Many homeowners discover black mould on walls or ceilings and wonder if simply painting over it will solve the problem.

The short answer is no — painting over mould does not fix the underlying issue and will not stop it from returning.

What Happens If You Paint Over Mould?

If you apply standard paint over black mould:

• The mould will continue growing underneath
• Stains may bleed through the paint
• The problem may worsen over time
• Moisture remains trapped

Paint does not kill mould spores. It only temporarily hides the visible marks.

Why Mould Comes Back After Painting

Mould grows because of moisture. If you do not remove the mould and fix the damp source first, it will return through the paint layer.

Common causes include:

• Condensation
• Poor ventilation
• Leaks
• Cold walls

Unless these issues are addressed, repainting alone is ineffective.

Is There Such a Thing as Anti-Mould Paint?

Yes, anti-mould paints are available. These paints contain additives that help resist mould growth.

However:

• They work best after mould has been properly removed
• They do not fix condensation or leaks
• They are a preventative measure, not a cure

Anti-mould paint should be the final step, not the first.

The Correct Way to Treat Mould Before Painting

If you plan to repaint an affected wall:

1. Identify and fix the moisture source
2. Remove visible mould safely
3. Allow the surface to dry completely
4. Apply a mould-resistant primer if needed
5. Use anti-mould paint for added protection

Skipping steps will likely lead to mould returning.

When Should You Avoid DIY?

If mould:

• Covers a large area
• Returns quickly
• Is linked to water damage
• Is accompanied by strong damp smells

Professional assessment may be required.

Final Thoughts

Painting over black mould may temporarily hide stains, but it does not solve the problem. The only long-term solution is to remove the mould and eliminate the moisture causing it.

Treat the cause first — paint last.