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Your Ultimate Guide to Building Design and Construction: Tips and Help for All Builders

Embarking on a building project, whether it's designing a new home, starting a construction business, or taking on a kit home, is an exciting but challenging endeavor. At House Plans Shop, we are committed to providing valuable insights and support for builders at every stage. In this comprehensive guide, we offer building design tips, startup advice, and help for kit home builders and owner-builders.

Preventing Mould in the Bathroom: 6 Important Tips

Updated: Jul 9

Mould is a common problem in bathrooms, particularly in damp spaces with poor ventilation. It's not just about looks—it can also affect your health. To keep your bathroom clean and mould-free, follow these six tips that really work. By managing moisture levels, cleaning regularly, and improving air circulation, you can create an environment that's less hospitable to mould. 

These steps are simple but effective in maintaining a healthy and pleasant bathroom atmosphere. Taking these precautions can save you time and effort in the long run, ensuring your bathroom stays fresh and mould-free for you and your family to enjoy.

1. Ensure Proper Ventilation

  • Effective Ventilation: Proper ventilation is essential to stop mould growth. Installing and operating exhaust fans effectively lowers moisture levels post-showers and baths. It's vital that the fan vents outside, not into the attic, to prevent moisture buildup. This helps maintain a dry and mould-free environment in your bathroom.

  • Natural Ventilation: Opening windows whenever you can is a great way to let fresh air circulate through your bathroom. This simple step helps to dry up excess moisture and lower humidity levels effectively.

2. Fix Leaks Promptly

  • Leaking Shower Heads: One frequent cause of moisture in bathrooms is a leaking shower head. It's important to tackle leaks promptly by tightening fittings or replacing washers as needed. If leaks persist, it may be wise to contact emergency plumbers who can professionally resolve the issue and prevent further water damage.

  • Check for Hidden Leaks: Regularly check around sinks, toilets, and pipes for signs of leaks. Accumulated water in these areas can greatly promote mould growth, which can be harmful. Keeping these areas dry and fixing leaks promptly helps prevent mould from becoming a problem.

3. Use a Bathroom Fan or Dehumidifier

  • Bathroom Fan: Investing in a good bathroom fan is essential. Use it while bathing and for a while afterwards. This removes extra moisture from the air, stopping the dampness that mould loves to grow in. Keeping your bathroom dry reduces the risk of mould forming, ensuring a cleaner and healthier environment.

  • Dehumidifier: In particularly humid climates or bathrooms with limited airflow, a dehumidifier can greatly lower moisture levels. It works by extracting excess humidity from the air, helping to prevent issues like mould and dampness. This simple appliance is easy to use just plug it in and let it work quietly in the background, improving comfort and maintaining a healthier environment in your bathroom.

4. Clean and Dry Surfaces Regularly

  • Regular Cleaning: Regularly clean bathroom surfaces like tiles, bathtubs, sinks, and floors to keep them free from mould. Use a mildew-resistant cleaner or a solution of vinegar and water for effective cleaning. This helps remove any existing mould and prevents it from coming back, ensuring your bathroom stays clean and hygienic.

  • Dry Surfaces: After showering or bathing, it's important to wipe down wet surfaces like walls, shower doors, and sinks. This helps keep these areas dry, which prevents mould from growing. By regularly drying surfaces after use, you can effectively inhibit the growth of mould in your bathroom.

5.Use Mould-Resistant Products

  • Mould-Resistant Paint: Consider using mould-resistant paint on bathroom walls and ceilings. These paints have special additives that help prevent mould growth, which is particularly useful in damp areas like bathrooms. By choosing mould-resistant paint, you can keep your bathroom walls and ceilings looking clean and free from mould, even in humid conditions. This proactive approach helps maintain a healthier environment and reduces the need for frequent cleaning and maintenance.

  • Mould-Resistant Caulk: To prevent mould, apply mould-resistant caulk around sinks, tubs, and showers. Check and replace old or cracked caulk regularly to keep moisture out and maintain a protective barrier against dampness. This simple maintenance helps to safeguard your bathroom from mould growth, ensuring a cleaner and healthier environment

6. Monitor Humidity Levels

  • Use a Hygrometer: To maintain a comfortable bathroom environment, use a Hygrometer to monitor humidity levels. According to Safe Work NSW, “optimum relative humidity levels are between 40% and 70%. If levels go higher, enhance ventilation or think about using a dehumidifier to control moisture better. Taking these measures ensures a drier, more pleasant bathroom space, reducing the risk of mould and keeping the air fresher for longer periods.

  • Air Circulation: Encourage air circulation throughout the bathroom by leaving doors open whenever possible. This simple action helps to disperse moisture and prevents the air from becoming stagnant. Proper air circulation is crucial for maintaining a fresh and dry environment, which can significantly reduce the chances of mould and mildew growth. By keeping the doors open, you allow fresh air to flow in and out, ensuring that your bathroom stays clean and hygienic.


By following these six important tips, you can effectively prevent mould growth in your bathroom. Regular maintenance is crucial to keep everything in working order. Prompt repairs of leaks, proper ventilation, and using mould-resistant products are key to maintaining a clean and mould-free bathroom environment. Always ensure that your bathroom is well-ventilated by using fans or opening windows. For more complex plumbing issues like leaking shower heads, consider consulting emergency plumbers. They can ensure thorough repairs and prevent further moisture-related problems, helping to keep your bathroom in the best condition possible.


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