To ensure the building envelope limits the use of combustible materials to enhance the building’s bushfire resistance.
S43C10 states the building envelope must align with AS 3959 – BAL 19 or greater. Combustible materials allowed under AS 3959 can only be used if permitted by C2D10(4), (5) or (6). This provision ensures the building envelope's design meets strict bushfire resilience criteria, limiting potential fuel sources during a bushfire event.