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Measured in KW/m2, Bushfire Attack Level (BAL) is determined by the Fire Danger Index, the sites vegetation type, distance from the site to the vegetation and the slope of the land under the vegetation.


Intended as a guide only. Refer to  Australian Standard 3959-2009 for full requirements.


BAL (Bushfire Attack Levels) Rating

The new Australian Standard 3959-2009 is now adopted in all States of Australia. The Standard defines bushfire risk levels (bushfire attack level - BAL) and corresponding construction requirements for each BAL-level.


    Different BAL Levels are:

    BAL-12.5: Low
    BAL-19:    Moderate
    BAL-29:    High
    BAL-40:    Very high
    BAL-FZ:    Flame Zone

Vegetation ExampleVegetation Example