Independent Damp Surveys & Second Opinions
Understand the cause before committing to repairs. True Damp Specialists investigates damp, moisture and building defects across residential, commercial and heritage property. We consider the building, the available evidence and what has happened previously before explaining what we believe is causing the problem and what should happen next.
If you've received conflicting advice, previous works haven't resolved the issue or damp has been raised during a property purchase, tell us what's happened and we'll advise on the most appropriate next step.
PCA TrainedDetailed Written ReportingResidentialCommercialHeritageTrusted When Answers Matter
Many clients contact us after conflicting advice, an unresolved problem or a recommendation for major work. Their feedback often reflects the time taken to understand the building, explain the findings clearly and provide practical information they can use.
"We recently experienced a leak that caused significant water damage to our bathroom and flooring, so we contacted Rob for a quote to assess the extent of the damp. From the outset, he was incredibly supportive and professional, taking the time to guide us through every step of the process and clearly explain what needed to be done. His report was both thorough and easy to understand, giving us real confidence in how to move forward. He also made himself available to answer questions at any time, which really helped ease our worries during what has been a very stressful situation. Recommend!"
Joe
AL1
"I have an older property which has had damp problems since I moved in 8 years ago. I have tried several people but none of them have been as helpful as Rob. Rob responded very quickly and came to do his survey within a few days. He talked me through everything he found and produced a detailed report the next day. Highly recommended."
Denise T
AL1
"The process from start to finish was outstanding it was a pleasure meeting Rob who explained clear defined steps and detailed knowledge surrounding damp issues. The report was equally impressive lots of detailed analysis along with thermal imaging to show the root cause and added remedial actions to undertake to tackle the issues cant recommend highly enough."
Saf N
LU1
"We recently experienced a leak that caused significant water damage to our bathroom and flooring, so we contacted Rob for a quote to assess the extent of the damp. From the outset, he was incredibly supportive and professional, taking the time to guide us through every step of the process and clearly explain what needed to be done. His report was both thorough and easy to understand, giving us real confidence in how to move forward. He also made himself available to answer questions at any time, which really helped ease our worries during what has been a very stressful situation. Recommend!"
Joe
AL1
"I have an older property which has had damp problems since I moved in 8 years ago. I have tried several people but none of them have been as helpful as Rob. Rob responded very quickly and came to do his survey within a few days. He talked me through everything he found and produced a detailed report the next day. Highly recommended."
Denise T
AL1
"The process from start to finish was outstanding it was a pleasure meeting Rob who explained clear defined steps and detailed knowledge surrounding damp issues. The report was equally impressive lots of detailed analysis along with thermal imaging to show the root cause and added remedial actions to undertake to tackle the issues cant recommend highly enough."
Saf N
LU1
We Look at the Building, Not Just the Damp Patch
A damp patch is a symptom. It is not a diagnosis. Investigation starts by looking beyond the visible area and considering how the building is working as a whole.
Water pathways
Roofing, rainwater goods, ground levels, drainage, floors and concealed voids can all affect moisture behaviour.
Building conditions
Ventilation, thermal bridging, salts and previous alterations can change how a symptom presents.
Evidence in context
One factor may be responsible, or several may be interacting. The conclusion follows the building context and evidence.
A proportionate next step
The aim is to understand the cause before a treatment or repair is selected.
What Do You Need Help Understanding?
Choose the route that best reflects the question you need answered. Each service leads to a detailed investigation and clear next-step advice.
Understand the problem
Damp & Moisture Investigations
Damp, staining, unexplained moisture or deterioration where the cause needs establishing.
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Condensation, Mould & Ventilation
Humidity, condensation, mould and ventilation concerns considered in the context of the building.
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Leaks, Drainage & Water Ingress
Leaks, drainage defects, roofs, external water ingress and concealed moisture pathways.
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Basements & Below-Ground
Below-ground moisture, waterproofing context and the information needed before an intervention.
Learn MoreIndependent view
Second Opinions & Failed Previous Works
A clear review where advice conflicts, previous work has not solved the problem or significant works are proposed.
Learn MorePre-Purchase Investigations
Understand a damp or moisture concern before you commit to a property purchase.
Learn MoreHeritage & Traditional Buildings
An approach that considers traditional construction, materials, permeability and the building’s history.
Learn MoreProfessional project support
Commercial Investigations
Practical investigation and reporting for commercial property, property teams and project decisions.
Learn MoreRemedial Specifications & Project Support
Diagnosis first, followed by a clear scope and coordinated next steps where required.
Learn MoreFerro & Reinforcement Scanning
Commercial concrete scanning to support safe, informed coordination before drilling, cutting or fixing.
Learn MoreIf the issue spans more than one area, we will scope the investigation around the building.
Discuss Your PropertySpecialist Damp & Moisture Investigations
Examples of how we investigate symptoms, interpret moisture behaviour, identify root causes and guide the correct remedial strategy.
Grade II listed terrace — external moisture, not rising damp
A mid-19th century listed property where previous contractors had proposed chemical damp proofing and internal tanking. The investigation reviewed the age and permeability of the building fabric, the external ground and rainwater context, and the pattern of moisture internally. The evidence pointed to external water management failures and lateral ingress, not rising damp. We recommended a source-first strategy focused on drainage and external detailing rather than internal barriers that could trap moisture and damage the historic fabric.
Escape of water in converted factory flat
Visible floor distortion, fungal growth at the bathroom doorway, and ceiling staining in the property below suggested a wider moisture pathway than surface staining alone. The investigation traced the issue to a concealed leak behind the WC installation within a service void. Moisture had migrated laterally through the floor structure and vertically downwards, explaining the spread of damage and the symptoms in the property below. We provided a staged remedial plan covering leak repair, controlled drying, affected materials and reinstatement.
Listed barn conversion — no active dampness confirmed
A Grade II listed agricultural barn conversion had been flagged for suspected dampness and timber deterioration in a prior RICS Level 3 survey. Our investigation considered the traditional vapour-permeable construction, ventilation context, meter readings and visible fabric condition. The evidence did not support active moisture defects; the readings were consistent with the behaviour of the original construction. We recommended ongoing monitoring and conservation-aligned maintenance rather than unnecessary damp treatment.
Second opinion overturns recommended damp treatment
A homeowner had been quoted for chemical damp proofing and membrane installation by a treatment company. Our independent survey compared the internal moisture pattern with external defects, drainage, junction detailing and rainwater exposure. The findings showed the primary source was external defect and rainwater ingress, not rising damp. By addressing the external drainage and junction detailing, the moisture issue could be resolved without unnecessary internal treatment or disruption.
Repeated mould complaint traced to ventilation failure
A landlord was facing repeated mould complaints after previous contractors had treated the mould cosmetically without identifying the cause. The assessment considered occupancy moisture load, ventilation provision, surface temperature risk, humidity behaviour and visible mould distribution. The evidence showed the issue was driven by inadequate ventilation and excess humidity rather than a primary building defect. We provided a ventilation strategy and monitoring plan so the cause could be controlled instead of repeatedly cleaning the symptom.
Remedial specification for complex basement moisture
A property had complex below-ground moisture issues and multiple contractors had given conflicting advice. The BS 8102-aligned investigation reviewed moisture pathways, below-ground risk, construction interfaces and the limitations of previous recommendations. We separated immediate control measures from longer-term specification decisions and provided a clear, prioritised remedial strategy. The client could then instruct the right specialist works with confidence instead of relying on guesswork.
Need a clearer answer, not a generic quote?
Talk through the symptoms, the property and any previous advice, and we can help you choose the right next step in the UK.
Where we work
We operate across North London and the Home Counties, including Buckinghamshire, Hertfordshire, Bedfordshire, Milton Keynes, Bedford, Amersham, Hitchin, Welwyn Garden City and Stevenage. We also take on specialist projects further afield where a clear, diagnosis-led approach is required.
Specialist Coverage
North London, Home Counties & Midlands
North London, Watford, St Albans, Hitchin, Welwyn Garden City, Stevenage
North London & Hertfordshire
Milton Keynes, Amersham, Aylesbury and wider Buckinghamshire
Buckinghamshire
Home Counties, Midlands and specialist projects further afield
Wider specialist coverage
Need a clear answer, not a guess or a generic quote?
We provide proper diagnosis so you can understand what’s happening and what should be done — rather than jumping straight into unnecessary works.
Questions Before You Decide
Straight answers about independent damp and moisture investigations.
Still have questions?
Still Not Sure What’s Causing the Problem?
Tell us what you are seeing, what has happened previously and what you need to decide.
We will advise on the most appropriate next step.
