Mould and Moisture Assessment
Summary
A mould and moisture assessment is an investigation undertaken to identify mould growth and the underlying moisture conditions contributing to it within a building or indoor environment. The assessment focuses on understanding the source, extent and risk associated with both visible and concealed mould, as well as the moisture pathways driving its growth.
Mould and moisture assessments are commonly required following water damage, persistent condensation issues, building defects or concerns regarding indoor air quality and occupant health.
Definition
A mould and moisture assessment is a structured evaluation of mould growth, moisture presence and building conditions that influence fungal growth. The assessment typically involves visual inspection, moisture measurements and, where appropriate, targeted sampling of air, surfaces or materials.
The primary purpose is to identify the cause of mould growth and provide practical recommendations for remediation and long-term moisture control.
Why Mould and Moisture Assessments Matter
From a health perspective, mould growth can impact indoor air quality and contribute to respiratory irritation, allergic reactions and discomfort, particularly for sensitive occupants.
From a building performance perspective, mould is almost always a symptom of an underlying moisture issue. Without identifying and addressing moisture sources—such as leaks, rising damp, condensation or inadequate ventilation—mould is likely to recur even after removal.
Mould and moisture assessments provide clarity in situations involving insurance claims, building defects, workplace concerns or post-remediation verification by defining the extent of impact and appropriate corrective actions.
When a Mould and Moisture Assessment Is Typically Required
A mould and moisture assessment is commonly required where:
Visible mould growth is observed indoors
Water damage, flooding or leaks have occurred
Ongoing condensation or dampness is present
Occupants report health, odour or comfort concerns
Remediation works are planned or have been completed
Independent assessment is required for insurance or property matters
The scope of assessment is typically tailored to building use and risk profile.
Typical Components of a Mould and Moisture Assessment
Depending on site conditions, a mould and moisture assessment may include:
Visual inspection of affected and adjacent areas
Moisture measurements of building materials
Identification of moisture sources and pathways
Assessment of ventilation and indoor conditions
Targeted air, surface or material sampling where appropriate
Risk-based recommendations for remediation and moisture control
Sampling is generally used to support professional judgement rather than as a standalone indicator.
Legislative and Regulatory Context
While there is no single mould-specific regulation in Australia, mould and moisture issues are addressed through work health and safety obligations, building standards and indoor environmental quality guidance.
Duty holders are required to manage risks to occupant health where indoor environmental conditions may cause harm. Mould and moisture assessments support compliance with these general obligations.
How We Can Help
Confluence Environmental undertakes mould and moisture assessments as part of indoor environmental quality and occupational hygiene services.
Our services typically include:
Independent mould and moisture investigations
Assessment of indoor air quality where required
Advice on remediation scope and sequencing
Post-remediation inspection and verification
Clear reporting to support insurers, owners and occupants
We focus on practical assessments that address both mould impacts and their underlying causes.
Related Terms and Concepts
Indoor Air Quality
Occupational Hygiene
Air Monitoring
Environmental Monitoring
Building Condition Assessment
Post-Remediation Verification