How to Effectively Clean Mould Off Walls

Step 1. Identify the Mould and What Is Causing It

The first step is to identify where the mould is and what is causing it. Mould needs three things to grow: warmth, food, and moisture.

Look for signs of water damage like peeling paint, discolouration, or warping. These are all signs that there is too much moisture in the area and mould might be present.

Once you’ve identified where the mould is, you need to figure out what is causing it. Is there a leaky pipe? Is the area near a window where condensation forms? Is there poor ventilation in the room?

Step 2. Prepare a Cleaning Solution

The next step is to prepare your cleaning solution. You can use a bleach and water solution or vinegar.

To make a bleach and water solution:



• Mix one cup of bleach with one gallon of water.
• Pour the solution into a clean spray bottle.

Step 3. Clean the Mould With a Sponge or Cloth

Once you have your cleaning solution, follow these steps for removing mold:

• Wear protective clothing and put on rubber gloves, goggles, and a mask to protect yourself from the fumes.
• Spray the mouldy area with your chosen cleaning solution.
• Let the solution sit for about 15 minutes so it can kill mould.
• Scrub the area with a scrubbing brush to remove the mould.
• Wipe the area down with a clean microfibre cloth or sponge.

Step 4. Rinse off the Cleaning Solution and Allow Walls to Dry

After you’ve scrubbed the mouldy area, it’s important to rinse off the cleaning solution. You don’t want to leave any residue behind because it could lead to more mould growth.

To rinse off the cleaning solution:

• Spray the area with clean water.
• Wipe the area down with a clean cloth or sponge.
• Let the area air dry or use a fan to help speed up the process.

Step 5. Seal Any Cracks or Holes That May Be Allowing Moisture In

Once you're done with mould removal, it’s important to take measures to prevent it from coming back. One of the best ways to do this is to seal any cracks or holes that may be allowing moisture in.



To seal cracks and holes:

• Use caulk to seal any cracks around windows, doors, or baseboards.
• Use weather-stripping around doors and windows to keep cold air from coming in.
• Repair any leaks in your roof, gutters, or pipes.