Sometimes mould grows in your bathroom and is an unwelcome housemate that tends to overstay its welcome. Beyond being unsightly, it can pose significant health problems too. At Canberra Plumbing & Drains, we have all the tips and tricks to arm you with the knowledge and tactics to remove mould for good.

Understanding Bathroom Mould

Due to the country’s warm and humid climate, bathroom mould, often appearing as a dark, slimy or powdery organic matter, is a common issue in homes across Australia. Mould spores thrive in moist environments, and bathrooms serve as the perfect breeding ground due to the condensation from hot showers and baths.


If you suspect the presence of black mould, or Stachybotrys chartarum, it’s crucial to seek professional help for testing and removal, as this type of mould poses severe health issues.

Causes of Bathroom Mould

Humidity and Condensation

Warm, humid conditions in the bathroom create an ideal environment for mould growth. Whether it’s from hot baths, showers or even the sink, the steam generated leads to condensation on walls, ceilings, tiles and grout.

Poor Ventilation

Bathrooms with inadequate ventilation are more likely to harbour mould spores. Without proper air circulation, moisture from hot water steam settles on surfaces, promoting mould growth.

Our Top DIY Tool Choices to Get Rid of Mould

When it comes to removing mould, some cleaning products can make the task easier and more effective.

DIY Solutions

  • Baking Soda Solution: Dissolve 6 grams of baking soda in 1 litre of hot water and apply this mixture to the mould.
  • Vinegar: Apply undiluted vinegar to the mould, leave for a while, then rinse with warm water.
  • Diluted Bleach: Mix 25ml of bleach with 1 litre of water and apply it to the mould.

Commercial Cleaning Products

Products like a HG mould spray can be effective for removing mould. The product should be applied using a spray bottle onto the mould from a distance of 3-5 cm, left for 30 minutes, and then wiped clean with a cleaning cloth and warm water.

Top Tips for Cleaning Mould from Bathroom Surfaces

Bathroom mould can find its way onto various surfaces, each requiring a different cleaning approach.

Removing Mould Spores From Bathroom Ceilings

Spray your chosen mould removal product onto the ceiling and leave it to work for about 30 minutes before wiping it off. Wear gloves and eye protection, and ensure you have adequate ventilation if using chemicals.

Remove Mould From Bathroom Walls

The same method can be used to clean and kill mould that grows on walls. However, if your bathroom walls are tiled, the mould may adhere more firmly to the grout. In such cases, use an old toothbrush for a more thorough cleaning.

Clean Mould From Bathroom Tiles

Scrub the tiles with your chosen solution and leave it for a few minutes before wiping clean. There’s no need to rinse the solution, but do ensure to dry the floor thoroughly to prevent the mouldy grout from returning.

Cleaning Mould From Showers

Remove mould by applying a chosen spray to the shower head, taps, and other affected areas. Leave the solution for 30 minutes and then wipe it clean.

Preventative Measures for Wet Areas

Prevention Tactics for Mould

Maintain Good Ventilation

Prevent mould growth by ensuring your bathroom is well-ventilated. You can do this by:

  • Installing exhaust fans to actively remove moisture.
  • Using a dehumidifier to control the air moisture levels.
  • Opening a bathroom window, especially after hot showers or baths, to let out steam.

Regulate Humidity Levels

  • Aim to keep your bathroom’s humidity levels between 30 and 50 per cent.
  • Use a hygrometer to monitor the humidity accurately.
  • Consider using a humidistat-equipped exhaust fan, which automatically turns on when humidity levels rise.

Regular Cleaning

  • Clean your bathroom regularly with products that kill mould.
  • Focus on moisture-prone areas, such as tile grout, shower corners, and around the sink.
  • Natural solutions like vinegar or baking soda can also effectively remove or prevent mould.

Use a Squeegee

  • After showering or bathing, use a squeegee on your shower walls and doors.
  • This simple action can significantly reduce the moisture that contributes to mould growth.

Fix Leaks Promptly

  • Be vigilant about leaks in your bathroom.
  • Fix any water leaks or drips immediately, as they can lead to moisture accumulation, and mould grows in the affected area.

Regularly Wash Bathroom Textiles

  • Wash wet towels, bath rugs, and shower curtains at least once a week.
  • Use hot water and a mould-killing laundry detergent if possible.
  • Ensure they are completely dry before reusing or hanging them back.

Additional Tips

Proper Storage of Products

  • Avoid leaving wet items like loofahs, bottles, and toys in the shower.
  • Store them in a dry area to prevent mould growth.

Seal Grout Lines

  • Periodically seal the grout lines in your shower and on bathroom floors.
  • This prevents moisture from seeping into porous grout and helps prevent mould feeds.

Use Moul-Resistant Products

  • Use mould-resistant shower curtains, liners, and bath mats in your wet areas.
  • These products are designed to resist mould and are easier to clean.

Inspect and Clean Vents

  • Regularly inspect and clean your bathroom vents.
  • Clogged vents can lead to poor ventilation, which can cause a build-up of mould spores.

By following these comprehensive tactics, you can effectively prevent mould growth in your bathroom and maintain a healthier living environment.

Bathroom Mould: A Battle Worth Fighting

While dealing with bathroom mould might feel like a never-ending battle, it’s one worth fighting. Regular cleaning, proper ventilation, and swift action at the first sign of mould can keep your bathroom a clean, healthful space. Being proactive and ensuring you remove mould as soon as you spot it, will help keep your wet areas free from mildew and mould.

Remember, if the issue becomes extensive or you identify the presence of black mould, it’s best to seek professional help for safe and effective removal. 

At Canberra Plumbing & Drains, we understand the importance of properly functioning bathroom plumbing, so we recommend contacting our mould removal specialist team, who can help you get rid of mould and continue to share our best tips to keep it away.