Severe flooding in North Queensland, particularly in Ingham, Townsville, and nearby areas, has left many homes dealing with excess moisture and rapid mould growth.
With the region’s high humidity and warm climate, mould can begin forming within 24 to 48 hours after floodwaters recede.
The government warns that rainfall will continue to pour with major flood warnings being released to many different towns and suburbs in North Queensland.
According to Queensland Health, exposure to mould can cause respiratory issues, skin irritation, fatigue, and worsened asthma symptoms. If left untreated, mould can lead to structural damage, poor indoor air quality, and ongoing health concerns.
If your home has been affected by flooding, follow these essential mould removal steps to restore your home and prevent further damage.
📢 PREVENTION TIPS: How to prevent mould after flood or heavy rain
1. Remove standing water and excess moisture immediately
Before tackling mould, it’s crucial to eliminate all excess moisture.
- Pump out floodwater using a sump pump, wet vacuum, or mop.
- Improve airflow by opening windows, doors, and vents to increase ventilation.
- Use dehumidifiers and fans reduce indoor moisture, control humidity, and improve ventilation to prevent mould regrowth.
- Turn on air conditioning (if safe) to help remove excess humidity.
📢 EXPLORE: How dehumidifiers get rid of mould
2. Remove and dispose of flood-damaged materials
Flood-damaged materials can’t always be salvaged and may harbour mould spores. Mould experts recommend disposing of any water-damaged items that cannot be completely dried.
- Tear out waterlogged materials: Plasterboard, carpets, and insulation should be removed if damp for over 48 hours.
- Discard porous items: Upholstered furniture, mattresses, and rugs may need to be thrown out.
- Check for hidden damp spots: Mould can grow behind furniture, under floorboards, and inside cupboards.
If an item remains wet for more than 48 hours, it should be discarded.
3. Deep clean and disinfect mould-infested areas
Once flood-damaged materials are removed, it’s time to deep clean all surfaces.
- Vacuum with a HEPA filter: This removes mould spores, dust, and debris from floors and walls.
- Scrub all surfaces: Use either a mild detergent, white vinegar solution (4:1 water-to-vinegar ratio), or a 10% bleach solution.
- Keep the area ventilated: Open doors and windows while cleaning to prevent mould spores from settling elsewhere.
CHOICE recommends: “Scrubbing with vinegar or bleach is necessary to prevent mould from spreading.”
4. Dry your home thoroughly to stop mould regrowth
Even after cleaning, moisture trapped in walls and floors can cause mould to return.
- Use dehumidifiers: According to the Commonwealth Scientific and Industrial Research Organisation (CSIRO), dehumidifiers effectively lower humidity levels, making conditions less favourable for mould.
- Increase airflow: Position fans, air movers, or heaters to speed up the drying process.
- Monitor humidity levels: Sensitive Choice recommends keeping indoor humidity between 30 to 50%.
📢 READ MORE: How dehumidifiers get rid of mould
5. Take additional steps to protect yourself from mould
Some mould growth may persist even after initial cleaning. If necessary, follow these extra steps:
- ✅ Apply anti-mould sprays – Use hydrogen peroxide or specialised mould-killing solutions.
- ✅ Steam clean non-removable materials – Steam kills deep-rooted mould in tiles, walls, and flooring.
- ✅ Use air purifiers with HEPA filters – These help remove airborne mould spores and improve air quality.
- ✅ Monitor for regrowth – Check surfaces weekly for any signs of new mould spots.
6. Protect yourself while removing mould
Cleaning mould can expose you to harmful spores. Take precautions to protect your health.
- Wear PPE: WorkSafe QLD recommends using P2/N95 masks, gloves, and protective eyewear while cleaning.
- Avoid dry brushing mould: This can release spores into the air—instead, use damp cloths or sponges.
- Seal affected areas while cleaning: Prevent mould from spreading by containing the work area.
7. Maintain low humidity to prevent mould returning
Long-term humidity control is key to keeping your home mould-free.
- Use exhaust fans in kitchens and bathrooms to reduce condensation.
- Monitor humidity with a hygrometer and keep it below 50%.
- Use dehumidifiers regularly to prevent excessive moisture buildup.
Take action to remove mould effectively
Mould growth after flooding is a serious issue that requires immediate attention. By following these removal steps, you can restore your home and prevent health hazards.
✔ Remove excess moisture quickly
✔ Dispose of flood-damaged items
✔ Clean and disinfect all surfaces
✔ Dry out your home completely
✔ Take extra steps to eliminate stubborn mould
✔ Control humidity with dehumidifiers to prevent regrowth
By acting fast, you can eliminate mould effectively and prevent it from returning. Stay safe and protect your home today!
LEARN MORE: The beginner’s guide to choosing the right dehumidifier
