Why Asbestos Must Be Identified Before Demolition in WA
Demolition work doesn’t create asbestos risk, it exposes it. The real issue is whether asbestos-containing materials (ACM) have been properly identified before structural disturbance begins. When they haven’t, demolition becomes one of the highest-risk activities for uncontrolled fibre release.
Many commercial and industrial buildings across Australia still contain legacy materials installed before asbestos bans were introduced. These materials are not always obvious. They can be concealed behind walls, above ceilings, within plant, or integrated into building components such as insulation, flooring, and cement sheeting. Without a structured pre-demolition assessment, these materials are often only discovered once work is underway—at which point control becomes significantly more difficult.
This is where pre-demolition asbestos surveys play a critical role. Unlike routine or management surveys, pre-demolition surveys are intrusive by design. They are intended to locate all reasonably accessible ACMs within the scope of planned works, including those hidden within the structure. This may involve opening up walls, accessing service cavities, and inspecting areas that would not typically be disturbed during normal occupancy. The objective is simple: identify asbestos before demolition does.
From a compliance perspective, this process is not optional. Australian workplace health and safety laws require duty holders to identify hazardous materials, including asbestos, prior to demolition. Guidance from Safe Work Australia makes it clear that demolition must not proceed until asbestos risks are assessed and controlled. In practice, this means engaging competent professionals to undertake surveys and ensuring findings are documented in a way that informs removal and demolition planning.
Early identification directly influences how a project is sequenced. Where ACMs are confirmed, they must be removed under controlled conditions before demolition activities begin. This allows for the establishment of appropriate exclusion zones, use of licensed asbestos removalists, and implementation of air monitoring where required. It also ensures that clearance certification can be achieved before structural works disturb previously contaminated areas.
The alternative - discovering asbestos during demolition - introduces immediate disruption. Work typically stops while the site is reassessed, additional controls are implemented, and specialist contractors are mobilised. This not only affects program timelines, but can also lead to increased costs, regulatory scrutiny, and potential exposure risks if materials have already been disturbed.
Pre-demolition surveys also provide clarity for all parties involved in the project. Engineers, demolition contractors, and project managers can plan their work with a clear understanding of where asbestos is located and how it will be managed. This reduces uncertainty on site and supports better coordination between trades, particularly in complex or staged demolitions.
Verification is another key component. Following removal, air monitoring and clearance inspections help confirm that areas are safe to proceed. This step provides a defensible basis for transitioning from asbestos removal to demolition, ensuring that risk has been actively managed rather than assumed.
It’s also worth recognising that not all surveys are equal. The quality of a pre-demolition asbestos survey depends on the competency of the assessor, the scope of the inspection, and how well the findings are communicated. Incomplete or overly conservative surveys can either miss critical risks or create unnecessary constraints on the project. A thorough, well-executed survey strikes the balance, comprehensive enough to identify hazards, but practical enough to support efficient delivery.
Ultimately, pre-demolition asbestos surveys are about control and certainty. They shift asbestos risk from an unknown variable to a defined, manageable part of the project. When carried out properly, they protect workers, support compliance, and allow demolition works to proceed with confidence that hazardous materials have been addressed before they can become a problem.