Product Overview

Summary: This Waterproofing Techniques Safe Operating Procedure sets out a clear, step-by-step method for planning and carrying out waterproofing works safely, correctly and in line with Australian standards. It helps construction and maintenance teams control WHS risks, prevent building defects and water ingress, and protect both workers and property across residential, commercial and civil projects.

Waterproofing is a critical activity in Australian construction and maintenance, particularly given exposure to heavy rainfall, coastal conditions and extreme temperature variations. When waterproofing is carried out without a structured procedure, the result can be leaks, mould growth, concrete cancer, electrical hazards and costly rework — often emerging years after completion. This Waterproofing Techniques Safe Operating Procedure provides a robust, repeatable framework that integrates WHS risk controls with technical quality requirements, so that work is not only compliant but durable and safe.

The SOP guides your team through every stage of the task: from pre-start planning, substrate preparation and product selection, through to application methods, curing times, inspection and documentation. It embeds controls for working at heights, confined spaces, hazardous chemicals and hot work, tailored to common Australian construction environments such as balconies, rooftops, basements, plant rooms and wet areas. By adopting this procedure, organisations can demonstrate due diligence under WHS legislation, reduce waterproofing failures and defects, and provide clear evidence of compliance for certifiers, auditors and insurers.

This document is designed to support both experienced trades and newer workers, providing plain-language instructions, checklists and acceptance criteria aligned with Australian Standards and NCC requirements. It helps standardise how waterproofing is planned, executed and signed off across multiple sites, improving safety performance, build quality and client confidence.

Key Benefits

• Ensure waterproofing works are completed safely, consistently and in accordance with relevant Australian Standards and WHS laws.
• Reduce the risk of leaks, structural damage, mould growth and costly post-completion rectification works.
• Standardise training and on-site practices so all workers follow the same proven waterproofing techniques and safety controls.
• Demonstrate due diligence to regulators, certifiers, clients and insurers through clear procedures, records and inspection points.
• Improve coordination between waterproofers, builders, electricians, plumbers and other trades to minimise rework and interface failures.

Who is this for?

• Waterproofing Technicians
• Construction Site Supervisors
• Project Managers
• Builders and Building Contractors
• Facilities and Asset Managers
• Strata and Property Managers
• WHS Managers and Safety Advisors
• Quality and Compliance Managers
• Apprentice Tradespeople in Construction

Hazards Addressed

• Exposure to hazardous chemicals in waterproofing membranes, primers, solvents and sealants (inhalation, skin and eye contact)
• Fire and explosion risks from flammable liquids, adhesives and hot-applied membranes
• Falls from height when waterproofing roofs, balconies, podiums and external façades
• Slips, trips and falls on wet, uneven or cluttered work surfaces
• Manual handling injuries from lifting and handling rolls, drums, buckets and equipment
• Confined space risks in basements, pits, service shafts and plant rooms
• Respiratory hazards from vapours, dusts and inadequate ventilation
• Electrical hazards from working near live services, penetrations and plant
• Heat stress and UV exposure during external waterproofing in hot Australian conditions
• Environmental contamination from improper storage, use or disposal of waterproofing products and wash‑water

Included Sections

• 1.0 Purpose and Scope
• 2.0 References, Definitions and Applicable Standards
• 3.0 Roles, Responsibilities and Competency Requirements
• 4.0 Pre-Start Planning and Risk Assessment (SWMS/JSA)
• 5.0 Required Tools, Equipment and Personal Protective Equipment (PPE)
• 6.0 Product Selection, Handling and Storage Requirements
• 7.0 Site Preparation, Substrate Assessment and Surface Conditioning
• 8.0 Waterproofing Techniques and Application Methods
• 9.0 Environmental Conditions, Curing Times and Protection of Works
• 10.0 Working at Heights, Confined Spaces and Hazardous Chemicals Controls
• 11.0 Quality Control, Inspection, Testing and Acceptance Criteria
• 12.0 Interface Management with Other Trades and Building Elements
• 13.0 Waste Management, Spill Response and Environmental Protection
• 14.0 Emergency Procedures and Incident Reporting
• 15.0 Training, Consultation and Communication
• 16.0 Documentation, Records and Continuous Improvement

Legislation & References

• AS 3740: Waterproofing of domestic wet areas
• AS 4654.1: Waterproofing membranes for external above-ground use – Materials
• AS 4654.2: Waterproofing membranes for external above-ground use – Design and installation
• AS 4858: Wet area membranes
• National Construction Code (NCC) – Performance Requirements for waterproofing and dampness
• Work Health and Safety Act 2011 (Cth) and equivalent state and territory WHS Acts
• Work Health and Safety Regulations 2011 (Cth) and equivalent state and territory WHS Regulations
• Safe Work Australia – Managing Risks of Hazardous Chemicals in the Workplace Code of Practice
• Safe Work Australia – Managing the Risk of Falls at Workplaces Code of Practice
• AS/NZS 1715: Selection, use and maintenance of respiratory protective equipment
• AS/NZS 2161: Occupational protective gloves
• AS/NZS 1891: Industrial fall-arrest systems and devices