Altair Louvre Windows: No bushfire shutters required at BAL-29

News /
22 July 2013
Altair Louvre Windows: No bushfire shutters required at BAL-29
Altair Louvre Windows pass BAL-29 bushfire testing.

Breezway Altair Louvre Windows with Crimsafe mesh screens are the only louvres that have been tested by the CSIRO to BAL-29 bushfire conditions, allowing them to be used without the need for bushfire shutters.

The Australian Standard that governs the windows used in buildings in bushfire prone areas of Australia (AS3959-2009) aims to ensure that the glass in the window doesn’t fail, but if it does, that embers are still kept out by screens/shutters. Windows can comply with specific minimum characteristics (glass type, screen type etc) for each Bushfire Attack Level (BAL) specified in the Standard, or can undergo testing to prove their ability to withstand the expected bushfire conditions.

Up to BAL-19 the Standard requires Altair Louvres to have their 6mm thick glass blades toughened and to have a woven metal mesh screen fitted to the outside of the window. This is an acceptable solution to the majority of Breezway customers.

Above BAL-19 though, because the Altair louvre clips that hold the blade in place are plastic (not metal), the Standard only allows two options: Either:

  1. cover the entire window with bushfire shutters, or
  2. pass physical testing to BAL-29, BAL-40 or BAL-FZ conditions.

With bushfire shutters not popular with the majority of our customers, Breezway submitted an Altair Louvre to the CSIRO in Sydney for testing to BAL-29 bushfire conditions.

The testing involved installing a Breezway Easyscreen Altair Louvre Window into a section of moveable brick wall with multiple sensors positioned on the inside and outside of the window. The test had both fixed windows and Altair Louvres with Crimsafe woven metal mesh screens fixed to the outside of the louvre bays. This successfully passed the BAL-29 bushfire test and can therefore be used in buildings with BAL-29 bushfire ratings without the need for bushfire shutters.


Breezway manufactures Altair Louvre Windows in glass, timber and aluminium. They are energy and cyclone rated and suitable for multi-storey applications.

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