04/09/2026
Hidden damp appearing on walls or skirting after a warm, humid summer? That often shows where condensation has nourished mould in cold parts of a building and can look like a new damp problem even if the underlying cause has been present longer.
Responsibility depends. Landlords are usually responsible for repairing building defects that cause damp - structure, roofs, gutters and exterior walls - and must keep properties free from serious hazards under the Housing Health and Safety Rating System (HHSRS) (see gov.uk). Tenants should manage everyday ventilation and heating to reduce condensation. Leaving damp unreported increases health risk (see UKHSA), potential liability and repair costs.
Try this quick self-check: note exactly where the damp appears, whether it gets worse in cold or humid weather, and whether extractor fans and vents work. If you see persistent or spreading mould, or suspect a leak or rising damp, message us for advice or book an inspection - our team can assess, measure and supply a clear report for landlords, tenants or councils.