Black mould grows in damp, humid conditions, especially in areas with poor ventilation.
You’ll often find it in:
- Bathrooms with little airflow
- Kitchens where steam builds up
- Walls affected by leaks, rising damp, or condensation
To get rid of mould for good, you need to fix the underlying moisture problem — otherwise, it will come back.
Is black mould dangerous?
Yes — black mould can affect both your health and your home if left untreated.
Over time, it can cause respiratory issues and damage walls, ceilings, and floors.
Health effects of black mould can include
- Breathing problems like coughing or wheezing
- Skin irritation
- Worsening of asthma or allergies
Can black mould damage your home?
Mould can also damage your home over time, affecting walls, ceilings, and even flooring if the moisture problem isn’t fixed.
If mould keeps coming back, it may be a sign of underlying damp.
Book a free damp survey to get expert advice and a long-term solution.
How to remove black mould from walls (step by step)
You can remove black mould from walls yourself, but it’s important to do it properly to stop it coming back.
Step 1: Protect yourself
Before you start, make sure you have basic protection:
- A disposable mask
- Gloves
- Long sleeves if possible
Step 2: Find the source of moisture
Check where the moisture is coming from:
- Leaks in pipes or roofs
- Condensation on windows or walls
- Signs of rising damp.
Step 3: Clean the affected area
For hard surfaces:
- Mix white vinegar and water
- Apply to the mould and leave for 30–60 minutes
- Scrub and wipe clean
For porous materials:
- Remove badly affected materials if needed
- Seal surfaces after cleaning
Natural remedies like vinegar or baking soda can help in small areas, but they won’t fix the underlying moisture problem.
Mould often comes back when the underlying moisture problem hasn’t been fixed.
This could be due to poor ventilation, hidden leaks, or damp inside your walls.
If mould keeps returning after cleaning, it’s usually a sign of a deeper damp issue.
Book a free damp survey to get expert advice and a long-term solution — with no obligation.
When to call a professional
- Mould covering a large area
- Mould keeps coming back after cleaning
- Health symptoms are getting worse
Black Mould Health Risks: Why You Should Act Now
Black mould can affect both your home and your health, especially if left untreated.
Taking action early helps prevent more serious problems.
Long-term exposure to mould can lead to breathing issues, allergies, and other health problems.
Look out for warning signs such as:
- Musty odours.
- Dark spots spreading on walls or ceilings.
- Persistent dampness in specific rooms.
Conclusion
Black mould doesn’t have to be a long-term problem. The key is removing it properly and fixing the cause to stop it coming back.
If you’re dealing with recurring mould, a professional damp survey can help identify the issue and provide a long-term solution.