Membrane Roofing Installation SWMS

Membrane roofing installation involves applying waterproof sheet systems — typically TPO, PVC, EPDM, or torch-on modified bitumen — to commercial and residential roof decks. The work combines heat welding or open-flame torching, solvent-based adhesives and primers, mechanical fastening, and prolonged exposure on elevated substrates. Workers move heavy rolls across pitched or fragile surfaces, operate LPG torches near combustible insulation and timber, and handle hot bitumen or hot-air welders that reach 400–600°C. The combination of fall exposure, ignition sources, flammable vapours, and radiant heat makes membrane roofing one of the highest-consequence tasks in the roofing trade.

Under the Work Health and Safety Regulation 2025 (NSW), section 291 defines high risk construction work to include work involving a risk of a fall of more than 2 metres, work in an area with a contaminated or flammable atmosphere, and work in artificial extremes of temperature. Membrane roofing routinely engages all three. Section 299 requires a Safe Work Method Statement to be prepared before the work commences, kept accessible, and complied with. Controls must follow the hierarchy in section 36, prioritising elimination and engineering solutions over administrative measures and PPE.

Hazards identified

12 hazards covered, sorted by priority.

Control measures

Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.

1. 1Eliminate torch-on application where feasible by specifying self-adhered, mechanically fastened, or hot-air welded membrane systems that remove open-flame ignition sources from the roof.
2. 2Substitute high-VOC solvent primers and adhesives with low-VOC or water-based alternatives listed on the manufacturer's SDS; procure the lowest-hazard product that meets the specification.
3. 3Install perimeter guardrails, scaffold, or edge protection compliant with AS/NZS 4994.1 before any roof access; cover or rail all penetrations, skylights and fragile surfaces per AS 1657 prior to membrane work commencing.
4. 4Where edge protection is not reasonably practicable, use a travel-restraint or fall-arrest system anchored to certified anchor points designed and installed to AS/NZS 5532, with harnesses and lanyards to AS/NZS 1891.1; document a rescue plan before work starts.
5. 5Implement a documented hot works permit for all torch-on activity: 30-minute post-work fire watch, 9 kg dry-chemical extinguisher and charged hose within 5 metres, combustibles cleared or protected within a 10 metre radius, and thermal imaging inspection of cavities before leaving site.
6. 6Store and use LPG cylinders in accordance with AS/NZS 1596: upright, secured, in ventilated locations, with regulators and hoses inspected each shift and tested with soapy water; isolate cylinders at the valve during breaks.
7. 7Provide mechanical lifting (crane, hoist, or powered roller) for membrane rolls over 25 kg; use two-person lifts, roll dollies, and pre-cut lengths to minimise carrying on the deck.
8. 8Manage heat exposure under a written heat stress procedure: reschedule to early-morning shifts when forecast exceeds 32°C on the deck, mandate hydration breaks every 30 minutes, provide shaded rest areas, and monitor workers for symptoms per the SafeWork NSW Managing the risks of working in heat guidance.
9. 9Test suspected asbestos-containing materials before disturbance; where confirmed, engage a licensed asbestos removalist under Chapter 8 of the WHS Regulation 2025 (NSW) and follow the How to Safely Remove Asbestos Code of Practice.
10. 10Control respirable crystalline silica during any deck cutting or grinding using on-tool water suppression or H-class local exhaust ventilation, with P2 respiratory protection to AS/NZS 1716 and fit-testing to AS/NZS 1715; comply with the workplace exposure standard of 0.05 mg/m³ 8-hour TWA.
11. 11Issue task-specific PPE: heat-resistant gloves, long sleeves in flame-retardant fabric for torch work, safety footwear to AS/NZS 2210.3, UV-rated eye protection to AS/NZS 1337.1, sunscreen, and A1P2 organic-vapour respirators to AS/NZS 1716 when applying solvent primers.
12. 12All workers hold CPCCWHS1001 (White Card); the SWMS is developed in consultation with workers under section 47 of the WHS Act 2011 (NSW), signed before work starts, and reviewed under section 302 of the WHS Regulation 2025 (NSW) whenever the system, substrate, weather envelope, or crew changes, or after any incident.

Applicable Codes of Practice

High-Risk Construction Work triggered

Worked example

A three-worker crew from a Parramatta-based roofing contractor is engaged to install a torch-on modified bitumen membrane over a 620 m² concrete deck on a two-storey warehouse in Silverwater. The eaves height is 7.8 metres and the deck contains four skylight penetrations and a plant platform. Before commencing, the site supervisor confirms perimeter scaffold with mid-rails and toe boards is erected to AS/NZS 4994.1, all skylights are rail-protected, and two certified anchor points are installed for the primer and detailing work near the parapet. The SWMS is walked through with each worker, signed, and posted at the site shed. Two 45 kg LPG cylinders are stored upright in a ventilated cage 6 metres from the roof access ladder. A hot works permit is issued each morning, with a 30-minute post-work fire watch and thermal imaging of the parapet cavity before crew departure. On day three, forecast peaks at 36°C; the supervisor reschedules torch work to 06:00–11:00 under the heat stress procedure and reviews the SWMS under section 302 to reflect the revised shift pattern.

Related legislation

• Work Health and Safety Act 2011 (NSW)
• Work Health and Safety Regulation 2025 (NSW)
• Environmental Planning and Assessment Act 1979 (NSW)
• Protection of the Environment Operations Act 1997 (NSW)
• Dangerous Goods (Road and Rail Transport) Act 2008 (NSW)
• Home Building Act 1989 (NSW)

Frequently asked questions