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28 August 2026

How to remove mould from painted walls (without spreading it)

Quick answer

To remove mould from a painted wall safely, ventilate the room, wear a mask and gloves, gently treat the area with an anti-microbial product rather than dry-brushing (which spreads spores), and let it dry. If the wall is soft, stained through or the mould returns, it needs professional treatment.

Do it wrong and you spread it

The instinct is to grab a dry brush or cloth and scrub — but dry-disturbing mould flings spores into the air, spreading it to other surfaces and into your lungs. The right method removes it while keeping spores contained.

The safe method

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Ventilate the room and wear a mask, gloves and eye protection. Apply an anti-microbial mould treatment to the area (don't dry-brush), let it work, then gently wipe. Dispose of cloths in a sealed bag. Let the wall dry fully. Avoid bleach on porous painted walls — it lightens the stain but doesn't reach the roots, which is why it comes back.

When cleaning isn't enough

If the paint is bubbling, the plaster feels soft, the stain has soaked through, or the mould keeps returning, the problem is inside the wall — see how to tell if mould is inside your walls. No surface method fixes that.

Fixing it properly

Where mould is in the plaster or recurring, professional mould removal takes out the contaminated material and, with the moisture source fixed, the wall is re-treated and made good. An mould inspection measures the wall first so you know whether it's a clean or a treatment job.

Not sure if your wall needs more than a clean? book a €75 inspection or call +357 96 738151.

Frequently asked questions

What's the safest way to remove mould from a wall?
Ventilate, wear protection, apply an anti-microbial treatment rather than dry-brushing, wipe gently, bag the cloths, and let the wall dry fully.
Should I use bleach on wall mould?
Bleach lightens the stain but doesn't reach the roots on porous painted walls, so mould returns. An anti-microbial mould product is more effective.
Why does wall mould keep coming back after I clean it?
Because the moisture source and any mould inside the plaster remain. Surface cleaning only removes what you can see.
When should I call a professional for wall mould?
If the plaster is soft or bubbling, the stain has soaked through, the area is large, or the mould keeps returning after cleaning.

Not sure how bad yours is?

Book a €75 inspection and know for certain — or call us now.

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