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 do our inspections investigate mould?

Our team uses thermal imaging to identify temperature variations and records relative humidity at several points, providing evidence that helps guide appropriate next steps.