three stems faqs
What is BAL?
The Bushfire Attack Level (BAL) rating categorises the severity of potential bushfire exposure and dictates the minimum construction requirements necessary to increase a building’s resistance to bushfires.
BAL-LOW: Low risk, no special construction requirements.
BAL-12.5: Low to moderate risk, some ember protection required.
BAL-19: Moderate risk, additional ember protection and protection against radiant heat.
BAL-29: High risk, more stringent requirements for ember protection and radiant heat.
BAL-40: Very high risk, even stricter construction requirements.
BAL-FZ (Flame Zone): Extreme risk, requires the highest level of protection, including against direct flame contact.
When designing a building in a bushfire-prone area, knowing the BAL is essential to ensure compliance with local regulations and to enhance the safety of the building’s occupants.