Step by step
Record before cleaning
Photograph each affected area with a wider room view, note smell, condensation, water damage and the date. Mark whether the area is growing.
Check immediate health and safety
Keep vulnerable people away from significant mould and seek medical help for concerning symptoms. Do not dry-brush or use an ordinary vacuum on mould.
Report the problem in writing
For rented homes, tell the landlord or agent promptly, include photographs and health concerns, and ask for inspection, cause, remedial plan and timescale.
Address cause and surface separately
Leaks, failed ventilation, cold surfaces and inadequate heating need investigation. Cleaning alone does not prevent recurrence; larger areas may require a qualified professional.
Ready-to-use checklist
- Areas photographed and dated
- Leaks or failed ventilation noted
- Health concerns recorded
- Written report sent
- Inspection and timescale requested
- Follow-up evidence retained
Common problems
The mould returns after cleaning
Treat recurrence as evidence that moisture or a building defect remains. Update the record and request investigation of the cause.
The landlord blames lifestyle only
Describe the ventilation and heating already used and ask for the property, extractor fans, leaks and insulation to be assessed. Tenant actions are not a substitute for fixing defects.
UK sources and scope
Checked 27 September 2026. Details may vary by nation, provider and circumstances; follow the linked official or specialist source for the current position.