Plasterboard Setting / Flushing / Stopping SWMS

Plasterboard setting, flushing and stopping is the wet-trade finishing phase that follows board fix, involving three-coat jointing compound application, embedding paper or fibreglass tape, building up corner beads, and progressively sanding to a Level 4 or Level 5 finish. The task generates significant respirable dust loads from dried joint compound and any residual gypsum-silica content, requires extensive work from stilts, hop-ups, trestles and step ladders to reach ceilings and wall heads, and exposes workers to repetitive overhead manual handling across full shifts. Under WHS Regulation 2025 r291, work performed at heights where a person could fall more than two metres constitutes High Risk Construction Work, and a SWMS must be prepared, communicated to all workers, and kept available for inspection before work commences. Respirable dust exposures, ladder-based access and overhead postural loading further compound the legal obligation on the PCBU to document hazards, controls and worker consultation in a SWMS that is reviewed at each significant change of conditions.

Hazards identified

7 hazards covered, sorted by priority.

Control measures

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

1. 1Elimination — Specify factory pre-finished panels or off-site jointed modular wall systems at design stage to remove on-site sanding and overhead trowelling entirely.
2. 2Elimination — Schedule plastering after all other overhead trades complete so trestles and stilts are not required around active scaffolds or live services.
3. 3Substitution — Use low-dust premixed jointing compounds (dustless formulations) and wet-edge sponging techniques in place of dry abrasive sanding wherever Level 4 finish permits.
4. 4Substitution — Replace open-bucket mixing with sealed cartridge or pre-mixed pail systems to reduce airborne dust during compound preparation and clean-up.
5. 5Engineering — Use H-class HEPA-filtered vacuum sanders coupled to pole sanders for all dry sanding, with extraction tested per AS/NZS 60335.2.69 before each shift.
6. 6Engineering — Provide mobile scaffold or proprietary fold-out platforms with guardrails for ceiling work above 2 metres in lieu of stilts wherever access geometry permits.
7. 7Administrative — Conduct documented pre-start briefing on this SWMS, rotate workers between sanding and trowelling tasks to limit dust exposure, and maintain housekeeping every two hours.
8. 8Administrative — Restrict stilt use to workers trained and assessed as competent, prohibit stilts on cluttered or sloped floors, and enforce two-handed ladder climbing with 3-points of contact.
9. 9PPE — Issue P2 half-face respirators (fit-tested under AS/NZS 1715) during all sanding, sealed safety eyewear to AS/NZS 1337.1, and nitrile gloves for wet compound handling.
10. 10PPE — Provide non-slip safety footwear with reinforced ankle support for stilt work, hi-vis where shared with other trades, and knee protection for low-level bead and skirting joints.

Applicable Codes of Practice

High-Risk Construction Work triggered

Worked example

On a four-storey apartment fit-out, the plastering leading hand opens this SWMS at the Monday pre-start brief with a crew of three finishers tasked with second-coating ceilings and upper walls across two units. Walking through the hazard register, the crew confirms ceiling heights at 2.7m trigger a high risk construction work category, so stilts will be used in the open living areas while a mobile platform is set up in the narrow ensuites where stilt balance is compromised. The dust hazard row prompts the supervisor to verify each worker's P2 respirator fit-test record is current and to connect the pole sander to the H-class vacuum before any sanding begins. Each worker signs the SWMS sign-on register acknowledging the controls. Mid-morning, a tiler begins setting out in the adjacent bathroom and water is tracked onto the finishing floor — the leading hand pauses work, returns to the SWMS, and documents an amendment under the slip hazard control: floor wiped down, walk-off mats placed, and stilts prohibited in that zone until dry. The amendment is initialled by all affected workers before flushing resumes, demonstrating the SWMS functioning as a live, consultative document rather than a filed compliance artefact.

Related legislation

• WHS Act 2011 (model)
• WHS Regulation 2025
• Managing the Risk of Falls at Workplaces CoP

Frequently asked questions