Mould Science

Mould growth, damp, and why evidence matters

Mould problems are usually linked to moisture, ventilation, temperature, building defects, or water ingress. Testing helps add measurable evidence.

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Aerolyse research note

Why mould grows

Mould can grow where moisture is present for long enough. Common contributors include leaks, condensation, poor ventilation, cold surfaces, flood events, damaged materials, and unresolved damp.

Why visual inspection is not always enough

Visible mould tells part of the story, but it may not show the extent of contamination, the condition after cleaning, or whether an air sample suggests wider exposure. Testing can support clearer records.

What testing adds

Mould testing measures markers associated with mould contamination in selected surface or air samples. It does not identify mould species. Results provide measurable evidence for the sampled location and should be read with property observations and repair history.

Testing is not a replacement for urgent repairs, medical advice, or statutory housing duties. See Testing Compliance for report boundaries.

Moisture

Start with the source

Leaks, condensation, ventilation defects, and cold surfaces can all create the conditions for mould growth. Testing should be read with the building context.

Evidence

Record the conditions

Photographs, sample locations, moisture observations, and occupant information help explain what the results relate to.

After Works

Verify remediation

Post-remediation checks can support close-out records after cleaning, drying, or repair work has been completed.

Useful Note

Practical follow-up

Next useful record

Take dated photos, record moisture sources, keep repair notes, and avoid cleaning the sample area immediately before a planned inspection.

Concerned about mould or air quality?

Aerolyse can help confirm whether mould, air, bacterial, or post-remediation testing is appropriate.

Book testing Contact Aerolyse

Sampling and results

Postal testing is for suitable surface samples. Airborne mould testing requires Aerolyse to attend the property. Sample analysis and your test result are included. Detailed written interpretive reports are available separately for an additional charge.