Product Overview

Summary: This Roof Waterproofing Safe Operating Procedure sets out a clear, step-by-step method for planning and carrying out roof waterproofing works safely and effectively. It supports compliance with Australian WHS requirements while protecting workers from height-related risks and ensuring durable, watertight outcomes for commercial, industrial, and residential projects.

Roof waterproofing work combines high-risk construction activities with the use of chemical products, heat sources, and potentially fragile roof structures. Without a structured procedure, businesses are exposed to significant safety risks, including falls from height, slips on wet or contaminated surfaces, exposure to hazardous substances, fire from hot works, and damage to building fabric leading to costly water ingress issues. This Roof Waterproofing SOP provides a disciplined, repeatable approach that integrates WHS obligations with technical best practice for waterproofing across flat roofs, pitched roofs, balconies, and podium slabs.

Developed for Australian conditions, the procedure covers the full lifecycle of a roof waterproofing task: pre-start planning and risk assessment, verification of structural integrity and access, selection and handling of waterproofing systems (liquid membranes, sheet membranes, torch-on, and detailing products), environmental and weather considerations, and controlled application methods. It also defines clear roles and responsibilities, required permits (including work at height and hot work where relevant), PPE requirements, quality checks, and documentation. By implementing this SOP, businesses can demonstrate due diligence under WHS legislation, reduce rework and warranty claims arising from leaks, and provide consistent training material for new and existing workers across different sites and projects.

Key Benefits

• Reduce the risk of falls from height and other serious incidents during roof waterproofing works.
• Ensure consistent, high-quality waterproofing installations that minimise leaks, call-backs, and warranty claims.
• Demonstrate compliance with Australian WHS legislation and relevant Codes of Practice for construction work and working at height.
• Standardise training and supervision across crews, subcontractors, and multiple project sites.
• Improve planning around weather, access, and product selection to avoid delays, product failures, and damage to building assets.

Who is this for?

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

Hazards Addressed

• Falls from roofs, ladders, scaffolds, and elevated work platforms
• Falls through fragile roofing materials such as skylights, fibre cement sheeting, and brittle metal decking
• Slips and trips on wet, uneven, or contaminated roof surfaces
• Exposure to hazardous chemicals, solvents, and isocyanates in waterproofing products
• Fire and burns from torch-on membranes, heat guns, or other hot work activities
• Manual handling injuries from lifting and moving rolls, buckets, and equipment
• Heat stress, sun exposure, and dehydration when working on exposed roofs
• Electrical shock from overhead powerlines, solar installations, or concealed services
• Environmental contamination from spills, wash-down water, and incorrect disposal of chemical waste

Included Sections

• 1.0 Purpose and Scope
• 2.0 References, Standards and Legislative Requirements
• 3.0 Definitions and Types of Roof Waterproofing Systems
• 4.0 Roles, Responsibilities and Competency Requirements
• 5.0 Pre-Start Planning and Risk Assessment
• 6.0 Site Access, Edge Protection and Fall Prevention Controls
• 7.0 Required Tools, Equipment and Personal Protective Equipment (PPE)
• 8.0 Product Selection, Handling and Storage of Waterproofing Materials
• 9.0 Roof Inspection, Surface Preparation and Substrate Verification
• 10.0 Weather, Environmental and Structural Considerations
• 11.0 Step-by-Step Roof Waterproofing Application Procedure
• 12.0 Working at Heights, Fragile Roofs and Rescue Planning
• 13.0 Hot Work Controls for Torch-On and Heat-Based Systems (if applicable)
• 14.0 Hazardous Chemicals Management and Spill Response
• 15.0 Quality Control, Testing and Defect Rectification
• 16.0 Clean-Up, Waste Management and Environmental Protection
• 17.0 Documentation, Records and Photographic Evidence
• 18.0 Training, Induction and Review of the SOP
• 19.0 Emergency Procedures and Incident Reporting

Legislation & References

• Work Health and Safety Act 2011 (Cth) and corresponding state and territory WHS legislation
• Work Health and Safety Regulations 2011 (Cth) – including provisions for construction work and high risk work
• Safe Work Australia – Code of Practice: Managing the Risk of Falls at Workplaces
• Safe Work Australia – Code of Practice: Construction Work
• Safe Work Australia – Code of Practice: Managing Risks of Hazardous Chemicals in the Workplace
• AS/NZS 1891 series: Industrial fall-arrest systems and devices
• AS/NZS 5532: Manufacturing requirements for single-point anchor device used for harness-based work at height
• AS/NZS 1715: Selection, use and maintenance of respiratory protective equipment
• AS/NZS 2161 series: Occupational protective gloves
• AS 4654.2: Waterproofing membranes for external above-ground use – Design and installation
• AS 3740: Waterproofing of domestic wet areas (for interface and detailing considerations)
• AS/NZS 3012: Electrical installations – Construction and demolition sites