Introduction to IAQ and Mould

Mould is one of the most significant drivers of poor indoor air quality (IAQ) in Australian residential and commercial buildings. Understanding its health impacts and how it spreads is essential for effective remediation.

Health Effects
Mould releases mycotoxins and spores that can cause respiratory illness, allergic reactions, and, in vulnerable individuals, even serious infections.
High-risk types of mould commonly found in water-damaged buildings include Stachybotrys, Aspergillus, and Chaetomium.
Australian workplace exposure standards set by Safe Work Australia include general dust and particle limits that apply to mould-affected environments.

Indicators of Mould in Indoor Air Quality (IAQ)
Elevated spore levels compared to outdoor air
Musty or earthy smells, usually caused by microbial volatile organic compounds (MVOCs)
Visible staining or discolouration on walls, ceilings, or soft materials

Mould cannot be properly removed with surface cleaning alone. Effective IAQ remediation requires identifying and fixing the moisture source, removing contaminated materials, and confirming that air quality has returned to safe levels.