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Step by Step Safe work Procedure for Black Mould removal in NZ

Safety 1st Removals Ltd

Safe Work Procedure for Black Mould Removal in New Zealand:

1. Purpose: To provide clear instructions for the safe removal and cleanup of black mould (often associated with the species Stachybotrys chartarum) in New Zealand to prevent health hazards and ensure environmental safety.

2. Scope: This procedure is applicable for residential, commercial, and public spaces.

3. Required Tools and Materials:

  • Protective clothing: P2/N95 face mask, rubber gloves, safety goggles, and a disposable overalls or old clothing
  • Plastic bags for waste
  • Soap and water or detergent
  • A scrub brush
  • 5% bleach solution (5% bleach and 95% water) or commercial mould remover
  • Plastic or polythene sheeting
  • Duct tape
  • Bucket
  • Spray bottle
  • HEPA-filtered vacuum (for large areas)

4. Procedure:

4.1 Preliminary Steps:

  1. Identify and fix the source of moisture causing the mould growth.
  2. Inform all occupants of the area about the cleanup work.
  3. Ensure proper ventilation in the area by opening windows and doors.
  4. Turn off HVAC systems to prevent the spread of spores.

4.2 Preparation:

  1. Lay plastic or polythene sheeting on the ground to catch any falling mould debris.
  2. Seal off the affected area using the plastic sheets and duct tape to contain mould spores.
  3. Place all tools and materials inside the containment area.

4.3 Mould Removal:

  1. Put on the protective clothing: mask, goggles, gloves, and overalls.
  2. Lightly mist the mouldy area with water to prevent mould spores from becoming airborne.
  3. Use soap and water or detergent to scrub away the mould. For stubborn areas, use a 5% bleach solution or a commercial mould remover.
    • Note: Never mix bleach with other cleaning products as it can produce toxic fumes.
  4. Clean the area thoroughly to remove all mould and mould stains.
  5. Rinse the area with clean water and wipe it dry with clean towels or cloths. Ensure all moisture is removed.
  6. If dealing with larger areas, after manual cleaning, a HEPA-filtered vacuum can be used to ensure the removal of any remaining mould debris.

4.4 Waste Disposal:

  1. Double-bag all cleaning materials, protective clothing, and any mouldy items in plastic bags.
  2. Seal the bags with duct tape.
  3. Dispose of the bags as per local regulations for mould-contaminated waste.

4.5 Decontamination:

  1. Clean all tools and equipment with a 5% bleach solution or commercial mould remover.
  2. Rinse and dry all items properly.
  3. HEPA vacuum the containment area (if used).
  4. Remove and dispose of the plastic or polythene sheeting.

4.6 Completion:

  1. Turn the HVAC system back on after ensuring all areas are dry.
  2. Monitor the area for signs of mould return, especially if there are any moisture issues.

5. Post-Removal:

  • Consider repainting walls with mould-resistant paint.
  • Ensure ongoing ventilation and moisture control in the area to prevent mould regrowth.
  • Be vigilant in checking for leaks, condensation, or any moisture accumulation.

6. Health and Safety Precautions:

  • If the mould-affected area is large (e.g., over 1 square meter), it's recommended to hire professionals who specialize in mould remediation.
  • Avoid exposure to mould, especially if you are allergic or asthmatic. Seek medical advice if you exhibit any symptoms like coughing, wheezing, eye irritation, or skin rashes after mould exposure.

John Kerr of Safety 1st Removals Ltd says This procedure is based on general guidelines and practices. Always refer to the New Zealand Building Code, local council guidelines, and any other relevant regulations before proceeding with mould removal.



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