Bushfire Attack Level is the measure of a site's potential exposure to bushfire attack, set under AS 3959. The levels run BAL-LOW, BAL-12.5, BAL-19, BAL-29, BAL-40 and BAL-FZ (Flame Zone), reflecting increasing radiant heat, ember and flame exposure.
Your BAL determines the construction requirements for the building, including limits on combustible materials. A non-combustible substrate like aluminium is a useful starting point on BAL-rated land, though final compliance always depends on the complete wall system.
Planning a woodgrain aluminium project?
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