A facilities manager overseeing a 1980s concrete-panel office tower in Box Hill signs off on a facade remediation programme: spalling concrete repairs, sealant replacement across the expansion joints, and a pressure-clean of the precast panels before recoating. The scope looks routine. What the scope does not spell out is that grinding back delaminated concrete, cutting out old sealant beds, and abrasive-blasting masonry all liberate respirable crystalline silica, and that the moment those works begin, the building manager sits inside a chain of duty holders that WorkSafe Victoria can and does pursue. This is the quiet exposure that sits underneath a large share of building maintenance work in Melbourne, and it is one that facilities professionals are increasingly expected to understand rather than delegate blindly.

Silica dust is no longer a peripheral health-and-safety footnote. It has become one of the most actively enforced occupational hazards in Victoria, and the regulatory tightening of the past few years has moved the obligation squarely into the territory that property and facilities managers control: contractor selection, scope definition, and the verification of exposure controls before works commence. For anyone responsible for commercial, institutional, or strata buildings across Melbourne, understanding how respirable crystalline silica is generated, and what competent silica dust management and building maintenance actually require of a contractor, is now part of the core competency of the role.

This guide is written for facilities managers, property managers, building services coordinators, and owners corporation committees who engage contractors for facade repair, concrete remediation, sealant works, pressure cleaning of masonry, and the broader building maintenance programmes that keep a commercial asset weathertight and compliant. It sets out where this hazard comes from in this context, the Victorian regulatory framework that governs it, the exposure controls competent silica dust management and building maintenance demand, and the specific questions a duty holder should be asking before a single grinder touches a facade.

Where Silica Dust Comes From in Facade and Building Maintenance

Respirable crystalline silica is the fraction of silica dust small enough to penetrate deep into the lungs, generally particles below four microns in diameter. It is invisible in ordinary light, does not settle quickly, and can remain airborne long after the mechanical work that generated it has stopped. Crystalline silica occurs naturally in most of the materials that make up a commercial building envelope: concrete, mortar, render, brick, natural stone, and many engineered products. When those materials are cut, ground, drilled, abrasive-blasted, or otherwise mechanically disturbed, silica dust is released.

In the specific world of facade and building maintenance, the generating activities are numerous and often underestimated. Concrete spalling repair, one of the most common facade interventions on Melbourne’s stock of mid-century and later precast buildings, involves grinding back delaminated or carbonated concrete to sound substrate, an activity that produces high concentrations of silica dust at the operator’s breathing zone. Sealant replacement across expansion joints and window perimeters requires cutting out the old sealant bed, frequently disturbing the concrete or masonry substrate on either side. Pressure cleaning of masonry and render, particularly when done to remove coatings or heavy soiling before recoating, can aerosolise silica-laden particulate. Drilling for fixings, anchor installation, and facade-mounted equipment all generate dust at the point of penetration. Even abrasive cleaning intended to remove staining can liberate silica when the substrate itself is disturbed.

The building maintenance context makes this hazard distinctive in ways that matter for facilities managers. Much of this work happens at height, from rope access positions, elevating work platforms, or building maintenance units, which means the person generating the dust is often working in a confined, exposed position where control measures are harder to deploy and where the interaction between dust controls and height safety controls must be managed together rather than in isolation. A contractor who understands one but not the other is only half-competent, because effective silica dust management and building maintenance depend on treating the two as a single discipline.

The Overlap With Window Cleaning and Facade Access

Facilities managers sometimes assume respirable crystalline silica is a concern only for demolition or major construction, and therefore not relevant to the maintenance contractors who clean and maintain their glazing and facades. That assumption is where exposure gaps open up. The same contractor who performs high-rise window cleaning may also be engaged for facade repairs, sealant works, or the removal of hard mineral deposits from glass and its surrounds, and the transition from a low-dust task to a high-dust task can happen within a single site visit. As covered in our detailed breakdown of hard water stain removal on commercial glass, mineral deposits on and around glazing sometimes require mechanical or abrasive intervention on the adjacent masonry, which is precisely the kind of substrate disturbance that liberates respirable dust.

This is why a facilities manager benefits from engaging maintenance contractors whose competency spans both the access discipline and the exposure-control discipline. Rope access and abseiling work, elevating platform operation, and building maintenance unit use each carry their own regulatory weight, and layering silica dust controls on top of them requires an integrated approach to safe work planning rather than a bolt-on.

The Victorian Regulatory Framework for Silica Dust

Silica dust exposure in Victorian workplaces is governed by the Occupational Health and Safety Act 2004 and the Occupational Health and Safety Regulations 2017, administered and enforced by WorkSafe Victoria. Facilities managers do not need to become regulatory specialists, but they do need to understand the shape of the obligations, because those obligations reach the building owner and the person in control of the workplace, not merely the contractor holding the grinder, and they place silica dust management and building maintenance squarely within the duty holder’s remit.

The foundational duty sits in the OHS Act 2004. A person who has, to any extent, the management or control of a workplace must ensure, so far as is reasonably practicable, that the workplace and the means of entering and leaving it are safe and without risks to health. A facilities manager engaging a contractor to perform facade works is, in most arrangements, a person with management or control of that workplace, and that duty does not evaporate because a contractor has been engaged. The reasonably practicable standard requires the duty holder to take active steps to verify that risks, including the risk from crystalline silica, are being controlled.

The Workplace Exposure Standard and Its Tightening

The workplace exposure standard for respirable crystalline silica in Australia was halved to 0.05 milligrams per cubic metre averaged over an eight-hour day, a change that materially raised the bar for how much dust suppression and respiratory protection a task requires. A contractor performing dry grinding of concrete without controls will exceed that standard many times over. The tightening of the exposure standard is not an abstract regulatory number: it dictates the practical control measures a competent contractor must deploy, and it is the benchmark against which any air monitoring results are assessed.

Beyond the general exposure standard, Victoria has moved progressively to treat crystalline silica as a hazard requiring specific management. The framework around engineered stone attracted the most public attention, culminating in the national prohibition on the manufacture, supply, processing, and installation of engineered stone benchtops, panels, and slabs that took effect in 2024. While that prohibition targets engineered stone specifically, it signalled the regulatory direction of travel, and the broader duties around respirable crystalline silica in construction and maintenance work have been reinforced in parallel. Facade and building maintenance work sits within the construction and maintenance stream, and the duties there centre on identifying silica-generating tasks, assessing exposure, and implementing the hierarchy of control.

The Silica Dust Hazard and the Duty to Assess

Under the OHS Regulations 2017, an employer must identify hazards, assess the risks associated with them, and eliminate or reduce those risks so far as is reasonably practicable. For a contractor undertaking facade works, this means the silica hazard must be identified in the planning stage, the exposure assessed for the specific tasks and materials involved, and controls selected according to the hierarchy of control before work begins. A facilities manager reviewing a contractor’s documentation should expect to see the silica hazard explicitly named in the safe work method statement, not folded generically into a line about dust.

The Hierarchy of Control Applied to Silica Dust

The hierarchy of control is the structured order in which risks must be addressed: elimination first, then substitution, isolation, engineering controls, administrative controls, and personal protective equipment as the last line rather than the first. For silica dust in facade and building maintenance, this hierarchy translates into concrete, verifiable practices that define competent silica dust management and building maintenance, and that a facilities manager can look for.

Elimination and substitution are often limited in maintenance work, because the substrate is a fixed feature of an existing building. You cannot substitute the concrete panels of a 1980s tower. Where elimination is possible, it usually takes the form of choosing a method that does not disturb the silica-bearing substrate: selecting a chemical or lower-energy remediation approach over aggressive grinding, or specifying that a repair be cut with a method that keeps dust suppressed rather than dry-cutting. This is one reason scope definition matters so much at the facilities management level, because the method specified in the scope influences the exposure profile of the whole job.

Engineering controls are where the most consequential silica dust reduction happens on a live facade. On-tool water suppression, where water is fed to the cutting or grinding point to bind dust at the source, dramatically reduces airborne respirable crystalline silica. On-tool dust extraction, where a shrouded tool is connected to an H-class vacuum with appropriate filtration, captures dust before it disperses. Local exhaust ventilation, wet-cutting methods, and enclosure of the work zone where feasible all sit in this tier. A competent facade contractor arrives with these controls as standard equipment, not as an optional extra requested by the client.

Water Suppression, Extraction, and the Height Complication

The application of engineering controls becomes more demanding when the work is performed at height, which is the norm for facade and building maintenance. Feeding water to a grinding point while suspended on rope access, or running an H-class extraction unit from an elevating work platform, requires planning that a ground-level contractor may never have had to consider. This is precisely why the integration of silica dust controls with height safety practice separates specialist facade contractors from generalist ones. As set out in our guide to height safety compliance for Melbourne commercial buildings, the duty holder framework around working at height already imposes rigorous obligations, and silica dust control adds a further layer that must be planned into the same safe work method statement rather than treated as a separate afterthought.

For rope access work in particular, the IRATA framework under which competent rope access technicians operate demands methodical planning of every element of a suspended task. Adding silica suppression to that plan is entirely achievable for a properly equipped IRATA-certified team, but it is not something a contractor can improvise on the day. Facilities managers procuring facade works at height should specifically confirm that the contractor has performed silica-generating tasks from access positions before, rather than assuming that competence at height and competence at dust control automatically coexist.

Administrative controls sit above personal protective equipment in the hierarchy and include rotating workers to limit exposure duration, restricting access to the work zone, sequencing dusty tasks to minimise the number of people exposed, and thorough housekeeping to prevent settled silica dust from becoming airborne again. Respiratory protective equipment, correctly fit-tested and of an appropriate protection factor for the task, is the final layer, deployed in combination with the controls above it rather than as a substitute for them. A contractor whose entire silica strategy is a box of disposable masks has misunderstood the hierarchy of control, and a facilities manager who sees that should treat it as a red flag.

Air Monitoring and Health Surveillance Obligations

Where a competent person cannot be certain that exposure is below the workplace exposure standard, air monitoring is required to determine the actual airborne concentration of respirable crystalline silica. For facade works involving sustained grinding or cutting of silica-bearing materials, air monitoring is frequently warranted, and the results inform whether the controls in place are adequate or whether additional measures are needed. A facilities manager does not conduct this monitoring, but should expect a contractor performing significant silica-generating work to be able to explain their monitoring approach and to have monitoring data or a defensible assessment supporting their control selection.

Health surveillance is a related obligation. Workers who are or may be exposed to respirable crystalline silica above the relevant threshold are entitled to health monitoring, which for silica typically includes respiratory questionnaires, lung function testing, and low-dose high-resolution CT scanning at intervals. The purpose is to detect the early signs of silicosis and other silica-related disease before they become disabling. A contractor who takes silica dust seriously will have a health surveillance programme in place for exposed workers, and while a facilities manager is not the administrator of that programme, its existence is a signal of a contractor who genuinely manages the hazard rather than merely gesturing at it.

Why This Matters to the Duty Holder Specifically

The reason a facilities manager should care about a contractor’s air monitoring and health surveillance is not administrative curiosity. It is that the reasonably practicable duty under the OHS Act is assessed on what the duty holder knew or ought to have known and what steps they took. Engaging a contractor with no coherent silica management, on a job that plainly generates silica dust, is the kind of omission that becomes visible with clarity after an incident. Verifying a contractor’s silica dust management and building maintenance credentials is one of the reasonable steps that distinguishes a duty holder who has met their obligation from one who has not.

Silica Dust Management and Building Maintenance Planning

Silica dust management and building maintenance do not exist in isolation from the rest of a building maintenance programme. It intersects with facade condition, with the sequencing of works, and with the long-term asset management decisions a facilities manager makes across the life of a building. A facade that is allowed to deteriorate will eventually require more aggressive, more dust-intensive remediation than one maintained proactively, which means that a well-run maintenance programme actually reduces cumulative silica exposure over the life of the asset by keeping interventions smaller and less mechanically severe.

This connects to the broader discipline of facade inspection and planned maintenance. Identifying spalling concrete, failing sealant, and substrate deterioration early, through regular facade inspection, allows repairs to be scoped as controlled, contained interventions rather than emergency remediation. The condition of glazing seals and the integrity of the building envelope, subjects we have addressed in the context of glazing works and building maintenance elsewhere on this site, feed into the same planning discipline. As explored in our coverage of post-construction cleaning and defect identification, the baseline condition of a facade established at handover shapes the maintenance and remediation trajectory for years afterward, and a facilities manager who inherits a well-documented facade is better positioned to sequence future works in a way that keeps silica exposure controlled.

Pressure cleaning deserves specific mention here, because it is a task facilities managers frequently commission without recognising its silica potential. High-pressure cleaning of masonry, render, and concrete can liberate silica-bearing particulate, particularly when the pressure is high enough to erode the substrate surface or when it is used to strip coatings back to bare masonry. A contractor who treats pressure cleaning as a purely benign wet task, with no consideration of the respirable silica that aggressive pressure work can generate, has a gap in their hazard awareness that a discerning facilities manager should probe.

The Coastal and Environmental Overlay

Melbourne’s environmental conditions add texture to facade maintenance planning in ways that indirectly influence silica exposure. In the bayside and coastal corridor, salt air accelerates the deterioration of concrete, render, and sealant, which means facades in those suburbs tend to require more frequent remediation, and therefore present more frequent silica-generating tasks, than equivalent buildings inland. As discussed in our guide to window cleaning for coastal areas of Melbourne, the corrosive marine environment across the bayside suburbs drives a maintenance tempo that facilities managers in those areas need to plan around. More frequent facade intervention means more frequent silica exposure events, and a contractor working a coastal maintenance programme should have silica control embedded as routine practice rather than exceptional.

What Facilities Managers Should Verify Before Facade Works Begin

The practical takeaway for a facilities manager is a set of verification steps that turn the principles of silica dust management and building maintenance into due diligence you can actually perform. These are the checks that demonstrate a duty holder took reasonable steps, and they are equally the checks that separate a contractor who manages silica dust from one who exposes both their workers and their client to unacceptable risk.

First, confirm that the safe work method statement explicitly identifies respirable crystalline silica as a hazard for the specific tasks in scope, and sets out the control measures for each silica-generating activity. A generic dust line is not sufficient for grinding, cutting, or abrasive work on silica-bearing substrates.

Second, confirm that the contractor deploys engineering controls as standard: on-tool water suppression or on-tool dust extraction with H-class filtration, wet-cutting methods, and work-zone controls, rather than relying on respiratory protective equipment alone. Ask what equipment they bring and how it is deployed when the work is at height.

Third, confirm that respiratory protective equipment is fit-tested and appropriate to the task, not merely present. Fit-testing is a specific, documented process, and a contractor who cannot describe theirs is unlikely to be doing it.

Fourth, for substantial silica-generating works, ask about air monitoring and health surveillance. A contractor who performs regular facade remediation should be able to speak coherently to both. This is where the difference between a specialist facade and building maintenance contractor and a generalist becomes most visible.

Fifth, confirm that the dust controls are integrated with the height safety plan where the work is performed at height. The two disciplines must appear in the same planning, because deploying dust suppression from a suspended or elevated position is materially different from deploying it at ground level, and a contractor who has not thought this through will struggle on the day.

Building Silica Awareness Into Contractor Selection

Facilities managers who maintain a panel of maintenance contractors should build silica competency into their prequalification and selection process as a standing criterion, not a job-by-job scramble. A contractor who performs facade repair, concrete remediation, sealant works, and pressure cleaning across a portfolio of Melbourne commercial buildings should be able to demonstrate a coherent, documented approach to silica dust management and building maintenance, and asking to see it at the panel stage means the question is settled before an urgent job forces a rushed engagement. This is consistent with the broader procurement discipline we advocate: the more compliance verification is done up front, the less exposure the duty holder carries when works are commissioned under time pressure.

The link between silica management and the wider integrity of a contractor’s compliance system is worth stating plainly. A contractor with genuine, audited management systems, IRATA-certified rope access capability, and a documented approach to height safety is far more likely to have crystalline silica properly integrated into their planning than a contractor operating without those foundations. Silica competency is rarely an isolated strength: it tends to travel with a broader culture of compliance, and its absence tends to signal broader gaps.

The Cost of Getting Silica Dust Wrong

The consequences of inadequate silica dust control fall into three categories, and each of them lands, at least in part, on the duty holder. The first is human: silicosis is an incurable, progressive, and potentially fatal lung disease, and the workers who develop it are frequently those who were exposed years earlier on jobs where controls were absent or inadequate. Every facade remediation performed without proper dust control adds to a cumulative exposure that may not manifest as disease for a decade or more. This is the reason the regulatory response has been as forceful as it has.