Description

PAG 04, Why Colour and Visual Inspection Are Not Valid Safety Assessments, addresses one of the most persistent misconceptions in damp and mould work: the belief that colour tells you how dangerous mould is. Using the guide’s discussion of pigmentation, hidden contamination, and non-visual risk, it explains why white, pale, grey, green, brown, or black growth can all be clinically significant under different conditions. The publication shows why statements such as “it’s not black mould” provide no reliable safety assessment and why visual judgement alone is an unsafe basis for reassurance, remediation decisions, or enforcement. This legacy edition is intended for readers who need a clearer understanding of the limits of appearance-based assessment in environmental health and building-related illness.