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Warning Signs of Damp and How to Identify It

Find the cause before treating the symptom.

Warning Signs of Damp and How to Identify It Property Legal, Risk & Compliance

Updated October 2026 · Fraser Bond

Property · Damp

Spotting damp

Mustysmell
Blackmould
Tidemarks
Awaab'sLaw
In short: Common signs of damp are a musty smell, black mould, peeling paint or wallpaper, tide marks on walls, crumbling plaster, and condensation on windows. Condensation is the most common cause and is fixed with ventilation and heating; penetrating damp comes from leaks such as gutters or roofs; true rising damp is less common than often claimed. For rented homes, Awaab's Law now requires social landlords to investigate and fix damp and mould hazards within set timescales, and similar duties are planned for private landlords.
Condensation

Ventilate, heat evenly, use extractor fans.

Penetrating damp

Fix gutters, roofs, pointing and seals.

Rising damp

Get an independent survey before paying for treatment.

Mould

Clean it and fix the cause.

Frequently asked questions

Who fixes damp in a rental?

Usually the landlord, unless caused by the tenant's misuse.

Is rising damp common?

Less common than often diagnosed.

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