Surveyor inspecting a wall with a moisture meter during an assessment
Process

What Happens During a Professional Mould Assessment?

19 March 2025 5 min read

If you've never had a mould or damp assessment before, it's natural to wonder what will happen when the specialist arrives. Understanding the process can help you prepare and get the most value from the visit.

1. Discussion of the problem

The specialist will usually start by asking about the history of the problem — when you first noticed it, which rooms are affected, whether it comes and goes with the seasons, and any events such as leaks or building work. The more detail you can provide, the more accurate the diagnosis.

2. Visual inspection

They will inspect the affected rooms and look for patterns — where the mould is concentrated, whether there are tide marks, water stains, peeling plaster or condensation. They will also look at the outside of the property for defects such as damaged pointing, cracked render, leaking gutters or bridged damp-proof courses.

3. Moisture testing

Using a moisture meter, the specialist will take readings from walls, skirting boards and ceilings to map where moisture is present and how deep it goes. This helps distinguish between surface condensation and deeper damp problems. A hygrometer may be used to measure the temperature and relative humidity in the room.

4. Identifying the cause

Combining the visual evidence and the meter readings, the specialist will form a view on the underlying cause — condensation, penetrating damp, rising damp, a plumbing leak, or a combination. This diagnosis is the most important part of the visit, because it determines the correct treatment.

5. Recommendations and quotation

Finally, you'll receive a clear explanation of what they found and a written recommendation for treatment, along with a no-obligation quotation. A good specialist will explain what work is needed, why, and what it will and won't include, so you can make an informed decision.

How to prepare

  • Make sure the specialist can access all affected rooms and the outside of the property.
  • Have any photos you've taken ready to show.
  • Note down when the problem started and anything that seems to make it better or worse.
  • Prepare any questions in advance.

Through Yorkshire Mould Removal, your enquiry is passed to a vetted independent specialist covering your area, who will arrange and carry out the assessment. There is no obligation to proceed with any recommended work.

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Yorkshire Mould Removal is an independent enquiry and referral service. With your permission, your information may be shared with a vetted local specialist so they can contact you regarding an assessment and quotation. We do not directly employ technicians.

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