Mould Remediation — Safe Work Method Statement
Safe Work Method Statement for removing mould-affected building materials and cleaning mould contamination after water damage, including containment, negative air, removal of porous materials, cleaning, drying and clearance.
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Mould remediation is common after leaks, floods and long-term condensation. The main health risk comes from breathing in spores and fragments released when mouldy materials are disturbed. These can trigger asthma, allergic reactions and respiratory irritation, and some moulds can cause serious infections in people with weakened immune systems. Mould remediation is not, by itself, a type of High Risk Construction Work under the WHS Regulations, so a SWMS is not legally required for the mould work alone. It is still good practice, and principal contractors, insurers and building managers usually ask for one.
The job often comes with HRCW-type hazards that do require a SWMS: water-damaged buildings built before the end of 2003 may contain asbestos in wet area linings, eaves, vinyl floor tiles and their backing, so check the asbestos register or have suspect materials tested before cutting or removing anything. Ceiling and subfloor work can bring fall and electrical risks, and some subfloors meet the definition of a confined space. If any of these apply, list the relevant HRCW in this SWMS.
There is no Australian Standard specifically for mould remediation; many contractors follow the IICRC S520 standard as industry practice. The basic method is consistent: fix the moisture source first, contain the work area, run HEPA-filtered negative air, remove porous materials that are mouldy (plasterboard, carpet, insulation, underlay), HEPA vacuum and clean hard surfaces, dry the structure to target moisture levels, and verify with an inspection or clearance testing before rebuilding. Biocides and antimicrobials are hazardous chemicals and must be used according to their SDS; they do not replace physical removal.
Workers should be trained in containment, respiratory protection and decontamination. Respirators must be fit tested, and workers with asthma or immune conditions should not do this work without medical advice.
Customise this template with the affected areas and the size of the mould growth, the moisture source and how it has been fixed, the asbestos and lead check results, the containment and negative air layout, the respirator type, the chemicals and SDS references, target moisture readings, and the clearance or verification method.
Personal Protective Equipment
Risk Assessment
1.Assessment and hazard check before work
| Hazard / Risk | Initial Risk | Control Measures | Residual Risk | Responsibility |
|---|---|---|---|---|
| Asbestos in water-damaged materials disturbed | High | Check the asbestos register or have suspect materials sampled before cutting or removing linings, floor coverings or eaves. If asbestos is present, stop and engage a licensed removalist for those materials. | Low | Supervisor |
| Electric shock from water-affected wiring | High | Have a licensed electrician check and isolate circuits in water-affected areas. Use RCD-protected leads for all equipment. | Low | Supervisor / Licensed Electrician |
| Moisture source not fixed, mould returns | Moderate | Identify and repair the leak or moisture source before remediation. Record moisture readings. | Low | Supervisor / Plumber |
2.Containment and negative air set-up
| Hazard / Risk | Initial Risk | Control Measures | Residual Risk | Responsibility |
|---|---|---|---|---|
| Spores spread to clean areas of the building | High | Isolate the work area with polythene sheeting and sealed seams. Turn off and seal HVAC returns serving the area. Run HEPA air scrubbers to keep the area under negative pressure, exhausting outside or to a clean area. Set up a decontamination zone at the exit. | Low | Remediation Technician |
| Occupants exposed | Moderate | Keep occupants out of the containment and adjacent areas during removal. Signage at entry points. | Low | Supervisor |
3.Removing mould-affected porous materials
| Hazard / Risk | Initial Risk | Control Measures | Residual Risk | Responsibility |
|---|---|---|---|---|
| Inhalation of spores and dust during removal | High | Mist surfaces lightly before removal to limit spore release. Cut plasterboard in large sections rather than breaking it up. Fit-tested respirator and disposable coveralls worn throughout. Bag waste in heavy-duty plastic inside containment, seal and wipe bags before removal. | Low | Remediation Technician |
| Cuts from tools and exposed fixings | Moderate | Use hand saws or tools with dust extraction. Gloves. Remove or bend over exposed nails. | Low | Remediation Technician |
| Fall through ceiling when working above | High | Remove ceiling linings from below using platform ladders or mobile scaffolds. Do not walk on ceiling joists. | Low | Remediation Technician |
4.Cleaning hard surfaces and applying antimicrobials
| Hazard / Risk | Initial Risk | Control Measures | Residual Risk | Responsibility |
|---|---|---|---|---|
| Chemical exposure from biocides and cleaners | Moderate | Use products according to the SDS. Never mix bleach with other cleaners. Ventilate and wear gloves and goggles. Keep products labelled and stored away from occupants. | Low | Remediation Technician |
| Residual mould left on framing | Moderate | HEPA vacuum, damp wipe and repeat HEPA vacuum framing and hard surfaces. Sand or replace timber where growth has penetrated. | Low | Remediation Technician |
5.Drying and dehumidification
| Hazard / Risk | Initial Risk | Control Measures | Residual Risk | Responsibility |
|---|---|---|---|---|
| Overloaded circuits or tripping hazards from drying equipment | Moderate | Plan power supply for the number of dehumidifiers and fans. Use tested leads routed clear of walkways. | Low | Remediation Technician |
| Heat and humidity in enclosed areas | Moderate | Schedule breaks outside containment. Drinking water available. Watch for heat stress symptoms when wearing coveralls and respirators. | Low | Supervisor |
6.Verification, decontamination and waste disposal
| Hazard / Risk | Initial Risk | Control Measures | Residual Risk | Responsibility |
|---|---|---|---|---|
| Contamination carried out on clothing and equipment | Moderate | HEPA vacuum and remove coveralls at the decontamination zone. Bag disposable PPE. Wipe tools before leaving. Remove respirator last. | Low | Remediation Technician |
| Rebuild starts before area is clean and dry | Moderate | Visual inspection and moisture readings to target levels. Clearance testing by an independent assessor where specified. Containment removed only after sign-off. | Low | Supervisor / Independent Assessor |
Relevant Codes of Practice
Worker Acknowledgement
By signing below, I confirm that I have read, understood and agree to comply with this Safe Work Method Statement.