What Happens After a Positive Mould Test: Removal, Remediation & Verification

Jay Raval

A mould test result isn’t the finish line – it’s the starting point for fixing the problem properly. Here’s what the process looks like from a positive result through to a verified, mould-free property.

Step 1: The Scope of Works

Your mould inspection report should include a clear scope of works – which areas need remediation, what materials need to be removed versus cleaned, and any root-cause repairs required (e.g. fixing a leak or improving ventilation) so the mould doesn’t return.

Step 2: Engaging a Remediation Contractor

iOHC doesn’t carry out physical mould removal – this keeps our testing independent and free of conflict of interest. We prepare reports and scopes to IICRC S500 and S520 standards specifically so any qualified remediation contractor can quote and carry out the work against a clear, defensible brief.

Step 3: Remediation Work

Remediation typically involves containment (to stop spores spreading to unaffected areas during the work), removal of contaminated materials, HEPA-filtered cleaning, and repair of the underlying moisture source.

Step 4: Post-Remediation Verification

This is the step most commonly skipped – and the one that matters most. Post-remediation verification testing confirms the remediation actually brought contamination back to acceptable levels, rather than just taking the contractor’s word for it. We recommend this for every remediation project, particularly where the property will be re-let, sold, or re-occupied by vulnerable individuals.

Why Independent Verification Matters

If the same company that removed the mould also verifies its own work, there’s an inherent conflict of interest. An independent, third-party verification test gives property owners, tenants, and insurers confidence the job was actually completed to standard.

Book Post-Remediation Testing in Brisbane

iOHC provides independent post-remediation verification testing across Brisbane and South East Queensland, prepared to IICRC S500/S520 standards. Contact us for a quote or read our complete guide to mould testing and inspection to understand the full process from first inspection through to verification.