Introduction

If you’re planning a renovation, replacing old windows or building a new home, you may be wondering: how much do double glazed windows cost in Australia?

As a general guide, double glazed windows can cost around $300–$1,500 per square metre, depending on the window type, frame system, glass specification, size, hardware and installation requirements.

For aluminium double glazed windows, the final price can vary significantly depending on the system and level of customization.

There is no single fixed price for double glazing. A small fixed window, for example, will have a very different cost from a large sliding door or custom-shaped window.

The best way to get an accurate price is to have your project assessed based on the actual dimensions and specifications.

What Affects the Cost of Double Glazed Windows?

Several factors can influence the final price of double glazed windows.

1. Window Size and Quantity

Larger windows require more glass and aluminium. Larger or heavier panels may also require stronger hardware and additional structural considerations.

The total number of windows and doors in your project will also affect the overall cost.

2. Window and Door Type

Different styles require different materials, hardware and manufacturing processes.

Fixed windows are generally simpler, while sliding, awning, casement, double-hung, bi-fold and other systems can vary in price.

Large sliding doors and specialised or custom-shaped windows may cost more due to their size and complexity.

3. Glass Specification

Double glazing can be configured with different glass types and thicknesses.

Depending on your project, options may include:

• Low-E glass
• Toughened safety glass
• Laminated glass
• Acoustic rated glass

The right glass specification depends on your home’s orientation, climate, noise environment and performance requirements.

4. Aluminium Frame System

The frame is just as important as the glass when considering window performance.

Standard aluminium and thermally broken aluminium systems have different thermal performance characteristics. Thermally broken systems use an insulating barrier within the frame to reduce heat transfer.

When comparing products, consider the complete window system rather than looking at the glass alone.

5. Hardware and Installation

Handles, locks, rollers and other hardware can affect the final price.

For replacement projects, you may also need to consider the cost of removing existing windows, disposal, installation and site access.

Always check whether a quotation is supply only or supply and installation.

What Are the Benefits of Double Glazing?

Double glazed windows consist of two panes of glass separated by a sealed insulating cavity. Compared with single glazing, this configuration can help reduce heat transfer through the window.

For Australian homes, potential benefits include:

Improved Thermal Comfort

Double glazing can help reduce heat transfer between the inside and outside of your home, helping maintain a more comfortable indoor environment.

Better Energy Efficiency

Reducing heat transfer through windows can help reduce the amount of heating and cooling required, depending on the overall design and performance of the home.

Reduced Outside Noise

Double glazing can help reduce external noise. However, acoustic performance depends on the complete window system, including glass thickness, configuration, frame and installation.

Improved Everyday Comfort

Better-performing windows can contribute to a more comfortable and energy-efficient home throughout the year.

Aluminium Double Glazed Windows from Sunny Windows & Doors

At Sunny Windows & Doors, we provide custom aluminium windows and doors for Australian homes and building projects.

Our range includes sliding, awning, fixed, casement, double-hung, louvre and other window styles, as well as sliding, hinged and bi-fold doors.

Depending on your project, we can provide double glazing and thermal break aluminium systems to suit different performance requirements.

Whether you’re replacing one window or planning a complete new home project, our team can help you find a suitable solution.

Contact Sunny Windows & Doors for a Free Quote.

Sunny Windows & Doors — Bring Sunshine to Every Home.

FAQ

How much do double glazed windows cost in Australia?

Double glazed windows can cost approximately $300–$1,500 per square metre, depending on the frame, glass, size, window style, hardware and installation requirements. This is an indicative range rather than a fixed price.

Are aluminium double glazed windows worth it?

Aluminium double glazed windows can provide a combination of durability, low maintenance and improved thermal performance compared with traditional single glazing. The right system depends on your home, project requirements and budget.

Can I replace my existing windows with double glazing?

Yes. Double glazed windows can be suitable for many renovation and replacement projects. Your existing openings, window condition and installation requirements should be assessed before choosing a new system.

Do double glazed windows reduce energy bills?

Energy-efficient windows can help reduce heat transfer and may reduce heating and cooling requirements. However, actual energy savings depend on the overall design of the home, including insulation, orientation, shading and heating and cooling systems.

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