Look for moisture, not just the visible patch
Mould can grow where moisture persists. A leak, roof issue, condensation or hidden damp may cause it to return if only the visible area is cleaned. Check for signs of water entry without disturbing damaged material; contact the landlord/property manager or an appropriate building professional when a leak or structural issue is suspected.
Use official health guidance and assess safe reach
NSW Health’s mould fact sheet (last updated 20 December 2022) says routine mould cleanup depends on the affected surface and notes absorbent carpet may need professional cleaning or replacement if contaminated. Read its full mould guidance and applicable local health advice.
Do not stand on unstable furniture, lean from a height or mix cleaning products. If the ceiling cannot be reached from a stable position, use a qualified provider.
Know when to stop and arrange assessment
Get qualified mould/building advice for extensive or recurring growth, a suspected leak, damaged ceiling material, hidden moisture or a patch that cannot be safely reached. The appropriate scope depends on the source, surface and extent; a generic web procedure cannot determine those conditions.
Do not treat health concerns as a cleaning diagnosis
NSW Health notes that mould exposure affects people differently and advises contacting a doctor about health problems after exposure. This page does not diagnose symptoms or promise that cleaning will prevent or resolve a health condition.
