Product Overview

Summary: This Waterproofing Systems Safe Operating Procedure sets out a clear, step‑by‑step method for planning, installing, inspecting and maintaining waterproofing works in Australian workplaces. It helps businesses control safety, structural and moisture-related risks while ensuring installations meet WHS obligations, relevant Australian Standards and warranty requirements.

Waterproofing failures are one of the most common and costly defects in Australian buildings, often leading to structural damage, mould growth, slip hazards and major rectification works. This Waterproofing Systems Safe Operating Procedure provides a practical, WHS‑aligned framework for carrying out waterproofing works safely and correctly across bathrooms, balconies, rooftops, basements, plant rooms and external podiums. It guides workers from pre‑start planning and substrate preparation through to application, curing, quality checks and documentation, reducing the risk of leaks, rework and safety incidents on site.

Developed for the Australian construction and maintenance environment, the SOP integrates manufacturer requirements with WHS duties and key Australian Standards. It addresses common on‑site challenges such as working in confined or poorly ventilated areas, managing flammable or solvent‑based products, controlling slips and trips on wet surfaces, and coordinating with other trades. By implementing this procedure, organisations can standardise waterproofing practices across projects, support competency‑based training, and demonstrate due diligence to clients, certifiers and regulators.

The document is particularly valuable for businesses seeking to lift installation quality while tightening safety controls around chemical handling, working at height and manual handling. It also supports defensible record‑keeping, helping you prove that installations were carried out in accordance with manufacturer data sheets, Australian Standards and WHS requirements, protecting both your workforce and your business reputation.

Key Benefits

• Ensure waterproofing works are planned and executed in line with Australian Standards, manufacturer instructions and WHS obligations.
• Reduce the risk of leaks, structural damage, mould growth and costly rectification by standardising installation and inspection steps.
• Improve worker safety when handling waterproofing chemicals, working at heights and operating in confined or wet areas.
• Streamline training and onboarding by providing clear, repeatable instructions for technicians, supervisors and subcontractors.
• Demonstrate due diligence to clients, certifiers, insurers and regulators through consistent documentation and quality records.

Who is this for?

• Waterproofing Technicians
• Construction Site Supervisors
• Project Managers
• Building Contractors
• Facilities and Maintenance Managers
• WHS Advisors and Safety Officers
• Strata and Property Managers
• Quality and Compliance Managers

Hazards Addressed

• Exposure to hazardous chemicals, solvents, primers and adhesives
• Inhalation of vapours in poorly ventilated or confined spaces
• Skin and eye contact with irritant or corrosive waterproofing products
• Fire and explosion risks from flammable liquids and vapours
• Slips, trips and falls on wet, uneven or contaminated surfaces
• Falls from height when waterproofing roofs, balconies and external podiums
• Musculoskeletal injuries from manual handling of heavy membranes, buckets and equipment
• Use of powered tools for surface preparation (grinders, scarifiers, heat guns)
• Heat stress and dehydration when working outdoors or on exposed rooftops
• Environmental contamination from spills, wash‑water and waste disposal

Included Sections

• 1.0 Purpose and Scope
• 2.0 Definitions and Types of Waterproofing Systems
• 3.0 Roles, Responsibilities and Competency Requirements
• 4.0 Applicable Legislation, Standards and Manufacturer Requirements
• 5.0 Pre‑Start Planning and Risk Assessment
• 6.0 Site Preparation, Access and Coordination with Other Trades
• 7.0 Substrate Inspection, Testing and Surface Preparation
• 8.0 Selection of Waterproofing System and Materials
• 9.0 Required Tools, Equipment and Personal Protective Equipment (PPE)
• 10.0 Safe Handling, Storage and Mixing of Waterproofing Products
• 11.0 Step‑by‑Step Application Procedure for Membranes and Systems
• 12.0 Controls for Working at Heights, Confined Spaces and Hot Conditions
• 13.0 Ventilation, Fire Safety and Hazardous Chemical Controls
• 14.0 Curing, Protection of Finished Membranes and Traffic Management
• 15.0 Inspection, Testing (e.g. flood testing) and Quality Assurance Checks
• 16.0 Non‑Conformance, Defect Management and Rectification
• 17.0 Environmental Management, Spill Response and Waste Disposal
• 18.0 Emergency Procedures, First Aid and Incident Reporting
• 19.0 Training, Induction and Competency Verification
• 20.0 Recordkeeping, Checklists and Document Control

Legislation & References

• AS 3740: Waterproofing of domestic wet areas
• AS 4654.1 & AS 4654.2: Waterproofing membranes for external above‑ground use
• AS 4858: Wet area membranes
• AS 3600: Concrete structures (for substrate and detailing considerations)
• AS/NZS 2311: Guide to the painting of buildings (surface preparation and coating practices)
• Model Work Health and Safety Act (as implemented in each state and territory)
• Model Work Health and Safety Regulations (Hazardous Chemicals, Construction Work, Falls)
• Safe Work Australia – Code of Practice: Managing Risks of Hazardous Chemicals in the Workplace
• Safe Work Australia – Code of Practice: Managing the Risk of Falls at Workplaces
• Safe Work Australia – Code of Practice: Confined Spaces
• Safe Work Australia – Code of Practice: How to Manage Work Health and Safety Risks