement.
Subtract 0.5 inches: To ensure a proper fit, subtract 0.5 inches from both the width and height measurements. This allowance ensures the window fits within the opening comfortably.

Ⅳ. Standard Aluminium Window Sizes in Different Countries

Aluminum window sizes can vary by region. Here’s an overview of standard sizes in the UK, USA, and Australia.

1. UK: Common Window Sizes

In the UK, window sizes are typically measured in inches.

Window TypeWidth Range (inches)Height Range (inches)
Single Hung24 – 4836 – 72
Double Hung24 – 4836 – 72
Sliding36 – 8424 – 60
Casement20 – 4024 – 72
Awning24 – 4824 – 36

2. USA: Standard Window Sizes

In the USA, window sizes are measured in inches.

Window TypeWidth Range (inches)Height Range (inches)
Single Hung24 – 4836 – 72
Double Hung24 – 4836 – 72
Sliding36 – 8424 – 60
Casement20 – 4024 – 72
Awning24 – 4824 – 36

3. Australia: Typical Window Sizes

In Australia, window sizes are measured in millimeters.

Window TypeWidth Range (mm)Height Range (mm)
Single Hung600 – 1200900 – 1800
Double Hung600 – 1200900 – 1800
Sliding900 – 2100600 – 1500
Casement500 – 1000600 – 1800
Awning600 – 1200600 – 900

Ⅴ. Picture Window Standard Sizes

Picture windows are fixed windows that do not open. They are designed to provide an unobstructed view of the outside and allow ample natural light into a room.

Standard sizes for picture windows vary, but common dimensions include:
Small Picture Windows: Widths: 24 – 48 inches  Heights: 24 – 36 inches
Medium Picture Windows:  Widths: 48 – 84 inches  Heights: 36 – 60 inches
Large Picture Windows: Widths: 84 – 120 inches  Heights: 60 – 72 inches

picture window image

Ⅵ. Casement Window Standard Sizes

casement window image

Casement windows are hinged on the side and open outward like a door. They are known for their excellent ventilation and unobstructed views.

Common casement window sizes include:
Small Casement Windows: Widths: 20 – 24inches  Heights: 36 – 48 inches
Medium Casement Windows:  Widths: 24 – 36 inches  Heights: 48 – 60 inches 
Large Casement Windows: Widths: 36 – 48 inches  Heights: 60 – 72 inches 

Ⅶ. Sliding Window Standard Sizes

Sliding windows move horizontally along a track and are ideal for rooms with limited space.

Typical sliding window sizes are:
Small Sliding Windows: Widths: 36 – 48inches  Heights: 24 – 36 inches
Medium Sliding Windows:  Widths: 48 – 72 inches  Heights: 36 -48 inches 
Large Sliding Windows: Widths: 72 – 120 inches  Heights: 48 – 60 inches 

sliding window image

Ⅷ. Awning Window Standard Sizes

awning window image

Awning windows are hinged at the top and open outward, allowing for ventilation even during light rain.

Typical awning window sizes are:
Small Awning Window: Widths: 24 – 36 inches  Heights: 24 – 36 inches
Medium Awning Window:  Widths: 36 -48 inches  Heights: 36 -48 inches 
Large Awning Window: Widths: 48 – 60 inches  Heights: 48 – 60 inches 

Ⅸ. Tilt and Turn Window Standard Sizes

Tilt and turn windows offer dual functionality. They can tilt inward for ventilation or turn inward for easy cleaning.

Typical tilt and turn windows sizes are:
Small tilt and turn windows: Widths: 36 – 48inches  Heights: 24 – 36 inches
Medium tilt and turn windows:  Widths: 48 – 72 inches  Heights: 36 -48 inches 
Large tilt and turn windows: Widths: 72 – 120 inches  Heights: 48 – 60 inches

tilt and turn window image

Ⅹ. Bay Window Standard Sizes

bay window image

Bay windows project outward from the main walls, creating a spacious feel and offering panoramic views.

Typical bay window sizes include:
Small bay window: Widths: 36 – 48 inches  Heights: 36 – 48 inches
Medium bay window:  Widths: 48 – 72 inches  Heights: 48 – 60 inches 
Large bay window: Widths: 72 – 120 inches  Heights: 60 – 72 inches 

11. Double-Hung Window Standard Sizes

Double-hung windows have two operable sashes that can move up and down, providing excellent ventilation and easy cleaning.

Standard double-hung window sizes are:
Small double-hung window: Widths: 24 – 36 inches  Heights: 36 – 48 inches
Medium double-hung window: Widths: 36 – 48 inches  Heights: 48 -60 inches 
Large Sliding Windows: Widths: 48 – 60 inches  Heights: 60 – 72 inches 

double-hung window image

12. Conclusion

Understanding the standard sizes of aluminium windows can significantly ease the process of selection, installation, and replacement. Whether you are looking for picture windows, casement windows, sliding windows, awning windows, tilt and turn windows, bay windows, or double-hung windows, knowing the standard sizes available can save time, reduce costs, and ensure a perfect fit for your home.

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