Updated October 2026 · Fraser Bond
Repairs · Damp & mould
Mould in rental homes
Causesfind them
Landlordduty
Timescalestightening
Tenantsreport
In short: Mould is a health hazard, and landlords must keep homes fit for habitation and free from serious hazards. Common causes are condensation from poor ventilation or heating, leaks and penetrating damp, and less often rising damp. Tenants should report mould in writing promptly and ventilate the home; landlords should investigate the cause, fix leaks and improve ventilation, insulation or heating where needed. Strict timescales for investigating and fixing damp and mould already apply to social landlords under Awaab's Law, and the Renters' Rights Act extends similar duties to private landlords.
| Cause | Typical fix |
|---|---|
| Condensation | Extractor fans, trickle vents, heating |
| Leaks | Repair roof, gutters, plumbing |
| Penetrating damp | Repoint, fix render |
| Rising damp | Damp-proofing (confirm diagnosis first) |
Causes and fixes
Frequently asked questions
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Who pays to fix mould?
Usually the landlord, unless caused by the tenant's misuse.
Can I withhold rent?
It's risky; report and escalate to the council.
