Can you paint over mould? (Why it never works)
Quick answer
No — painting over mould doesn't work. The mould keeps growing under the paint and comes back through it, often within weeks, because the moisture and the mould itself are still there. You must remove the mould and fix the moisture source first, then repaint, ideally with an anti-mould paint.
The tempting shortcut that backfires
It's an understandable impulse: the mould looks bad, so cover it with a fresh coat of paint. But this is the single most common mistake we see, and it always fails — often making the problem harder to spot until it's worse.
Why it grows back
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Paint is not a mould treatment. Underneath that new coat, the mould is still alive and the moisture feeding it is untouched. So it keeps growing and pushes back through the paint, sometimes within weeks — and because paint traps moisture against the wall, it can even accelerate things. This is why mould comes back when you only treat the surface.
Even 'anti-mould' paint has rules
Anti-mould paints do help resist regrowth — but only when applied to a properly treated, mould-free, dry surface, with the moisture source fixed. Painted straight over live mould, they fail like any other paint.
The right order
Do it in this sequence: fix the moisture source, remove and treat the mould (see safe removal), let the surface dry fully, then repaint — anti-mould paint as a finish. Where plaster is damaged, professional mould removal and re-plastering come first. An mould inspection confirms the wall is ready to paint rather than hiding a problem.
About to paint over a damp wall? Check it first — book a €75 inspection or call +357 96 738151.
Frequently asked questions
Can I just paint over mould?
Does anti-mould paint work over existing mould?
Why does mould come back after painting?
What should I do before painting a wall that had mould?
Get a fixed quote
A €75 inspection gives you a fixed quote — no guesswork.