What is AS2047? The Definitive Guide to Australian Window Standards

If you are planning a residential or commercial building project in Australia, understanding local building regulations is critical to ensuring structural integrity, safety, and compliance. Among these regulations, AS2047 is perhaps the most vital standard for windows and external glazed doors.

But what exactly is AS2047, and why does it matter so much for compliance with the National Construction Code (NCC)? In this definitive guide, we break down everything you need to know about this mandatory Australian standard.

What is AS2047?

AS2047 (Windows and external glazed doors in buildings) is the mandatory Australian Standard that specifies the performance requirements for windows and sliding/folding glazed doors used in external walls. First established by Standards Australia, this regulation ensures that window assemblies can withstand the unique and harsh climatic conditions of the Australian continent—from intense UV radiation to severe cyclonic winds.

Unlike aesthetic or structural guidelines that are optional, AS2047 compliance is a legally mandated requirement under the Building Code of Australia (BCA) / National Construction Code (NCC).

The Core Performance Requirements of AS2047

To achieve AS2047 certification, a window system must pass a series of rigorous physical tests in a NATA-accredited laboratory. The standard classifies windows based on their ability to resist environmental forces through three key pillars:

1. Structural Deflection (Deflection Under Wind Load)

Windows must prove they can resist wind pressure without excessive bending or flexing. The displacement of any framing member must not exceed a specific ratio of its span when subjected to the designated Design Wind Pressure.

2. Water Penetration Resistance

To prevent internal water damage and mold growth in Australian homes, AS2047 mandates that windows must prevent water leakage at a specified test pressure, determined by the project’s wind classification (e.g., N1 to N6, or C1 to C4).

3. Air Infiltration (Air Leakage)

Energy efficiency is deeply tied to how airtight a building envelope is. AS2047 limits the amount of air that can leak through a window assembly, ensuring lower energy costs and better HVAC performance for air-conditioned spaces.

Window Ratings and Wind Classifications

AS2047 links window performance directly to the location and terrain where the building stands. In Australia, housing sites are assigned a Wind Classification (pursuant to AS4055), and windows must match or exceed these ratings:

For commercial or multi-story residential buildings, wind loads are calculated more precisely using AS/NZS 1170.2 instead of generic housing classes.

Why Is AS2047 Compliance Crucial for Builders and Architects?

• Legal Compliance & Occupation Certificates: Building certifiers will not issue a final Certificate of Occupancy if the windows lack valid AS2047 performance compliance certificates.
• Mitigating Liability: Installing non-compliant, uncertified imported windows exposes builders and developers to catastrophic financial risks, structural failures, and costly retrofits.
• Energy Efficiency: High-performance, AS2047-certified windows contribute significantly to achieving the mandatory 7-star NatHERS energy ratings for modern Australian homes.

Conclusion: Partner with an AS2047-Certified Expert

When sourcing windows and doors for your next project, do not compromise on compliance. At MEICHEN Windows & Doors, all our premium architectural aluminum window systems are rigorously tested and fully certified to meet and exceed AS2047 standards.

Contact our technical team today to request our NATA test reports and specification manuals for your upcoming tender.