Why mould grows in winter (and how to stop it)
Quick answer
Mould thrives in winter because cold external walls and windows cause warm, moist indoor air to condense, while closed windows and drying laundry indoors trap extra moisture. The fix is managing that condensation: ventilate, heat evenly, reduce indoor humidity and keep air moving.
Winter is peak mould season
It's no coincidence that mould so often appears as the weather cools. Even in Cyprus, winter creates the ideal storm for condensation mould — and it catches a lot of homeowners by surprise.
What changes in winter
Keep mould from coming back
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Three things line up. External walls and windows get cold, so warm indoor air condenses on them. Windows stay shut for warmth, trapping humid air. And we generate more indoor moisture — drying laundry inside, more cooking, less ventilation. The result is water forming on cold surfaces, exactly where mould grows.
The classic winter spots
Cold external walls, window reveals and sills, ceiling corners, and behind furniture against cold walls. Bedrooms are common because of overnight moisture in a closed room — see bedroom mould.
How to stop winter mould
Ventilate daily even when it's cold (brief bursts work), wipe down morning window condensation, avoid drying laundry indoors without airflow, keep heating reasonably steady to avoid cold spots, and use a dehumidifier in problem rooms. If mould still appears every winter, there may be a deeper issue — an mould inspection finds it, and mould treatment clears what's there.
Mould back again this winter? book a €75 inspection or call +357 96 738151.
Frequently asked questions
Why do I get mould in winter but not summer?
How do I prevent mould in winter?
Does keeping the heating on stop mould?
Why does mould appear behind furniture in winter?
Keep mould from coming back
A monthly plan from €45, or book a one-off inspection.