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THE CODEEX JOURNAL / LONDON PROPERTY CARE

Damp and Mould: Build a Repair Brief That Addresses the Cause

A practical guide to documenting damp and mould, reporting the issue and separating investigation, repairs and decorative making good.

CODEEX Maintenance2 min readUpdated 1 November 2026
CODEEX-branded worker fitting a shelf in a home
Your next improvement starts here.

A patch of mould or damaged decoration is a reason to understand what is happening in the property. The useful maintenance brief goes beyond the visible mark: where it appears, when it returns and whether there are signs of water entry or other defects.

Record the pattern without disturbing the area

Take photographs that show both the affected surface and its position within the room, where it is safe to do so. Note when the problem was first noticed, whether it changes after rain and whether nearby fittings or finishes are also affected. Keep earlier repair records and photographs if available. This information can help the person assessing the property; it does not replace an investigation or establish the cause by itself.

Ask for the underlying issue to be assessed

Government guidance on damp and mould stresses addressing underlying causes rather than only removing the visible mould. A repair enquiry may therefore need investigation of a leak, water entry, ventilation or another property defect before decorative work is appropriate. Avoid assuming that every mark has the same explanation. Tell the office about previous treatment, recurring areas and any known defects so responsibilities can be identified clearly.

Use the right reporting route for the property

For a rented or managed home, report the issue promptly to the landlord or responsible managing agent and keep a record of the communication. Include the location, photographs and any relevant access information. A contractor's appointment does not replace the responsible party's assessment and reporting process. If there are health concerns, seek appropriate professional advice rather than relying on a decorating or general maintenance opinion.

Separate investigation, repair and finishing

Clarify who will investigate, who will authorise the underlying repair and when any making good can be assessed. Repainting a surface and repairing the defect behind it are different scopes. Drying, substrate condition and specialist recommendations may affect the sequence. Ask for findings and agreed work to be recorded so the next contractor is not working from an incomplete description of what has already been done.

Give the office a complete history

Send the postcode, room locations, photographs, when the issue occurs and details of previous repairs. Explain whether the property is occupied and who can approve access and work. CODEEX can review suitable repair or making-good enquiries once the relevant assessment and scope are clear. This guide supports maintenance planning; it is not a diagnosis, a health assessment or a substitute for specialist damp-and-mould investigation.

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