Common Causes of Mould Growth

Persistent black mould (typically Aspergillus or Stachybotrys chartarum) is not just unsightly — it poses severe respiratory health risks for infants, asthma sufferers, and elderly occupiers. Under the Homes (Fitness for Human Habitation) Act, landlords are legally obligated to trace and fix mould causes.

The Three Key Trigger Factors:

1. Continuous High Humidity: Relative humidity levels sustained above 70% support airborne spore generation.
2. Cold Bridge Structures: Uninsulated outer concrete lintels or wall corners create localized surfaces reaching dew point temperatures.
3. Lack of Background Ventilation: Sealed double glazing and draft-exclusion keep stale, damp air trapped in the building.

How our surveys diagnose mould?

Our team utilizes thermal imaging cameras to locate cold spots (where insulation has settled or thermal bridging occurred) and tracks relative humidity over several points, providing clear, actionable pathways for mould remediation.