How to Remove Mould: Effective Tips on How to Get Rid of Mould

Mould is not just a cosmetic issue—it’s a serious problem that can impact your health and damage your home. Whether it’s lurking in your bath or shower, hiding in your laundry, or growing behind your washing machine, mould removal should be a priority. 

Mould spores can trigger respiratory issues, particularly for those sensitive to allergens, asthma sufferers, or those with weakened immune systems. In damp environments where ventilation is poor, mould thrives. This guide will walk you through how to get rid of mould, identify signs of mould growth, and implement effective mould prevention methods.

Can You Get Rid of Mould Yourself, or Should You Call an Expert?

In some cases, removing mould can be a simple DIY task. However, certain situations may require the expertise of a mould remediation professional. Consider calling in an expert when:

• The mould covers more than 1 square metre.
• Black mould (Stachybotrys chartarum) is present, which is toxic and requires professional handling.
• Structural damage has occurred due to prolonged mould growth.
• You or someone in your household is sensitive to mould spores, or has respiratory conditions that could be aggravated by mould removal.

If the mould problem is small and on the surface, you can tackle it yourself by following the steps below.

How to Identify Mould in Your Home

Before you start the removal of mould, it’s important to determine where the mould is growing. Not all mould is visible, and sometimes mould spores can lurk in hidden areas. Here are some common signs:

• Musty smell: A persistent damp or earthy smell is a sign of mould.
• Visible growth: Patches of black, green, or white growth on tiles, walls, or ceilings are clear signs of mould.
• Damp areas: Bathrooms, basements, and areas under sinks are hotbeds for mould growth.
• Health symptoms: Increased coughing, sneezing, and respiratory problems can indicate the presence of mould spores in the air.

The Difference Between Mould and Mildew

People often confuse mould with mildew, but they are not the same. Mildew is a surface fungus that’s easier to clean and typically grows flat and white. Mould, however, penetrates deeper into materials, making it harder to remove. Mould can appear as black mould, green, or brown, and is often slimy or fuzzy.

Different Types of Mould and Why you Should Get Rid of it

There are various types of mould that can grow in homes, each posing different risks. Toxic mould, like black mould (Stachybotrys chartarum), is infamous for producing mycotoxins, which can lead to severe health issues, particularly in individuals with compromised immune systems. Green mould, which includes species like Aspergillus and Penicillium, is less harmful but can still cause respiratory problems, especially after prolonged exposure to mould.

These mould species thrive in moist environments, feeding on organic materials like wood, fabric, and paper. Identifying and understanding the different types of mould is crucial because each mould feeds differently and requires specific cleaning methods. Knowing where to find mould—such as damp basements, behind wallpaper, or in poorly ventilated areas—can help homeowners address infestations before they become a larger issue. Properly managing the environment can prevent many mould species from taking root in your home.

Tools and Supplies for Mould Removal

To safely get rid of mould, you’ll need the following:

• White vinegar: A natural solution that kills mould spores.
• Bleach: For tougher mould stains and deep cleaning.
• Baking soda: For cleaning mould and absorbing odours.
• Microfibre cloth: To wipe surfaces without spreading mould.
• Scrubbing brush or toothbrush: For small or hard-to-reach areas like tile grout.
• Dehumidifier: Helps remove moisture from the air, preventing future mould growth.
• Exhaust fan: Essential in high-moisture areas to maintain proper ventilation.

Step-by-Step Guide to Removing Mould and Stopping Mould Growth

1. Prepare the Area

Before you begin, make sure the area is well-ventilated. Open windows, wear protective clothing, and use a microfibre cloth to cover air ducts and doorways to prevent the spread of mould spores to other areas.

2. Apply a Cleaning Solution

For smaller areas, a solution of vinegar and water works well. Spray it directly onto the mouldy surface and let it sit for 15 minutes. For tougher mould problems, a mix of 1 cup of bleach and 1 gallon of water can be used. Ensure the area is well-ventilated while using bleach.

3. Scrub the Mould Away

Using a scrubbing brush or toothbrush, scrub the affected area thoroughly. For areas like bathroom tiles, grout, and shower stalls, the small toothbrush can reach tight spaces. Continue scrubbing until the mould is removed.

4. Rinse and Dry the Area

Once you’ve scrubbed away the mould, use a microfibre cloth to wipe the area down. Rinse with clean water and dry the area thoroughly. If any moisture remains, it can lead to mould growing back.

5. Repeat if Necessary

Sometimes, the first cleaning session won’t completely remove stubborn mould. If you notice traces of mould reappearing, repeat the cleaning process.

How to Remove and Treat Mould from Walls, Floors, and Ceilings

Different surfaces require different approaches to mould removal:

• Tiles and Grout: Use a mix of bleach and baking soda to scrub away mould in between tiles and grout lines.
• Painted Walls: Be gentle to avoid damaging the paint. Use a vinegar solution or a mild detergent.
• Drywall: If the mould has penetrated the surface, you may need to replace the drywall. In severe cases, it’s best to call a professional.

How to Help Prevent Mould in the Long Term

Once you've successfully removed the mould, preventing it from returning is crucial. Here are some key prevention strategies:

• Control Humidity: Use a dehumidifier in damp areas like the bathroom and basement. Aim to keep indoor humidity below 60%.
• Fix Leaks: Regularly check for leaks under sinks, around windows, and in the roof. Any source of moisture can create the perfect environment for mould to grow.
• Improve Ventilation: Run an exhaust fan in the bathroom during and after showers to reduce moisture. Ensure your home has adequate ventilation such as include leaving the windows opens.
• Use Mould-Resistant Products: Consider using mould-resistant paint in high-moisture areas like bathrooms and kitchens.
• Wipe Surfaces Regularly: After showers or cooking, wipe down any wet surfaces to stop mould from forming.

Extra Tips for Tackling Stubborn Mould

For particularly stubborn mould:

• Hydrogen Peroxide: This can be used on non-porous surfaces to kill mould spores without harsh chemicals.
• Baking Soda: Use baking soda as a gentle abrasive to scrub away surface mould.
• Proper Storage: Keep bathroom cabinets and under-sink areas well-organised to prevent moisture build-up.

The Importance of Airflow in Preventing Mould

Proper airflow is essential in preventing mould growth. Stagnant air allows moisture to accumulate, which in turn promotes the growth of mould spores. Ensure your home has good ventilation by running fans, opening windows, and keeping exhaust fans in working order.

Final Thoughts

Mould is persistent, but with the right tools and knowledge, you can successfully get rid of mould in your home. Remember that prevention is key, so always keep your home dry, fix leaks, and maintain proper ventilation to avoid future mould growth. If the mould problem is severe or involves black mould, it’s best to call in a professional for mould remediation.

Frequently Asked Questions

1. What health problems can mould cause?

Mould can cause respiratory problems such as coughing, wheezing, and throat irritation. Prolonged exposure to mould spores can lead to more severe conditions, especially in individuals with asthma, allergies, or compromised immune systems. Mould is common in damp environments, and inhaling the spores into the air can trigger allergic reactions and worsen pre-existing conditions.

2. What is the difference between mould and mildew?

While both mould and mildew are types of fungi, mildew is usually white or grey and grows on the surface of moist areas. In contrast, mould can be black, green, or brown and can penetrate deeper into surfaces like walls and ceilings. Mould can cause more structural damage and health issues than mildew, and it’s crucial to remove any mould you find quickly.

3. What are the main causes of mould growth in homes?

The primary cause of mould is excessive moisture in your home, whether from water leaks, condensation, or high humidity. Poor ventilation, such as in shower recesses or areas near a bathroom window, can also trap moisture, allowing mould to grow and spread. Fixing leaks and improving ventilation are key steps in preventing mould from returning.

4. How can I prevent mould from returning after cleaning?

To prevent mould from returning, it’s important to address the moisture source. Use a dehumidifier to lower humidity, fix leaks, and ensure proper ventilation. Regularly clean areas of mould such as kitchens, bathrooms, and basements, and use mould-resistant paints. After cleaning, make sure to wipe the mould off completely, dry the area, and let the solution you’re using sit for long enough to kill the spores.

5. Is it safe to use bleach to kill mould?

Yes, you can use bleach to kill mould, especially on non-porous surfaces. To effectively bleach the mould, mix a solution of one cup of bleach with water, apply it to the affected area, and let it sit for at least 15 minutes before scrubbing. However, bleach is less effective on porous materials where the mould gets its grip deeper into the surface.

6. How can I stop mould from spreading during cleaning?

To stop mould from spreading, keep the area well-ventilated and wear protective clothing. Avoid using fans, as they may flick spores into the air, causing the mould to spread. Seal off the area with plastic sheeting and clean thoroughly with a solution designed to kill mould. Wipe the mould off surfaces carefully to prevent further contamination.

7. How can I find mould in hard-to-reach areas?

Mould can often be hidden behind walls, under carpets, or in areas with little airflow. To find mould, check for musty odours, discoloured patches, or damp spots, particularly around plumbing, bathroom windows, or in corners. If you suspect hidden mould, consider calling a mould expert to inspect your home.

8. Can mould cause permanent damage to my home?

Yes, mould may cause structural damage if it’s allowed to grow unchecked. It can weaken walls and ceilings, damage wood, and even destroy insulation. This is why removal of mould is crucial as soon as you notice its presence. Regularly checking and keeping your home clean helps prevent mould from getting a foothold.

9. How does moisture affect the spread of mould?

Moisture is essential for mould to thrive. When excess moisture in your home is present due to leaks, high humidity, or condensation, it creates the perfect environment for mould to grow. Areas like shower recesses and damp basements are especially vulnerable. To prevent mould growth as well, control the humidity and ensure proper ventilation.

10. How do I know if the mould is no longer present after cleaning?

After cleaning, inspect the area for any remaining stains or musty smells. If mould is no longer visible or detectable by smell, it’s likely gone. However, to ensure complete mould removal, keep the area dry and monitor it over the next few weeks. Use fans and dehumidifiers to prevent moisture buildup.

References: 

1. CHOICE - A comprehensive guide on how to effectively use vinegar and bleach to remove mould, including expert advice on choosing cleaning methods. Read more here.
2. EPA - This guide provides detailed tips on mould cleanup techniques, highlighting when to call a professional and the health risks associated with mould exposure. Check the guide.
3. Better Health Channel - This government health site covers mould's impact on health, tips on prevention, and when to seek professional help. It can be referenced to back up health-related statements in your blog. View the site.
4. NSW Health - Offers a local Australian perspective on dealing with mould, including health warnings and prevention methods specific to humid climates Learn more.
5. National Asthma Council Australia - Provides advice on how mould can affect people with respiratory issues like asthma.  Read more here.
6. Mayo Clinic - This site explains the symptoms of mould exposure and health effects. Check it out here.
7. Queensland Government - Health Information - Provides official guidance on mould prevention and removal, including health considerations, tailored for Queensland residents. Learn more.