Top tips for preparing your home for bushfire
Large parts of Australia are currently facing extreme bushfire conditions. So, those of us living in bushfire-prone areas turn to our own backyards to make sure we are doing everything we can to safeguard against bushfire risk.
No property can ever be 100 per cent safe from bushfire. But there are some simple ways to give you and your home the best chance of avoiding harm.
We spoke to one of our bushfire experts, Justin Leonard, to get his top tips for making your home bushfire-ready. Justin has decades of experience in understanding how we can manage bushfire risk to life and infrastructure.
Fire researchers investigate a property at Strathewen that survived the Black Saturday bushfires. Credit: Nick Pitsas
Tip 1: Your house can be at risk even if it isn’t directly exposed to bushfire
At least 85 per cent of houses are destroyed without experiencing direct exposure to flames or significant radiation from a bushfire front. For these houses, ember attack and low-level surface fire either directly ignites or enters the house. Or fire ignites nearby combustible elements that then threaten the house. So even if your house doesn’t directly border bushland, it is still important you do everything you can to safeguard it.
Tip 2: Clear your house of excess mulch
Mulch is one of the worst materials to have near a house. It is very difficult to extinguish and easily transports low-level surface fire to buildings near the ground. Fire has destroyed houses well after the front had passed when mulch, previously thought to have been extinguished, reignited. Radiant heat from mulch beds next to houses can be enough to break windows and ignite timbers.
Tip 3: Trees can actually help mitigate fire risk
Trees mitigate wind and embers as well as reducing the rate the landscape surrounding your home dries out. Removal of trees promotes the growth of the previously shaded undergrowth. This increases the rate of spread and severity of a fire. It also reduces wind protection on your house which can weaken it to ember attack and surface fire.
However, trees or limbs that overhang or can fall on a house, water tank or fire pump are a risk. This is due to either falling over or causing a build-up of debris.
Tip 4: Check your yard thoroughly for hazards
The following items can all create a risk in your yard:
- trees, including fallen tree limbs
- gas bottles
- stored firewood
- outdoor furniture
- containers of volatile fuels like petrol, farm chemicals, paint and solvent liquids stored below gapped verandas and timber decks.
Embers or fine fuel can ignite timber fences, retaining wall sleepers, steps, decks, firewood, and posts, leading to the destruction of a house. CCA-pressure treated pine is particularly vulnerable.
Tip 5: Even if you’re leaving early you should still prepare your house for fire as best you can
Fuel on a property creates a risk for neighbours – and the wider community. Reducing fuel improves the chances of a house surviving a bushfire.
A fire starting in, or spreading into, a property can destroy the house and other outbuildings.
Depending on how far you are from your neighbours, the burning building then provides a radiant heat source to a neighbour’s house. This leads to a widespread impact, like a set of dominos. Many of the houses destroyed in recent bushfires were a result of house-to-house ignition (e.g. Canberra 2003, Marysville 2009, Wye River 2015). One person’s fuel is another person’s risk.
Remember, you can never be 100 per cent safe from bushfire. These measures, like all other risk reduction actions, address some, but not all the weak links a bushfire may exploit. They form part of a risk management strategy but are not completely effective on their own in preventing house loss. Read more from Justin Leonard as he busts myths and misconceptions about bushfires in Australia
CSIRO is an Australian authority on fire management, behaviour and prediction. We provide training to all state fire agencies to better understand and manage bushfires.
Justin leonard, Nick Kachel 18 December 2019 on CSIRO