Your browser version is outdated. We recommend that you update your browser to the latest version.

  


  

We are committed to a sustainable future with architectural flexibility and style.

All products are suitable for new builds or retrofitting.

Ph: (03) 5338-1797Ph: (03) 5338-1797

  

What is BAL? Why tested products? (BAL and testing explained)

BAL stands for Bushfire Attack Level. As defined in AS3959-2009, there are 5 levels:

BAL Low – Dealing with embers and low radiant heat

BAL 12.5 – Dealing with embers and maximum 12.5kW/m2 radiant heat

BAL 19 – Dealing with embers and maximum 19kW/m2 radiant heat

BAL 29 – Dealing with embers and maximum 29kW/m2 radiant heat

BAL 40 – Dealing with embers and maximum 40kW/m2 radiant heat

BAL FZ (Flame Zone) – Dealing with embers, greater than 40kW/m2, and full flame immersion

 

In 2009, after the ‘Black Saturday’ fires in Victoria, new standards were introduced for building in bushfire prone areas. This standard, AS3959-2009 covers both how to rate the risk to the proposed building (BAL level), and then guides the construction requirements for each level.

During a fire in a BAL FZ situation you can have in excess of 80kW/m2 on the outside of the building. Anything over 15kW/m2 will cause peeling/blistering of skin in seconds, and is why the test for BAL FZ window products require less than 15kW/m2 inside the window. We get around 3kW/m2. Full sunlight in the middle of the day is about 1kW/m2, so that gives some context to the severity of radiant heat in bushfires.

Products tested to AS1530.4 may be legally compliant in some BAL FZ situations, however these products do not have any requirement for radiant heat protection, and leave your safe haven at risk of becoming a furnace inside.

We are confident that our product, the BAL FZ shutter will not only withstand the ferocity of a BAL FZ fire, but also the probable debris impacts that happen during extreme fire events. All while keeping your windows intact, temperatures safe inside, and your home habitable post the fire.

We also find our customers don’t need to think about closing the shutters for bushfire, as they close them in hot weather to keep the house cool. This is a great harmony, where your comfort and safety go hand in hand.