What is considered a standard aluminium window frame?

Assume that aluminium frames are standard unless the manufacturer provides a Window Energy Rating (WERS) which demonstrates that better energy performance will be achieved by using the particular frame. The generic U-value for this type of frame is 12.7.

What is a thermally broken aluminium window frame?

A thermally broken aluminium window is made so that the heat conduction through the frame is disrupted. A thermally broken frame will provide a window with a lower U-value than a similar standard aluminium frame.

How do I achieve energy efficiency compliance for my home?

Energy efficiency compliance requirements vary across the state and territories of Australia. The AGWA has created a short guide to outline the basic information that is required to provide compliant, fit for purpose window and door products in relation to these varying requirements across different jurisdictions.

AGWA Guide to Energy Efficiency Compliance (pdf)

What types of Climate Zone are there and which one am I in?

There are eight climate zones, ranging from 'Hot', 'Mixed' and 'Cold'. Each zone is distinct and should be observed closely, especially when determining which windows and doors are right for your home.

The AGWA has provided a series of guides that explains the eight different climate zones and what's best for you and your home.

• Selecting Glass and Windows for Hot Climates: Northern Australia, Brisbane and Darwin.
• Selecting Glass and Windows for Mixed Climates: Sydney, Perth and Adelaide.
• Selecting Glass and Windows for Cold Climates: Australian Capital Territory, Tasmania, most of Victoria and southern parts of New South Wales and Western Australia.

Can I buy windows that will reduce the noise from outside my home?

Yes, but unfortunately, resolving noise problems is often a complex issue. The most effective barrier against noise is to have two panes of glass (each of a different thickness) spaced at 100 - 200 mm apart. Unfortunately this is often not practical in an average home. Laminated glass is the next best option to reduce noise but is usually effective only at the high frequencies (ie. aircraft noise). Recent technological advances in some laminated glass interlayers have shown improved acoustic reduction. A thicker interlayer than the standard one can also be more effective in noise reduction.

When looking for a solution for specific noise problems we recommend consulting with an acoustic engineer before taking any action as the frequency of the outside noise will impact on effectiveness. Even with acoustic windows fitted if there is even the smallest of air leaks anywhere (for example: under a door, through roof tiles, vents, light fittings, masonry cracks, poorly sealed windows, etc.) the noise reduction from the windows will be counteracted. 

What is an Rw + Ctr rating?

Rw + Ctr is a weighted sound reduction index that uses airborne sound and measures how much it is reduced through a window or door by testing. It is averaged over a range of frequencies with the Crt an adjustment for lower frequencies. For specific frequencies a report from an acoustic engineer may be required.

If your question remains unanswered after reviewing our FAQs, please submit it to our technical department.