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Building Surveys in London and the Southeast.

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Damp and Moisture Surveys

A Damp & Moisture Survey is a focused inspection designed to investigate visible dampness, suspected moisture ingress, mould growth, condensation, staining, leaks and other moisture-related defects affecting a property.

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The survey aims to identify the likely source of the problem, assess the extent of the damage and provide practical, independent recommendations for further investigation, repair and ongoing maintenance.

Independent investigation of damp and moisture problems

Dampness can arise from a wide range of causes, including defective roofs, leaking rainwater goods, failed external finishes, plumbing leaks, poor ventilation, condensation, high external ground levels, defective drainage and inappropriate alterations.

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Moisture problems are often misdiagnosed, particularly where conclusions are based only on handheld moisture-meter readings. Our approach considers the wider building construction, surrounding defects, ventilation, occupancy conditions and moisture distribution before recommendations are made.

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CJC Property Surveys does not sell damp-proofing treatments or receive commission from remedial contractors. Our advice is independent and based on the condition of the property.

When is a Damp & Moisture Survey appropriate?

The survey may be suitable where there is:

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  • Damp staining to walls or ceilings

  • Mould growth or persistent condensation

  • Peeling paint, blistering finishes or damaged plaster

  • Musty odours

  • High moisture-meter readings

  • Suspected penetrating damp

  • Suspected rising damp

  • Water ingress following rainfall

  • Dampness around windows, chimneys or roof junctions

  • Moisture at low level within external walls

  • Suspected plumbing or drainage leaks

  • Dampness following recent building works

  • Disagreement over the cause of moisture

  • A previous recommendation for damp-proofing works

  • A requirement for independent advice before buying a property

What the survey investigates

Internal inspection

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Where accessible, the inspection may consider:

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  • Location and pattern of staining or deterioration

  • Condition of walls, ceilings, floors and finishes

  • Mould growth and condensation indicators

  • Ventilation provision

  • Moisture around windows and external doors

  • Dampness around chimneys and fireplaces

  • Plumbing and sanitary fittings

  • Areas adjoining bathrooms, kitchens and utility spaces

  • Signs of timber decay

  • Bridging of damp-proof courses

  • Evidence of previous damp-proofing treatment

  • Internal alterations that may affect ventilation or moisture movement

External inspection
 

The external inspection may include:
 

  • Roof coverings and visible roof junctions

  • Chimneys, flashings and parapets

  • Gutters, downpipes and rainwater disposal

  • External walls, render and pointing

  • Cracking and open joints

  • Windows, doors, sills and sealants

  • Ground levels adjoining the building

  • External drainage arrangements

  • Extensions, conservatories and flat roofs

  • Vegetation and other features affecting drying

  • Defects that may allow penetrating moisture

Environmental conditions
 

Where relevant, consideration may also be given to:
 

  • Internal humidity

  • Temperature

  • Ventilation

  • Heating patterns

  • Condensation risk

  • Occupancy-related moisture generation

  • Whether the affected area can adequately dry

Survey equipment
 

Depending on the nature of the problem, the surveyor may use appropriate inspection equipment such as a moisture meter, hygrometer, thermal imaging camera, binoculars, camera equipment or other non-invasive survey tools.
 

Moisture-meter readings are used as part of the wider inspection and are not relied upon in isolation. Elevated readings can be influenced by salts, metallic materials, foil-backed finishes and other construction features.

What the client receives
 

The report may include:
 

  • A summary of the reported problem

  • Description of the areas inspected

  • Photographs of relevant defects

  • Moisture readings where appropriate

  • Likely causes of the dampness

  • Contributing construction or maintenance defects

  • Assessment of the severity and urgency

  • Advice on immediate precautions

  • Recommended repair priorities

  • Advice on ventilation and condensation control

  • Recommendations for opening-up or specialist testing

  • Advice on whether further monitoring is required

  • Suggested types of contractor or specialist

  • Comments on inappropriate previous repairs

  • An opportunity to discuss the findings with the surveyor

Why choose CJC Property Surveys?

Your inspection will be undertaken by a Chartered Building Surveyor with experience in building defects, water ingress, condensation, cracking and traditional construction.
 

We provide:
 

  • Independent advice with no remedial-treatment sales

  • Direct access to the surveyor

  • Clear photographic reporting

  • Practical repair recommendations

  • Consideration of the underlying cause

  • Proportionate advice on specialist investigations

  • Support following issue of the report

  • Local coverage across London, Kent and the South East

Types of damp and moisture problems

Penetrating damp

 

Penetrating damp occurs where moisture passes through the external building envelope. Common causes include defective roof coverings, failed flashings, cracked render, open pointing, leaking gutters and poorly sealed windows.
 

Condensation and mould

 

Condensation occurs when moisture-laden air meets a cold surface. It is commonly associated with poor ventilation, inadequate heating, thermal bridging, overcrowding or high levels of internal moisture production.
 

Plumbing leaks

 

Leaks from water supplies, waste pipes, heating systems, bathrooms and kitchens can cause localised dampness. Concealed leaks may require further investigation by a plumber or leak-detection specialist.
 

Ground-related moisture

 

Low-level dampness may be associated with high ground levels, bridged damp-proof courses, defective floors, poor drainage or moisture retained within solid-wall construction.
 

Rising damp

 

Rising damp can occur, but it should not be assumed solely from low-level staining or electrical moisture-meter readings. Alternative causes should be considered before damp-proofing treatment is recommended.
 

Construction moisture

 

Newly completed plastering, rendering, screeding and other wet trades may retain moisture for extended periods, particularly where ventilation and heating are limited.

Our diagnostic approach

We consider the building as a whole rather than treating the visible stain in isolation. The survey will assess the relationship between the affected area, external defects, construction type, ventilation, drainage and previous repairs.

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Where a definitive conclusion cannot be reached without opening up the building, this will be stated clearly, together with proportionate recommendations for further investigation.

What the survey does not include

The standard survey is normally:
 

  • Visual and non-invasive

  • Limited to safely accessible areas

  • Undertaken without removing plaster or finishes

  • Undertaken without lifting fixed floor coverings

  • Undertaken without opening walls, floors or ceilings

  • Not a drainage CCTV survey

  • Not a plumbing pressure test

  • Not a laboratory analysis of salts or materials

  • Not an asbestos survey

  • Not a timber treatment survey

  • Not a structural engineering inspection

  • Not a guarantee that all concealed moisture sources will be identified

Damp survey versus free damp-proofing survey

Some damp-proofing companies offer free inspections. These may be useful for obtaining a quotation, but the inspecting company may also be selling the recommended treatment.

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An independent Damp & Moisture Survey is intended to establish the likely cause of the problem before remedial works are specified. This can help avoid unnecessary chemical damp-proof courses, waterproof coatings, replastering or other treatments that do not address the underlying defect.

Who the service is for

The service may be useful for:

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  • Homeowners

  • Prospective purchasers

  • Landlords

  • Leaseholders

  • Managing agents

  • Property managers

  • Housing providers

  • Insurers

  • Solicitors requiring independent technical advice

  • Clients considering damp-proofing quotations

Survey process

1. Initial enquiry

The client provides the property address, description of the issue and photographs where available.

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2. Scope and quotation

You confirm whether the matter appears suitable for a focused Damp & Moisture Survey and issue a fixed quotation.

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3. Inspection

The affected areas and relevant external elements are inspected, subject to access and safety.

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4. Analysis

The findings are considered alongside the building’s construction, moisture pattern, ventilation and external condition.

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5. Report

A written report is issued setting out likely causes, risks, repair priorities and any further investigations required.

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6. Follow-up discussion

The client can discuss the findings and recommended next steps with the surveyor.

Pricing

The fee for a Damp & Moisture Survey depends on the size of the property, number of affected areas, location, accessibility and complexity of the reported problem.

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A fixed quotation will be provided before appointment, confirming the inspection scope and reporting timescale.

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Dampness should be investigated before internal finishes are repeatedly repaired or specialist treatment is commissioned.

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Send us details of the issue and photographs of the affected area for an initial review and fixed quotation.

Request a damp survey quote
Request a damp survey quote
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