Why do I still have mould?

7 common causes

Mould needs moisture, warmth and organic material. These everyday household issues create the perfect conditions — and until the cause is fixed, mould keeps coming back.

What it looks like in a real home

Excess moisture

Water leaks

Poor ventilation

Condensation

The top mould causes in homes

1DROPExcess moistureHigh humidity, leaks or spills add too much moisture to the air and surfaces.

2PIPEWater leaksRoofs, pipes, windows or appliances let water seep in and feed mould.

3WINDPoor ventilationLimited airflow traps moisture — especially in bathrooms, kitchens and laundries.

4WINDOWCondensationWarm, moist air hitting cold surfaces forms droplets that lead to mould.

5MOPPoor or incorrect dryingNot drying properly after spills, floods or cleaning leaves moisture behind.

6PLANTHouseplants & damp soilOverwatering adds moisture to the air and encourages growth.

7LAUNDRYDrying clothes indoorsAdds moisture, especially in rooms that aren't well ventilated.

LEAFThe common threadEvery cause comes back to trapped moisture. Fix that, and mould loses its grip.

How to keep it from coming back

WINDImprove ventilationIn every room

WRENCHFix leaks quicklyKeep areas dry

DEHUMIDUse dehumidifiersIn damp areas

SPRAYClean & dry surfacesRegularly

SUNLet light inWhenever possible

ALERT

Act early — small patches grow fast. And if the moisture source isn't fixed, mould will keep returning no matter how often you clean it. When in doubt, get it assessed.