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Warning Signs of Damp and How to Identify It

How to spot damp: condensation, penetrating and rising damp, what each looks like, causes and fixes. Fraser Bond diagnoses and repairs damp and mould in London homes.

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

Updated October 2026 · Fraser Bond

Guide

Warning Signs of Damp and How to Identify It

3types
Signs
Causes
Wefix it
In short: Black mould on cold walls usually means condensation; damp patches after rain suggest penetrating damp; a tide mark low on ground-floor walls may be rising damp. Fraser Bond diagnoses and repairs damp and mould in London homes and rentals.

Warning signs

Musty smell, mould spots, peeling paint or wallpaper, tide marks, crumbling plaster, rotting skirting, and condensation on windows every morning.

What to do

Find the cause before treating it. Many "rising damp" problems are actually condensation, leaking gutters or high external ground levels.

Landlords' duties

Damp and mould can make a home unfit for habitation. Awaab's Law sets strict repair timescales for social landlords from October 2025, and the government has said similar duties will apply to private landlords. Fix problems quickly and keep records.

Fraser Bond property maintenance

  • Reactive repairs and emergency call-outs
  • Planned and seasonal maintenance
  • Damp, mould and ventilation fixes
  • Gas safety, EICR and EPC arranged with Gas Safe engineers and accredited assessors
  • Photo reports, certificates and invoices kept for your records

Request a quote or a call back →

TypeTypical signsCommon fixes
CondensationBlack mould, wet windows, worst in winterExtractor fans, heating, ventilation, insulation
Penetrating dampPatches after rain, on upper walls or ceilingsFix gutters, pointing, roof or render
Rising dampTide mark up to about 1m, saltsLower ground levels, repair damp-proof course

How it works

1
ReportTell us about the problem online or by phone; urgent issues are prioritised.
2
AssessWe triage, and visit or send the right trade, with photos before work starts.
3
Quote or fixSmall jobs are fixed straight away within agreed limits; larger work is quoted first.
4
RecordPhotos, invoices and any certificates are saved to your file.

Frequently asked questions

Is mould the tenant's fault?

Sometimes lifestyle plays a part, but landlords must deal with causes such as poor ventilation, leaks and cold walls.

Do you do damp surveys?

Yes, we inspect, find the cause and quote for repairs.

Damp or mould problem?

Send us the address and what you need. We will arrange a visit or call and give you a written quote.

Book an inspectionOur property services

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