In February 2009, Victoria experienced devastating bushfires. On Black Saturday, February 7, over 4,500km2 of land was affected, with a shocking 173 lives lost and 78 communities destroyed. Prior to 2009, Bushfire Attack Levels (BAL) ratings for windows had four levels of bushfire attack. In response to the 2009 fires, Australian Standard 3959 was updated and republished as AS3959:2009 with six levels of bushfire attack. The Australian Window Association published a booklet as a guide for the different construction requirements for windows and doors in each level.

bal-table

Table: A Guide to Windows and Doors in Bushfire Prone Areas, Australian Windows Association, 2012