Damp Investigation & Moisture Assessment
A focused investigation into damp, condensation and moisture issues within a property. We use specialist equipment — including moisture meters, thermal imaging cameras and hygrometers — to identify the type, source and extent of damp and provide clear, actionable recommendations for remedial treatment.
Whether you have noticed damp patches, mould growth, a musty smell, peeling wallpaper or simply want peace of mind before buying, our damp investigation gives you the answers you need without the cost of a full building survey.
Damp Investigation & Moisture Assessment
Our Home Surveyor & Property Valuer Accreditation & Professional Membership
Our Damp Investigation & Moisture Assessments are carried out by qualified surveyors who belong to the professional bodies that set UK property standards. Every report is prepared to recognised guidance and is completely independent, so you can rely on the findings when you buy, sell or value a home.
What Is a Damp Investigation?
A damp investigation — also called a damp survey or moisture assessment — is a focused, specialist inspection that diagnoses the cause of damp, condensation and moisture problems within a property. Unlike a standard home survey, which provides a general overview of condition, a damp investigation zeroes in on moisture-related issues using specialist diagnostic equipment and techniques.
What It Covers
- Moisture meter readings across all accessible walls, floors and ceilings
- Identification of the type of damp present (rising damp, penetrating damp, condensation or a combination)
- Thermal imaging to identify cold spots and hidden moisture
- Assessment of ventilation, extraction and heating arrangements
- A detailed written report with findings, photographs and a remedial specification
What It Does Not Cover
- A full structural survey or assessment of non-moisture-related defects
- A market valuation of the property
- Testing of gas or electrical installations
- Guaranteed diagnosis behind concealed areas without opening up
- Carrying out the actual remedial works — we diagnose only
When Should You Commission a Damp Investigation?
A damp investigation is the right course of action in specific situations. Here is how to tell if it suits your circumstances.
Suitable For
- Homeowners who have noticed damp patches, mould or a musty smell
- Buyers whose home survey flagged damp as a concern and need a specialist follow-up
- Landlords responding to tenant complaints about condensation or mould
- Property owners planning renovation works who want to understand existing moisture issues
- Vendors who want to address damp issues before putting a property on the market
- Anyone who has had a damp-proofing quote and wants an independent second opinion
Not Suitable For
- A damp investigation alone is not a substitute for a full building survey
- Properties where the main concern is structural rather than moisture-related
- Situations where you need a valuation or reinstatement cost assessment
- Commercial properties — our damp investigations are designed for residential properties only
- If you need the remedial work carried out — we diagnose and specify, we do not contract
Not sure whether you need a damp investigation or a full survey? Speak to a surveyor for free, no-obligation advice.
What Is Included in a Damp Investigation
Every damp investigation and moisture assessment we produce includes the following as standard.
Moisture Meter Survey
Systematic moisture readings taken across all accessible internal and external walls, floors and ceilings using a calibrated electronic moisture meter.
Damp Type Diagnosis
Clear identification of whether the damp is rising damp, penetrating damp, condensation, or a combination of these, so the correct treatment can be specified.
Thermal Imaging
Infrared thermal imaging used to identify cold bridges, insulation gaps and hidden moisture that would not be visible to the naked eye during a standard visual inspection.
Ventilation Assessment
Evaluation of existing ventilation, extraction and heating arrangements to determine whether condensation is being caused by lifestyle factors or inadequate building services.
External Inspection
Examination of external walls, ground levels, damp-proof courses, gutters, downpipes and drainage to identify sources of penetrating damp and water ingress.
Remedial Specification
A clear, prioritised specification of the remedial works required, with enough detail for you to obtain comparable quotes from competent damp-proofing contractors.
Colour Photographs
Photographs of all significant findings, including moisture meter readings in situ, thermal images and visible defects, so you can see exactly what the surveyor found.
Plain English Report
Written in clear, straightforward language with no technical jargon. We explain what the problems are, what caused them and what needs to be done to fix them.
How the Damp Investigation Process Works
From enquiry to report — straightforward and transparent.
Get a Quote
Contact us with the property details and a description of the damp issues you have noticed. We respond within 24 hours with a fixed-price quote.
Book the Inspection
Choose a convenient date. We typically schedule within 5–10 working days of your instruction, subject to access and availability.
Surveyor Inspects
The surveyor attends the property with specialist equipment and carries out a thorough damp investigation, usually taking 1–3 hours depending on the size of the property and the extent of the issues.
Receive Your Report
Your detailed damp investigation report — including findings, photographs, thermal images and a remedial specification — is delivered within 5 working days.
The Three Main Types of Damp We Investigate
Understanding which type of damp is affecting your property is the first step to fixing it. Our investigation distinguishes between these three common types.
Rising Damp
Moisture from the ground that travels upwards through porous building materials — such as brick, stone or mortar — by capillary action. It typically appears as a tide mark up to 1 metre above ground level on internal ground-floor walls. Rising damp is often caused by a failed, missing or bridged damp-proof course (DPC) and can lead to salt crystallisation, plaster damage and timber decay if left untreated.
Common signs: tide marks on lower walls, peeling wallpaper, white salt deposits, rotting skirting boards.
Penetrating Damp
Water that enters the building horizontally through the external envelope — walls, roofs, windows or doors — often as a result of a building defect such as cracked render, faulty pointing, leaking gutters, defective flashing or porous brickwork. Penetrating damp can occur at any level of the building and is typically worse after heavy or prolonged rainfall.
Common signs: damp patches on walls or ceilings, water staining, mould growth, dripping water, damaged plaster.
Condensation
The most common form of damp in UK homes, condensation occurs when warm, moisture-laden air comes into contact with cold surfaces — such as windows, external walls or cold corners — and releases water droplets. It is often caused by a combination of inadequate ventilation, insufficient heating and modern lifestyle factors such as drying clothes indoors or using unvented tumble dryers.
Common signs: water droplets on windows, black mould spots on walls and ceilings, musty smell, damp clothing in wardrobes.
Specialist Equipment We Use
We use professional-grade equipment to diagnose damp accurately — the same tools used by the UK's leading damp and timber surveyors.
Electronic Moisture Meter
A calibrated, pin-type moisture meter that measures the moisture content of walls, floors and timber to quantify the extent of damp. Readings are recorded systematically and included in your report.
Thermal Imaging Camera
An infrared camera that detects temperature variations across surfaces, revealing cold spots, thermal bridges, insulation gaps and hidden moisture that would be invisible to the naked eye.
Hygrometer
A digital instrument that measures relative humidity and ambient temperature within rooms. Used to assess the moisture load in the air and whether ventilation is adequate for the occupancy.
Borescope
A small, flexible camera probe that can be inserted into cavities, voids and behind surfaces to inspect concealed areas without the need for destructive opening up.
Damp Meter (Calcium Carbide)
A specialist 'speedy' moisture meter that provides a quantitative measurement of the total moisture content within a sample of masonry, confirming the extent of damp in a wall.
Endoscope Camera
A compact inspection camera used to view areas behind plasterboard, under floor voids, inside chimney breasts and in other inaccessible locations where damp may be concealed.
Damp Investigation Questions
What is the difference between a damp survey and a home survey?
A damp survey — also called a damp investigation or moisture assessment — is a specialist, focused inspection that looks exclusively at damp, condensation and moisture-related issues within a property. It uses specialist diagnostic equipment such as moisture meters and thermal imaging cameras to identify the type, source and extent of damp. A home survey, by contrast, is a general inspection of the property's overall condition, covering structure, services, defects and in some cases a valuation. A home survey may flag damp as a concern, but it will not diagnose the cause in detail or specify remedial treatment. If a home survey has identified damp and recommended further investigation, a damp investigation is the logical next step.
Do you use a moisture meter?
Yes — a calibrated electronic moisture meter is the primary diagnostic tool we use during every damp investigation. The meter measures the moisture content of walls, floors and timber and gives us an objective, quantifiable reading rather than relying on visual inspection alone. We take systematic readings across all accessible surfaces and record them in your report so you can see exactly where moisture levels are elevated and by how much. In addition to the moisture meter, we also use thermal imaging, hygrometers and borescopes where appropriate to build a complete picture of the damp issue.
How much does a damp investigation cost?
Our damp investigation and moisture assessment starts from £250 plus VAT for a typical residential property. The exact price depends on the size of the property, the number of rooms to be inspected and the complexity of the damp issues. We provide a fixed-price quote within 24 hours of your enquiry — the price we quote is the price you pay, with no hidden extras, no travel surcharges and no additional fees for any location within our seven counties (Bedfordshire, Buckinghamshire, Cambridgeshire, Hertfordshire, Northamptonshire, Greater London and Oxfordshire). We are entirely independent — we do not sell damp-proofing products or carry out remedial works — so our advice is always impartial.
Will you recommend a specific damp-proofing company?
No, we do not recommend or endorse any specific damp-proofing contractor or treatment company. Our role is to provide an independent, impartial diagnosis and a clear remedial specification. The specification we provide is detailed enough for you to obtain comparable quotes from at least three competent local contractors. This approach keeps us completely independent — we have no financial interest in any treatment company, we do not take commission or referral fees, and our only objective is to give you accurate, unbiased advice. We are happy to review quotes you receive from contractors and offer an opinion on whether the proposed works match our specification.
How long does a damp investigation take on site?
A damp investigation typically takes between 1 and 3 hours on site, depending on the size of the property, the number of rooms affected and the complexity of the damp issues. A small flat with isolated damp in one room may take an hour; a large period house with damp in multiple locations, external defects to trace and complex condensation patterns may take up to three hours. The surveyor will examine every accessible internal and external surface, take moisture meter readings, capture thermal images where appropriate and inspect external ground levels, drainage, gutters and downpipes. You are welcome to be present during the inspection — the surveyor can explain findings as they go and answer your questions on the spot.
Do you cover my area for a damp investigation?
We provide damp investigations and moisture assessments across all seven of our counties: Bedfordshire, Buckinghamshire, Cambridgeshire, Hertfordshire, Northamptonshire, Greater London and Oxfordshire. Every surveyor who works with us is based locally and understands the local geology, building types, common damp issues and climate conditions in their area. There are no travel surcharges for any location within our coverage area — the price we quote is the price you pay regardless of where you are within our seven counties.
Get a Fixed-Price Damp Investigation Quote
Free, no-obligation quote within 24 hours. Independent, impartial advice with no ties to damp-proofing contractors.