Is Artificial Grass a Bushfire Risk? BAL Zones Explained

The short answer

If your block is on bushfire-prone land, no Bushfire Attack Level rating applies to a synthetic lawn. BAL ratings come from AS 3959, the Australian Standard for building in bushfire-prone areas, and landscaping falls outside its scope. A supplier who tells you their turf is "BAL-29 approved" is quoting something the standard does not issue for a ground surface.

The practical question is a different one. Synthetic turf is a plastic product, it melts where an ember lands on it, and where you put it relative to the house matters. None of that makes it forbidden on a bushfire-prone property. Councils and fire authorities answer the fire question through landscaping and asset protection rules rather than through a rating certificate.

What a BAL rating measures

A Bushfire Attack Level describes the bushfire exposure a building is likely to face, expressed as radiant heat flux in kilowatts per square metre. The level for a site comes from the surrounding vegetation type, the slope of the land, the distance to that vegetation, and the region's Fire Danger Index. AS 3959 defines six of them.

Level	Radiant heat exposure	What drives the risk
BAL-LOW	Insignificant	No specific construction requirements
BAL-12.5	Up to 12.5 kW/m²	Ember attack, low radiant heat
BAL-19	12.5 to 19 kW/m²	Increasing ember attack and radiant heat
BAL-29	19 to 29 kW/m²	Significant ember attack and radiant heat
BAL-40	29 to 40 kW/m²	Very high heat, some likelihood of flame contact
BAL-FZ	Above 40 kW/m²	Direct flame contact, the flame zone

Those numbers read better with a reference point. Around 5 kW/m² causes second-degree burns to exposed skin inside a minute, timber ignites with a pilot flame at roughly 10 to 13 kW/m², and timber self-ignites only around 25 to 33 kW/m². Even BAL-12.5, the lowest rated construction level, describes conditions well past what a person can stand in.

Getting a level assigned is a formal process. In New South Wales, the Rural Fire Service publishes a bush fire prone land map you can check by address, but a BAL certificate for an approval has to come from council or an accredited bushfire consultant. Other states run comparable systems through their own fire authorities and planning schemes.

Why the standard stops at the building

AS 3959 sets construction requirements for building elements: subfloor supports, floors, external walls, windows and doors, roofs, verandahs and decks. Its purpose is making a structure more likely to survive ember attack, radiant heat and flame contact. Ground surface finishes are outside its remit, which is why you will never find a turf product listed against a BAL level.

The nearest the standard gets to your yard is decking. Decking boards, stair treads, landings and ramps pick up requirements when they fall within 300mm of glazing that is less than 400mm above the deck surface, on the logic that a burning board that close to a window can break the glass and let fire inside. Turf is not covered by that clause, though the reasoning is worth borrowing when you decide how close to run a synthetic lawn to a window.

Fire authorities manage the yard through a separate mechanism, the asset protection zone: a buffer around the building kept at a low fuel load so radiant heat, flame and ember attack are reduced before they reach the walls. If your property has an APZ condition attached to a development consent, that is the document to read, not the turf spec sheet. Our guide on whether you need council approval for artificial grass covers the broader planning picture.

How synthetic turf behaves around fire

Turf yarn is polyethylene or nylon, tufted into a backing and weighted with sand infill. Polyethylene softens and melts well below the temperatures a fire produces, so the typical failure mode is melting rather than a spreading flame. A live ember landing on the pile leaves a small, permanent melted hole, and enough embers leave a lot of them.

The components behave differently from each other, which is worth knowing before you treat the whole system as one material. Silica sand infill is non-combustible, rubber crumb is not, and that is the reason we stick to sand across our range. The backing and the seam adhesives add a small amount of plastic mass under the pile, and the compacted crushed rock base underneath adds none.

Put together, the realistic risks on a bushfire-prone block are ember damage to the surface and a continuous plastic sheet running hard up against the house. Both are manageable through layout, which is the same conclusion the CFA's landscaping guidance reaches for gardens generally: break up fuel continuity, avoid flammable mulches, and keep flammable objects well back from the walls.

The fire tests suppliers do quote

Since no BAL rating exists for turf, suppliers quote flooring fire tests instead. The common one in Australia is AS/ISO 9239.1, the radiant panel test. A horizontal sample goes under a gas-fired radiant panel that produces a heat gradient across it, a flame is applied at the hot end, and the test records how far the flame travels before it self-extinguishes. The result is a critical radiant flux figure in kW/m², and higher is better. That is a useful number, and it answers a different question from the one a bushfire certifier is asking.

Test or standard	What it answers
AS 3959 (BAL)	How a building must be built for its assessed bushfire exposure
AS/ISO 9239.1	How far flame spreads across a floor covering before it goes out
Asset protection zone standards	How much fuel is allowed in the buffer around the building

A supplier quoting a flooring flame-spread result has told you something real about the material, and has still not told you the product is approved for a bushfire zone, because nothing issues that approval for landscaping.

What we can and cannot say about our own range

APT's brochure states that its turf products are tested to AS/ISO 9239.1, the flooring radiant panel test described above. The SynRye flyer carries a Class A fire rating badge and a Melt-Safe claim of withstanding up to 220°C, both manufacturer figures, and the Coolplay Green flyer carries an Australian fire safety approval badge.

A badge on a flyer is not a test report, and we have not sighted the underlying certificates for those two badges. None of our six products has been tested or certified against AS 3959, because that standard does not test landscaping products. If a certifier or insurer asks for fire documentation on a specific product, tell us and we will request the test report from APT rather than pointing you at marketing collateral. If the answer comes back thin, you will get that answer too.

One coverage note while you are planning: we do not deliver to Western Australia or South Australia.

Questions worth asking any turf supplier

• Which fire test has this specific product been through, and can I see the report rather than the badge?
• Is that a flooring flame-spread test or a bushfire construction test?
• What is the infill, sand or rubber crumb?
• Has anything in the system been assessed against AS 3959 in any way?
• Will you put the answer in writing for my certifier?

A supplier who answers "our turf is fire rated" and stops there has not answered any of them.

Practical layout on a bushfire-prone block

Keep a non-combustible border of pavers, exposed aggregate or gravel between the turf and the house wall, particularly under windows and along any wall with a sub-floor vent. The manufacturer already recommends a one metre non-turf border against strongly reflective surfaces for heat reasons, and the same border does useful work here. Use sand infill, keep gutters and the strip beside the turf clear of leaf litter, and keep fire pits and barbecues off the surface entirely, since turf gets hot enough to cause problems long before any flame is involved. If your property carries an APZ condition, check the turf area does not conflict with the fuel management it requires.

Ordering works the same way here as anywhere else. Turf ships in fixed cut lengths, commonly 5m, 10m, 15m or a full 20m roll depending on the product, at a fixed 3.71m roll width, and wide areas are covered by joining rolls at that width. Every product page across the range has a calculator for lengths and quantities, with current pricing shown on the page itself. Our guide to laying artificial turf covers the base and seam work, which is the customer's or their landscaper's job since we supply only.

Frequently asked questions

Can I install artificial grass in a BAL-40 or flame zone property?

Nothing in AS 3959 prohibits it, because the standard governs building construction rather than landscaping. Your constraints will come from any asset protection zone condition on your consent, from council landscaping requirements, and from your insurer. Check those three before you order, and treat any supplier claim of BAL approval for a turf product as a red flag.

Does artificial grass catch fire more easily than natural lawn?

A dry, unwatered natural lawn in late summer is genuinely flammable and carries fire across a yard readily. Synthetic turf tends to melt under ember contact rather than carry flame, though the plastic and any rubber infill add fuel that living grass does not. The comparison shifts with how the lawn is maintained, so there is no clean winner, and neither surface is a firebreak.

Will an ember from a bushfire ruin my turf?

A live ember landing on the pile will melt a small hole in it, and that damage is permanent. Small patches can be cut out and replaced if you keep an offcut, which is a good reason to hang on to any leftover material after install. Widespread ember fall across an area usually means replacing the affected section rather than repairing it.

Do I need to declare artificial grass to my home insurer?

Policies differ on how they treat landscaping and outdoor improvements, and some cover them under a separate limit or not at all, which our guide on home insurance and artificial grass goes through. Turf on a bushfire-prone block is in a category insurers ask questions about, so a quick call to confirm how your policy handles it is worth making before you spend the money rather than after a claim.