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Maintaining a home

How to build a bushfire-resilient house

4 March 2022

If you live out in the bush, you probably enjoy calm evenings and striking landscapes. But it’s not all peace and tranquillity — at some point, you may also need to defend your home from a bushfire. Boris Iskra from Forest and Wood Products Australia talks about building and designing a bushfire-resistant home.

A bushfire-resilient house can still look good

What comes to mind when you think of a bushfire-safe home — a drab concrete fort?

In reality, a bushfire-resilient home can look like a regular, aesthetically pleasing house. If you’re in a low to medium risk area, you’ll probably have a range of materials to work with.

It doesn’t have to be expensive

Certain upgrades to low to medium risk sites can be surprisingly affordable. Think low-cost materials like mesh to seal openings.

Where to start

When building in a bushfire-prone area, always consult the Australian Bushfire Standard. It’s free and easy to download. Here are some general tips to get you started.

Know your BAL level

This refers to the severity of your fire risk. Homes range from BAL 12.5 (the lowest risk level), to BAL-FZ (the highest risk zone with direct flame exposure). Get a professional to assess your BAL level, or look for pointers online

Don’t be under-insured

Prepping for bushfire season includes getting the right insurance for your most valuable asset. When you take out a Suncorp Classic Extras Home Insurance policy, you'll automatically receive Safety Net Home Protection included in your cover.*

That means you'll be covered for up to 25% extra than your set home sum insured if repair or rebuilding costs exceed your home sum insured. Read the Product Disclosure Statement for more details on what is and isn’t covered.

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Think about the surrounding environment

‘’The landscapes, slopes and vegetation all have an impact on bushfires,’’ says Boris Iskra. Homes built on or near steep slopes typically have higher BAL ratings, since bushfires travel faster uphill. High-density vegetation also poses a risk, so trim where you can.

Mind the gaps

When we think of bushfire destruction, we tend to picture houses ravaged by the flame front. When in reality, most homes catch ablaze when embers creep in through small gaps. ‘’Houses can burn from the inside out,’’ says Boris. ‘’The weakest link in our buildings are the openings in our walls, windows and doors.’’

Aim to seal any gaps wider than 2mm. The Australian Bushfire Standard provides the best guidelines on how you should go about this. But you should generally use:

  • concrete or terracotta roof tiles and non-combustible roof framing, and
  • stainless steel bushfire mesh over openings.

Protect doors and windows

Choose toughened glass windows. The thickness of the glass panes ranges from 4mm (for lower BAL ratings) to 6mm (the most extreme).

Opt for roller doors to keep the flames out. The thickness of the glass will again, depend on how at-risk your home is.

Use the right materials

‘’Timber is one of the most sustainable materials out there,’’ says Boris. ‘’It’s the ultimate renewable and capture technology.’’ In low to medium risk areas (up to BAL 29), you can build your whole internal structure — walls, roofs, cabinets and bookshelves — out of bushfire-resistant timber.

Timber is also multipurpose. It’s a very good insulator in winter, and prevents the summer heat from seeping in.

Brick, concrete and steel work well as alternative fire-safe options too.

Add an external structure

‘’The external structure, or protective ‘envelope’ exists to keep the fire out,’’ says Boris. The Bushfire Standard provides extensive info on external wall structures for your specific BAL rating. But brick, timber, concrete and steel are good defenses. In many cases, it’s as simple as adding a mesh screen.

Don’t forget landscaping

‘’You want to minimise the amount of fuel that could catch alight,’’ says Boris. This means you should avoid planting garden beds around your house or swap them out with heat-resistant plants. ‘’Having paved areas around your house is a good way to provide a bit of separation’’. Remember to also keep your drains and gutters clear of leaves, branches and other debris.


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* No cover for storm, flood, or bushfire in first 72 hours (limited exceptions). Limits, conditions and exclusions apply.

Disclaimer: Insurance issued by AAI Limited ABN 48 005 297 807 trading as Suncorp Insurance. Please read the Product Disclosure Statement before buying this insurance. Go to for a copy. The Target Market Determination is also available. The information is intended to be of a general nature only. We do not accept any legal responsibility for any loss incurred as a result of reliance upon it – please make your own enquiries. This advice has been prepared without taking into account your particular objectives, financial situations or needs, so you should consider whether it is appropriate for you before acting on it.