Asbestos cement materials, including dividing fences and roofing, are commonly found in older properties. These products contain asbestos fibres bound within a cement matrix and are considered to pose a low risk while in good condition. However, deterioration caused by age, weathering, impacts, fire damage, or general wear can increase the risk of asbestos fibre release.
The preferred management option for all asbestos-containing materials is removal and replacement wherever practicable. This is particularly important for asbestos roofs, which are continually exposed to sunlight, rain, wind, and temperature fluctuations. Over time, these conditions can cause roofing materials to deteriorate and become friable, increasing the likelihood of asbestos fibre release and secondary contamination of the property. Asbestos roofs also cannot be cleaned effectively without disturbing the material. Abrasive cleaning or high-pressure cleaning is prohibited under the Health (Asbestos) Regulations 1992 and is highly likely to result in the release of asbestos fibres.
In some circumstances, where immediate removal is not feasible and the material remains in a stable condition, measures such as painting or sealing exposed edges may help minimise fibre release. However, these measures should be regarded as temporary controls rather than long-term solutions.
Where asbestos cement products are found to be severely deteriorated, considered friable, or fire damaged, the City may issue a notice requiring the asbestos to be removed, for dividing fences notice would be served on all affected owners.