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Condition 2 Mould Clean in a Kirrawee Apartment After Water Damage
By Michael Nguyen | Indoor Environmental Professional (IEP) | IICRC WRT, AMRT, ASD (69486970) | Mould Testing Technician (NAT10913005) | Licensed Builder NSW 392154C (Supervisor, KBL+RENO)
On 9 November 2026 we carried out a Condition 2 mould clean in an apartment in Kirrawee, in the Sutherland Shire. The apartment had been through a water damage event, and the initial mould remediation had already been completed.
Follow-up air testing still showed some elevated fungal spores. The levels were below the hygienist's threshold, so this was not a failed clearance. As a precaution, the hygienist asked for a whole-apartment Condition 2 clean, followed by ongoing monitoring. This case study covers why, how we did it and what it cost.
The Job: Spores Still Elevated After Remediation
After water damage and remediation, fine spores and mould fragments can settle on walls, ceilings, ledges and floors. Air testing picks these up even when there is no active growth left. A secondary source is also possible, so the hygienist's plan had two parts: clean every surface to remove settled spores, then keep monitoring the air.
Under ANSI/IICRC S520, Condition 2 means an area contaminated with settled spores that came from a Condition 3 area (actual mould growth). It is cleaned, not stripped out. Our Condition 2 mould explainer covers this in more detail.
What We Did
We followed the hygienist's instructions and the S520 approach for Condition 2 cleaning, room by room:
HEPA air scrubbers in every room: one 500 CFM HEPA air scrubber per room, running the whole time to capture spores disturbed during cleaning.
HEPA vacuum: walls, ceilings and floors vacuumed with a Numatic H-class vacuum fitted with a new brush head.
Damp wipe: every surface wiped down using Actichem Thymox as the wetting agent, with a flat mop on an extension pole for walls and ceilings.
HEPA vacuum again: a second H-class pass to pick up anything loosened by the wipe. This vacuum, wipe, vacuum order is the HEPA sandwich method.
PPE: hooded disposable coveralls, gloves and boot covers.
Why an H-Class Vacuum and a New Brush Head?
H-class vacuums are made for hazardous dust. Their sealed HEPA filtration stops fine particles being blown back into the room, which is exactly what a household vacuum can do with mould spores. We fitted a new brush head on this job so nothing from an earlier site could be carried into the apartment.
What Happens Next
On the hygienist's instructions, post-remediation verification (PRV) was not required for this job. Spore levels were already below the threshold and the clean was a precaution. The hygienist will keep monitoring the air. If a secondary source shows up, it can be found and fixed at the source.
What This Job Cost
This Condition 2 clean cost $1,800 + GST.
Our mould inspection and quote are free. Professional moisture and mould reports start from $500 + GST. We service Kirrawee and the rest of the Shire. See our Sutherland Shire mould removal page, or learn more about our mould removal service.
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About the Author
Michael Nguyen is the director of AAA Mould Removal and leads our water damage and mould remediation work across Sydney. His qualifications include:
Indoor Environmental Professional (IEP) – Testing Water-Damaged Buildings, Australian College of Environmental Studies (RTO 21740), 2026. Includes nationally recognised units NAT11429003 Conduct a comprehensive mould and moisture assessment and NAT11429007 Conduct post remediation verification mould testing (11429NAT Advanced Diploma of Building Biology)
IICRC Water Damage Restoration Technician (WRT)
IICRC Applied Microbial Remediation Technician (AMRT)
IICRC Applied Structural Drying (ASD), IICRC no. 69486970
Mould Testing Technician (NAT10913005)
Licensed Builder NSW 392154C (Supervisor, Kitchen, Bathroom & Laundry and Renovation)
Carpentry Licence
Worried About Mould or Water Damage?
Call AAA Mould Removal on 1300 739 783 or contact us online. We will find the moisture, remove the mould properly and dry your home to IICRC standards.
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