How to Remove Black Mould

Black mould is a common household issue that can cause serious health problems if left unaddressed. This article aims to provide you with a comprehensive guide on how to remove black mould effectively. By following the steps and tips outlined in this article, you can ensure a safe and healthy living environment for you and your family. Visit to learn more.

Key Takeaways:

  • Black mould, or Stachybotrys chartarum, thrives in damp and humid conditions, typically appearing in poorly ventilated areas.
  • Recognise the signs of black mould infestation, including visible patches, musty odour, allergy-like symptoms, and water damage.
  • Take safety precautions, such as wearing protective gear, containing the area, and ensuring proper ventilation before removing black mould.
  • Gather the necessary tools and supplies, including protective gear, scrub brush, mould removal cleaner, and bleach or hydrogen peroxide.
  • Prepare the area by clearing space, covering nearby objects, and turning off HVAC systems.
  • Clean the mouldy surfaces by applying the mould removal cleaner, scrubbing the area, and wiping away mould and excess moisture.
  • Repeat the cleaning process if necessary until the surface is free from mould.
  • Prevent future mould growth by controlling moisture levels, fixing leaks promptly, regularly cleaning and drying surfaces, and replacing mould-prone materials.
  • Black mould can pose health risks, especially for individuals with respiratory conditions, allergies, or weakened immune systems.

mould removal

How Does Black Mould Form?

Black mould, also known as Stachybotrys chartarum, thrives in damp and humid conditions. It often appears in areas with poor ventilation, such as bathrooms, basements, and kitchens. When excessive moisture combines with organic materials like dust or wood, it creates an ideal environment for black mould to grow and spread.

Recognising the Signs of Black Mould Infestation

Before we dive into the process of removing black mould, it’s crucial to be able to recognize the signs of an infestation. Look out for the following indicators:

  1. Visible black or dark green patches: Black mould usually appears as slimy patches on walls, ceilings, or other surfaces.
  2. Musty odor: A strong, musty smell is a telltale sign of mould growth.
  3. Allergy-like symptoms: Black mould can trigger allergic reactions, including sneezing, coughing, itchy eyes, and respiratory issues.
  4. Water damage: If your home has experienced water leaks or flooding, there’s a higher risk of black mould growth.

Safety Precautions Before Removing Black Mould

When dealing with black mould, it’s essential to take appropriate safety precautions to protect yourself and minimize the risk of exposure. Here’s what you need to do:

  • Wear protective gear: Put on gloves, goggles, and a respirator mask to shield yourself from mould spores.
  • Contain the affected area: Seal off the area with plastic sheets and duct tape to prevent the spread of mould spores to other parts of your home.
  • Ensure proper ventilation: Open windows and use fans to improve airflow and reduce moisture levels while working on removing the mould.

How to Remove Black Mould Safely and Effectively

Step 1: Gather the Necessary Tools and Supplies

To remove black mould effectively, you’ll need the following tools and supplies:

  • Protective gear: Gloves, goggles, and a respirator mask.
  • Plastic sheets and duct tape: For containment purposes.
  • Scrub brush: To remove mould from surfaces.
  • Mould removal cleaner: Look for a product specifically designed to eliminate black mould.
  • Bleach or hydrogen peroxide: These can be used as natural alternatives to commercial mould cleaners.
  • Spray bottle: For applying cleaning solutions.
  • Sponge or cloth: To wipe away mould and excess moisture.

Step 2: Prepare the Area

Before you begin cleaning, ensure the area is ready for the mould removal process:

  • Clear the space: Remove any furniture, curtains, or other items near the affected area to provide easy access.
  • Cover nearby objects: Use plastic sheets or old newspapers to protect nearby objects from cleaning solutions.
  • Turn off HVAC systems: Prevent the spread of mould spores by turning off heating, ventilation, and air conditioning systems in the vicinity.

Step 3: Clean the Mouldy Surfaces

Now it’s time to tackle the black mould on the surfaces. Follow these steps:

  • Apply the mould removal cleaner: Spray the cleaner directly onto the mouldy surface. Allow it to sit for a few minutes to penetrate the mould.
  • Scrub the area: Use a scrub brush to remove the mould from the surface. Work in circular motions, applying moderate pressure.
  • Wipe away mould and excess moisture: Use a damp sponge or cloth to wipe away the loosened mould and excess moisture. Rinse the sponge or cloth frequently to prevent recontamination.
  • Repeat the process if necessary: For stubborn mould stains, repeat the cleaning process until the surface is free from mould.

Step 4: Preventing Future Mould Growth

Removing black mould is only part of the solution. To prevent its return, follow these preventive measures:

  • Control moisture levels: Keep humidity below 50% by using dehumidifiers or air conditioners and ensuring proper ventilation in damp areas.
  • Fix leaks promptly: Repair any plumbing leaks or water damage as soon as possible to prevent mould growth.
  • Regularly clean and dry surfaces: Regularly clean and dry surfaces prone to moisture, such as bathroom tiles, shower curtains, and window sills.
  • Remove mould-prone materials: If certain items or materials consistently develop mould, consider replacing them with mould-resistant alternatives.


Is black mould dangerous to my health?

Yes, black mould can pose health risks, especially for individuals with respiratory conditions, allergies, or weakened immune systems. It’s crucial to address mould infestations promptly.

Can I remove black mould with bleach?

Bleach can be effective in killing mould on non-porous surfaces. However, it may not be as effective on porous materials. Consider using commercial mould removal products or natural alternatives like hydrogen peroxide.

What are the long-term effects of black mould exposure?

Prolonged exposure to black mould can cause respiratory issues, allergic reactions, and even neurological problems. It’s crucial to address mould infestations promptly to avoid long-term health complications.

Can I remove black mould myself, or should I hire professionals?

Minor mould infestations can often be tackled by homeowners using the right safety precautions and cleaning techniques. However, for extensive or recurring mould problems, it’s advisable to consult professional mould remediation services.

Are there any natural alternatives to commercial mould cleaners?

Yes, natural alternatives like vinegar, hydrogen peroxide, and baking soda can be effective in removing black mould. However, they may not be as potent as commercial mould removal products.

How can I prevent black mould growth in my home?

To prevent black mould growth, control moisture levels, fix leaks promptly, ensure proper ventilation, and regularly clean and dry moisture-prone areas.


Black mould can be a serious issue that requires immediate attention. By following the steps and tips outlined in this article, you can effectively remove black mould and prevent its recurrence. Remember to prioritise safety, take necessary precautions, and address any moisture-related issues in your home promptly. A clean and mould-free environment will contribute to the well-being of you and your loved ones.