Window Standards Australia: A Homeowner’s Guide to Compliant Windows and Installation

New windows are one of the biggest investments you’ll make in your home, so you’d expect them to meet Australian Standards. Unfortunately, that isn’t always the case.

A recent 7NEWS report found that substandard windows are still being installed in new Australian homes. Industry-commissioned testing earlier this year found 87 per cent of the imported products tested failed Australian Standards. Window imports from Vietnam have also jumped 1,700 per cent in just six months, prompting questions about where these products are really coming from.

In this guide, we explain the window standards in Australia, how windows are tested, what a compliant installation looks like, and how to check that the windows going into your home are up to scratch.

What Are the Window Standards in Australia?

Several Australian Standards, together with the National Construction Code (NCC), govern how windows are made, tested and installed. Here are the key ones every homeowner should know.

AS 2047: Windows and External Glazed Doors in Buildings

AS 2047 is the main Australian Standard for residential windows and glazed doors. It sets minimum performance levels for:

• Structural strength: how well the window withstands wind pressure
• Water penetration resistance: how well it keeps out driving rain
• Air infiltration: how much air leaks through the window when it’s closed
• Operating force: how easily it opens and closes

Windows that comply with AS 2047 should carry a performance label showing their ratings. If a supplier can’t show you one, treat that as a red flag.

AS 1288: Glass in Buildings

AS 1288 covers how glass is selected and installed, including when safety glass is required. Areas such as doors, low-level glazing, bathrooms and spaces near stairs often need Grade A safety glass to reduce the risk of injury if the glass breaks.

Energy Efficiency, WERS and the NCC

The NCC sets energy efficiency requirements for new homes, and windows play a big part in meeting them. In Victoria, new homes must now achieve a 7-star energy rating, and poorly performing windows can make that much harder to reach.

The Window Energy Rating Scheme (WERS) rates windows on how well they keep heat in during winter and out during summer. To learn more, read our guide to the energy efficiency of uPVC windows and doors.

AS 3959: Bushfire Requirements

If your home is in a bushfire-prone area, your windows may need to meet the requirements for your property’s Bushfire Attack Level (BAL) under AS 3959. This can affect your choice of frame material, glass type and screens.

How Are Windows Tested to Australian Standards?

To prove compliance with AS 2047, windows are put through a series of laboratory tests that simulate real Australian conditions:

• Wind pressure testing checks that the frame and glass can handle the wind loads expected in your area without failing or deflecting too much.
• Water penetration testing sprays the window with water while applying air pressure, simulating wind-driven rain.
• Air infiltration testing measures how much air passes through the closed window, which affects draughts and energy efficiency.

The testing laboratory matters. Independent testing by a NATA-accredited laboratory gives you far more confidence than a certificate issued by the manufacturer itself. As the 7NEWS report highlights, a certificate isn’t always proof that the product in front of you actually meets the standard.

Why Are Non-Compliant Windows Ending Up in Australian Homes?

Cheaper imported windows have become increasingly common in the Australian market. Australia’s Anti-Dumping Commission is currently investigating whether Chinese aluminium windows and doors are being sold here at unfairly low prices. If dumping is proven, extra duties can be applied.

Local industry groups are now concerned that some products may be routed through other countries, such as Vietnam, to avoid those potential duties. Not everyone agrees. Some Australian businesses argue that many imported components are simply good products at a better price.

Where a window is made matters less than whether it has been properly tested, certified and installed to Australian Standards. Many high-quality window systems are manufactured overseas. The real problem is products that don’t meet the standard yet end up in homes anyway. That’s why it pays to know what to check before you buy. Our guide on how to choose quality windows and doors (and a supplier you can trust) walks you through the questions to ask.

Australian Standards for Window Installation

Even a fully compliant window can fail if it’s installed badly. Poor installation is one of the most common causes of leaks, draughts and water damage around windows.

What a Compliant Installation Involves

A compliant window installation should:

• Fix the window securely into the opening so it can handle wind loads
• Keep the frame square, level and plumb so it seals and operates properly
• Seal the gap between the frame and the wall to stop air and water getting in
• Include flashing that directs water away from the frame and wall cavity
• Follow the manufacturer’s installation instructions, along with the relevant Australian Standards and NCC requirements

Window Flashing and Australian Standards

Flashing is a waterproof material installed around a window opening. It directs water out of the wall rather than letting it seep into the frame, cavity or interior linings. It’s one of the most important parts of an installation, and it’s one of the details most often done poorly.

Flashing requirements come from a few sources. The NCC sets weatherproofing requirements for external walls. AS 2047 includes provisions for installing windows. AS/NZS 4200.2 covers installing wall wraps and sarking, including how they’re detailed around window openings.

Good flashing generally includes:

• Sill flashing under the window to catch and redirect any water that gets past the frame
• Head flashing above the window to stop water running down the wall into the frame
• Correct lapping, where each layer overlaps the one below so water always runs outwards
• Proper integration with the wall wrap so there are no gaps for water to get behind

If you’re searching for the Australian Standards PDFs, note that Standards Australia sells them; they aren’t available free online. The NCC itself is free to access through the Australian Building Codes Board (ABCB) website.

Common Installation Mistakes That Cause Leaks

• Missing or incorrectly lapped sill flashing
• Gaps between the flashing and the wall wrap
• Sealant used in place of proper flashing
• Frames installed out of square, causing seals to fail
• Drainage holes in the frame blocked by sealant or debris

Problems like these often don’t show up until months later, when water damage appears inside the wall. That’s why choosing a supplier who handles the installation themselves can make a real difference.

Window Safety Requirements in Australia

The NCC also includes safety rules to reduce the risk of falls, particularly for young children. For bedroom windows where the floor is 2 metres or more above the ground below, the openable part of the window generally needs to be restricted to an opening of 125mm, or protected by a compliant screen. This applies when the openable part is within 1.7 metres of the floor.

Window restrictors and fixed screens are the most common ways to meet this requirement. Some window styles, such as tilt and turn windows, also offer a safe ventilation position. Window security matters too. Read more in our guide on how secure uPVC windows are.

How to Check Your Windows Meet Australian Standards

Whether you’re building, renovating or arranging window replacements, here’s what to check before you commit.

Look for the AS 2047 Performance Label

Compliant windows should carry a label showing their AS 2047 performance ratings. Check that the ratings suit your home’s location and wind exposure.

Ask for Independent Test Reports

Ask your supplier for test reports from an independent, NATA-accredited laboratory. Make sure the reports cover the exact window system you’re buying, not just a similar product.

Check the WERS Rating

Ask for the WERS rating of the windows you’re considering, particularly if you’re building a new home that must meet energy requirements. Our guide to double glazed vs triple glazed windows explains how glazing choices affect performance.

Ask How the Windows Will Be Installed

Ask who will install your windows, how they handle flashing and sealing, and whether the installation is covered by the warranty. A supplier who manufactures and installs their own windows has full responsibility for the result.

Consider the Frame Material

Frame material affects energy efficiency, durability and maintenance. If you’re weighing up your options, our comparison of aluminium vs uPVC windows breaks down the key differences.

How Vue Windows Meets Australian Standards

At Vue Windows, we build our uPVC windows and uPVC doors using Aluplast profiles, a premium German uPVC system used in millions of homes worldwide. Learn more about the Aluplast advantage.

Our windows are designed to meet Australian Standards, including AS 2047, and are paired with high-performance double glazing for comfort and energy efficiency. Just as importantly, our own experienced team carries out every installation, so the flashing, sealing and finishing are done properly the first time.

With quality materials and careful installation, uPVC windows can last for decades. Find out how long uPVC windows last and how to maintain them to keep them performing at their best.

Frequently Asked Questions

What are the Australian Standards for windows?

The main standard is AS 2047, which covers the performance of windows and external glazed doors. AS 1288 covers glass selection and installation, and AS 3959 applies in bushfire-prone areas. The National Construction Code also sets energy efficiency, weatherproofing and safety requirements.

Do all windows in Australia need to comply with AS 2047?

Windows and external glazed doors installed in Australian homes are generally required to comply with AS 2047 under the NCC. Always ask your supplier for proof of compliance before you buy.

What is the Australian Standard for window flashing?

Flashing requirements come from the NCC’s weatherproofing provisions, AS 2047’s installation requirements, and AS/NZS 4200.2 for wall wraps and sarking around openings. The manufacturer’s installation instructions should also be followed.

Are window restrictors required in Australia?

In many cases, yes. Under the NCC, bedroom windows where the floor is 2 metres or more above the ground generally need openings restricted to 125mm, or a compliant screen, when the openable part is within 1.7 metres of the floor.

How can I tell if my windows are compliant?

Look for the AS 2047 performance label, ask for independent NATA-accredited test reports, check the WERS rating, and confirm the windows will be installed to Australian Standards.

Get Compliant, High-Quality Windows Installed Across Melbourne

If you want peace of mind that your new windows meet Australian Standards and are installed properly, Vue Windows can help. We supply and install premium uPVC windows and doors across Melbourne.

Contact Vue Windows today to request a quote or arrange a consultation.