Bushfire Attack Level (BAL) Rating for Owner Builders - QLD - Owner Builder Club

Bushfire Attack Level (BAL) Rating for Owner Builders – QLD

BAL Rating QLD

Diving right in, we're focusing on a topic that's of great importance, the Bushfire Attack Level (BAL) rating for owner builders – QLD.

If you're wondering what a BAL rating is, it's essentially a system that gauges a building's potential risk from bushfire attacks. It considers various factors such as the type of vegetation, the slope of the land, and the Fire Danger Index.

Now, if you're an owner builder in Queensland, understanding your property's BAL rating is absolutely crucial. Why? Because it directly influences how you should design and build your home to withstand a potential bushfire attack.

It's all about preparing and protecting our homes and communities from the devastating impacts of bushfires, which are, unfortunately, a natural part of the Australian landscape.

Whether you're looking to design and build a new home or retrofit an existing one, this guideline is a precious resource.

Queensland and Bushfires

Queensland and its residents have a long history of contending with bushfires. The vast, dry terrain coupled with the state's warm climate makes it particularly susceptible to these fiery disasters. In recent times, the intensity and frequency of bushfires in Queensland have caused significant concern.

For instance, the Carnarvon Gorge bushfire in October 2023 burned through thousands of hectares, leading to the closure of the national park for an additional two weeks. Similarly, in the same month, firefighters had to tackle more than 150 blazes across Queensland and New South Wales, with lightning being the main culprit.

These bushfires pose a threat to the natural landscape and wreak havoc on homes and communities. One such example is the bushfire that destroyed more than 30 homes in southern Queensland. These incidents are stark reminders of the devastation bushfires can cause, and they underscore the importance of preparation and adaptation.

As owner-builders, these incidents serve as lessons about the importance of a bushfire rating system. The Bushfire Attack Level (BAL) rating is a tool that can help us design and construct our homes to be resilient against bushfires.

Bushfire Attack Level (BAL) – QLD

Let's chat about the Bushfire Attack Level or BAL. In a nutshell, BAL is a system that categorises the potential intensity of a local bushfire that a house may experience. It provides an estimate of possible radiant heat and flame exposure from bushfire flame fronts moving through unmanaged vegetation only. This information can help owner-builders to better manage existing buildings or choose locations for new ones.

Unravelling the BAL Rating QLD

The BAL Rating QLD system is broken down into different ratings, each indicating a unique level of risk and exposure to bushfires. Here's what they mean:

  • BAL-12.5: This rating predicts significant ember attack, burning debris, and radiant heat up to a level of 12.5 kW/m2.
  • BAL-19: A step up from the previous rating, BAL-19 indicates greater levels of ember attack, burning debris, and radiant heat up to a level of 19 kW/m2.
  • BAL-29: In this rating, you'd expect even more significant levels of ember attack, burning debris, and radiant heat reaching up to 29 kW/m2.
  • BAL-40: Things get serious at this level. Expect greater levels of ember attack, burning debris, and radiant heat up to 40 kW/m2. Flames from the bushfire front may intermittently make contact with the house.
  • BAL-FZ: This is the highest rating, predicting extreme levels of ember attack, burning debris, and radiant heat in excess of 40 kW/m2. Flames from the bushfire front are likely to engulf part or all of the house.

Assessing your Bushfire Hazards

Understanding your bushfire hazards is a crucial part of managing your home's bushfire resilience. Your potential risks are a mix of several factors, including the intensity of the potential bushfire, the type of vegetation around your house, the weather and topography, and the distance between your house and the vegetation.

Other combustible objects near your house, like neighbouring buildings or materials on your property, also play a role. By defining and mapping these hazards, you can gain a better understanding of how a bushfire might impact your house.

This knowledge can guide your decisions in terms of construction and landscaping to better protect your home from bushfires.

Benefits of Bushfire Resilient Homes and Landscapes

Bushfire-resilient homes and landscapes offer a variety of benefits that extend beyond the obvious advantage of increased protection from bushfires. They are an investment not only in personal safety and property protection but also in the broader community and environment. Here are a few key benefits:

  • Reduction in loss of life: Reduce the risk of fatalities during bushfire events.
  • Decrease in property damage: Less likely to be destroyed or severely damaged during a bushfire, helping to protect your most valuable assets.
  • Enhanced community resilience: Better able to withstand and recover from bushfire events.
  • Lower recovery costs: Help alleviate the cost of recovering from a bushfire.
  • Conservation of biodiversity: Preserve and enhance Australia’s unique biodiversity and ecological value.

Bushfires and Insurance

Most insurance plans cover your home and contents in the event of a bushfire. However, it is common for homes to be underinsured, meaning that many residents face an unexpected financial hit post-bushfire.

A bushfire-resilient home will have an increased chance of surviving a bushfire. Consider discussing the measures you have taken (or propose to take) with your insurer and ask whether these measures may lower your insurance premiums.

Other Benefits

Homes built to high bushfire resilient standards are also energy efficient. They have fewer gaps and openings and better-insulating properties, thus, resulting in a home that requires less energy to heat and cool.

Moreover, they also tend to be better built, meaning lower maintenance costs compared to traditional buildings. These economic and environmental benefits are magnified when considering future predicted climate changes.

The cost of building this home—or retrofitting an existing home to be bushfire resilient—need not be prohibitive. Depending on the size and complexity of your build, a local draftsman or designer can help.

Alignment with Regulatory Guidelines

Various state and federal regulations specify the requirements of planning and building for bushfire resilience to avoid or mitigate the risk of bushfires, protect people and property, and enhance the community’s strength against bushfires. The best indicator of whether these regulations apply to your situation is to identify if you are in a bushfire-prone area.

If you live within or plan to build in a prone area, additional (bushfire specific) building requirements will apply, including constructing to Australian Standards, AS 3959 (2018) Construction of buildings in bushfire-prone areas; or NASH Standard (2014) Steel framed construction in bushfire areas.

Click here to head to the Queensland Government website for more information.


So, you've made it this far and you're ready to face those potential bushfire hazards head-on! That's the spirit!

The first thing you want to do is get to know your area. That means understanding the Bushfire Attack Level (BAL) Rating for Owner Builders – QLD, looking at how close you are to bushfire-prone areas, and keeping an eye out for any other hazards that might be lurking on your property. With all this in mind, you'll be well on your way to preparing for any bushfire events that come your way.

So, in a nutshell, taking a proactive approach to understanding, assessing and mitigating bushfire hazards will lead to safer, more resilient communities. It's more than just protecting your property – it's about safeguarding our wider community and environment too. Together, we can make a difference!

Frequently Asked Questions

What is the Queensland Bushfire Plan?

The Queensland Bushfire Plan is a comprehensive document created by the Queensland Government that outlines the state’s strategic approach to managing and mitigating bushfires. It provides guidelines for effective bushfire management and details the roles and responsibilities of various agencies and stakeholders involved in bushfire management.

Click here to go to the guide.

How can the community contribute to bushfire management?

Community involvement is essential in effective bushfire management. This can include participating in local bushfire planning, understanding and adhering to local fire regulations, reporting any suspicious fire activity, and preparing personal bushfire survival plans.

Who are the key agencies involved in bushfire management in Queensland?

Several agencies are involved in bushfire management in Queensland, including the Queensland Fire and Emergency Services (QFES), the Department of Environment and Science (DES), the Queensland Parks and Wildlife Service (QPWS), and local governments.

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