When you spot damp in your home, a free survey sounds like the obvious first step. No cost, no obligation — what’s not to like? Unfortunately, the reality is that many free damp surveys are not independent assessments at all. They are sales appointments designed to sell you treatment you may not need.
Understanding the difference between a genuine professional survey and a free sales visit could save you thousands of pounds.
The Business Model Behind Free Surveys
It’s worth asking a simple question: if a company sends someone to your property for free, how do they make their money?
In most cases, the person who arrives at your door is not a qualified surveyor. They are a salesperson — often working on commission. Their income depends on selling you a damp treatment package, which means they have a direct financial incentive to find problems, whether or not those problems genuinely exist.
This is the fundamental issue with free surveys. The person assessing your property benefits from diagnosing a problem, and specifically from diagnosing one that requires the treatment their company sells.
How the Commission Model Works
Many damp proofing companies operate on a model where the “surveyor” earns a percentage of the treatment they sell. The more expensive the job, the higher their earnings. This creates an obvious conflict of interest:
- No damp found = no sale = no commission
- Minor issue requiring ventilation improvement = small sale = small commission
- Rising damp diagnosed requiring full chemical DPC = large sale = large commission
It doesn’t take much imagination to see where the incentive lies.
Common Problems With Free Surveys
Misdiagnosis of Condensation as Rising Damp
This is arguably the most widespread problem in the damp proofing industry. Condensation is by far the most common cause of damp in UK homes, but it doesn’t require expensive chemical treatment — it requires better ventilation and heating management.
Rising damp, on the other hand, requires a chemical damp proof course (DPC) injection, which is a significantly more expensive treatment. Unscrupulous companies routinely diagnose condensation as rising damp because the treatment costs more.
Over-Treatment and Unnecessary Work
Even when a genuine damp issue exists, the recommended treatment should be proportionate. Common examples of over-treatment include:
- Full chemical DPC injection when the existing DPC simply needs external ground levels lowering
- Re-plastering entire rooms when only localised areas are affected
- Expensive tanking systems when simpler drainage improvements would solve the problem
- Timber treatment for woodworm that is no longer active
Reliance on Unverified Moisture Readings
Many free survey operatives use a basic pin-type moisture meter pressed against the wall surface and declare “rising damp” based on a single high reading. This is deeply misleading. Surface moisture readings can be elevated for many reasons — condensation, hygroscopic salts, plumbing leaks, or even recent plastering. A proper diagnosis requires multiple readings at different heights and depths, combined with environmental assessment.
What a Proper Independent Survey Looks Like
A genuine professional damp survey is a very different experience. Here is what you should expect:
Qualified Surveyor
The person inspecting your property should hold relevant qualifications — ideally a CSRT (Certificated Surveyor in Remedial Treatments) or equivalent, with membership of the Property Care Association (PCA). They should be able to explain their credentials if asked.
Calibrated Instruments
Professional surveyors use a range of calibrated equipment, not just a single moisture meter:
- Electrical resistance meters for initial screening
- Calcium carbide testing for accurate moisture content measurement
- Hygrometers to assess humidity and dew point
- Thermal imaging cameras to identify cold bridging and hidden moisture patterns
Detailed Written Report
A proper survey produces a comprehensive written report that includes:
- Clear identification of all damp types present
- Root cause analysis for each issue
- Moisture readings mapped across affected areas
- Recommended treatments with explanations
- Photographs documenting findings
- Priority guidance — what is urgent and what can wait
No Pressure to Commit
A legitimate surveyor presents their findings and recommendations without pressure. They are happy for you to take the report away, get a second opinion, or take time to consider your options. If someone is pushing you to sign on the spot, that is a sales tactic, not professional advice.
Questions to Ask Before Booking a Survey
Before accepting any damp survey — free or paid — ask these questions:
- What are the surveyor’s qualifications? Look for CSRT, CSSW, or PCA membership.
- Is the surveyor independent of the treatment team? If the same person diagnoses and sells the treatment, there is a conflict of interest.
- Will I receive a written report? If the answer is no, or “we’ll talk you through the findings verbally,” be wary.
- What equipment do you use? A basic pin meter alone is not sufficient for a reliable diagnosis.
- Is there any obligation to proceed with treatment? Any pressure to commit immediately is a warning sign.
The Real Cost of Getting It Wrong
The financial consequences of an incorrect damp diagnosis can be significant:
- Chemical DPC injection that wasn’t needed — typically between 2,000 and 5,000 pounds depending on the property
- Re-plastering with specialist render on top of the unnecessary DPC — adding further thousands
- The original problem persisting because the actual cause (often condensation or a maintenance issue) was never addressed
- Having to pay again for correct diagnosis and treatment when the first round of work fails
Beyond the financial cost, there is the disruption. Damp proofing work is invasive — it often means removing plaster, drilling into walls, and extensive redecoration. Going through that process for treatment you didn’t need is something no homeowner should have to experience.
Easy Damp’s Approach
At Easy Damp, we believe in honest, transparent assessments. Our damp surveys are carried out by qualified, experienced surveyors who will tell you exactly what they find — even if the answer is that you don’t need treatment.
We use professional-grade, calibrated equipment to ensure accurate diagnosis. You receive a detailed written report explaining our findings in plain English, with clear recommendations and no obligation to proceed.
If you do need treatment, we’ll explain exactly why and provide a fair, transparent quote. If you don’t, we’ll tell you that too — and advise you on any simple steps you can take to manage the issue yourself.
Don’t gamble your home on a free survey. Call Easy Damp on 0161 527 6777 or book a professional damp survey today for an honest, expert assessment you can trust.
