Why Free Damp Surveys Are Never Really Free

The phrase "free damp survey" appears on the website of almost every damp proofing company in the country. It sounds like a sensible first step — get an expert opinion at no cost before deciding what to do.

But a free damp survey from a damp proofing company is not a survey. It’s a sales visit. And the "free" part is paid for by you further down the line.

The Business Model Behind Free Surveys

Damp proofing companies make their money from selling and installing treatments — chemical DPC injection, tanking membranes, replastering, timber treatment. The survey itself generates no income. So why offer it for free?

Because the survey is the sales funnel. The surveyor — who is typically a salesperson with some technical training, not a qualified independent specialist — visits your home with one objective: to identify work they can quote for.

That is not a criticism of any individual. It’s simply how the business model works. The company cannot afford to send staff to properties for free if those visits don’t generate revenue. The expectation is that a percentage of free surveys result in paid remedial work. That’s the commercial logic.

The problem is that this creates a direct conflict of interest. The person diagnosing your damp problem profits from finding one — and from prescribing an expensive solution.

What the Research Shows

Independent surveys consistently find that the majority of damp problems diagnosed by remedial companies as rising damp are actually something else — condensation, penetrating damp through defective building fabric, plumbing leaks, or drainage issues.

These alternative causes are frequently far cheaper to resolve — often requiring ventilation improvements, gutter repairs, or repointing rather than a full chemical DPC installation costing £3,000–£8,000.

In practice, what this means is that a significant proportion of homeowners who act on a free survey recommendation and commission the resulting work are paying for treatment they didn’t need.

The Tactics to Watch For

If you do get a free survey, be aware of the following common approaches:

The basic moisture meter reading. A cheap moisture meter pressed against a wall will register elevated readings in almost any older property. Without understanding why those readings are elevated — hygroscopic salts, condensation, genuine structural moisture — the reading alone is meaningless. Presenting a meter reading as proof of rising damp is misleading.

The bundle quote. Rather than isolating the specific cause, the quote covers a range of treatments "just to be safe." This dramatically inflates the cost of work and ensures the company gets maximum revenue from the visit.

The guarantee. A 20- or 30-year guarantee on damp proofing work sounds reassuring. In practice, these guarantees are from the company itself (not an insured third party), are frequently conditional on the treated area not being disturbed, and expire if the company ceases trading.

The urgency. Suggesting that the problem is severe and will rapidly worsen without treatment is a common pressure tactic. Genuine damp problems rarely require emergency action.

What an Independent Survey Gives You Instead

An independent damp survey has no commercial interest in the outcome. Richard Bull MISSE doesn’t sell treatments, doesn’t recommend specific contractors, and has no referral arrangements with remedial companies. The fee covers the survey and report — nothing else.

What you get is a diagnosis. The actual cause of the moisture in your property, explained clearly, with the evidence to support it — thermal images, moisture readings, photographic documentation — and a prioritised recommendation for what to do.

In many cases, that recommendation involves relatively minor works. In some cases, the honest answer is that no work is needed at all.

That’s the value of genuine independence.

Book an Independent Survey in the Midlands

Richard Bull carries out independent damp surveys across Derby, Nottingham, Leicester, and the wider Midlands. Call 07983 550 662 or enquire via the contact form.