Asbestos Risk Assessments &
Hazardous Materials Risk Assessments
Asbestos: A Once Popular Material
Asbestos is a naturally occurring mineral fibre that was historically mined and utilised by many industries across the globe. Its properties, such as flexibility, strength, affordability, and insulation from heat and electricity, made it a popular choice in construction and manufacturing.
Australia’s Asbestos Use
Australia had one of the highest rates of asbestos use per person in the world up until the mid-1980s. In 1983 Woodsreef mine closed which was the last asbestos mine in Australia. Additionally, from 1930 to 1983, Australia imported around 1.5 million tonnes of asbestos, which was used in a variety of applications, particularly in the construction of homes and buildings.
The Ban on Asbestos
Types of Asbestos
The Asbestos Safety and Eradication Agency (ASEA) lists six types of asbestos mineral fibres, which include:
- Chrysotile (white asbestos)
- Amosite (brown or grey asbestos)
- Crocidolite (blue asbestos)
- Tremolite
- Actinolite
- Anthophylite
Asbestos-Containing Materials (ACMs)
ACMs are categorized into two types:
- Non-friable asbestos: These are products that contain asbestos fibres mixed with other materials, such as cement. They are commonly found in buildings across Australia. If damaged, they can release asbestos fibres into the air.
- Friable asbestos: These materials can be easily crumbled or reduced to powder and are more likely to become airborne. Examples include insulation materials.
Asbestos Sample Testing Form
Asbestos in Australian Homes
The ASEA estimates that approximately one-third of all homes in Australia contain asbestos products. Homes built before 1990 are particularly likely to contain asbestos-containing materials.
Common Locations for Asbestos in Homes Asbestos can be found in various parts of a home, including:
- Roofing and gutters
- Gables and eaves
- Walls
- Vinyl, carpet, and tile underlay
- Lining behind wall tiles
- Imitation brick cladding
- Fencing
- Sheds
- Splashbacks in wet areas
- Telecommunications pits
- Some window putty
- Expansion joints
- Packing under beams
- Concrete formwork
Resources
For further information, the ASEA provides additional resources:
Details about Asbestos sources
Asbestos Cement Sheets in Outbuildings
Outbuildings such as garages, workshops, or garden sheds often have walls and roofs made from asbestos cement sheets. These structures were commonly erected in the mid-20th century when asbestos materials were popular due to their durability and fire resistance.
Asbestos in Backyard Soil
In some cases, asbestos-contaminated soil can be found in backyards, particularly if the area has a history of asbestos waste disposal or if materials containing asbestos have deteriorated or been broken up and mixed with the soil.
Roofing and Gutters
Asbestos cement was commonly used in roofing and gutters in Australian homes built before the 1980s. These materials were favored for their durability and resistance to fire. Over time, weathering can cause these materials to deteriorate, releasing asbestos fibres into the air. It’s particularly risky during home renovations or demolitions when the material is disturbed.
Gables and Eaves
Gables and eaves may also contain asbestos cement materials. These areas are prone to wear and tear due to exposure to the elements, which can lead to the release of asbestos fibres during maintenance work. It’s important to inspect these areas regularly and to handle any repairs with caution.
Walls
Asbestos was used in the fibro sheeting of walls, particularly in post-war housing. The presence of asbestos in walls poses a significant risk during renovations, drilling, or cutting, as these activities can release asbestos fibres into the home environment.
Vinyl, Carpet, and Tile Underlay
Asbestos-backed vinyl sheet flooring and the adhesives used to stick down tiles and carpets were common in homes. If these flooring materials are in good condition, they may not pose an immediate risk, but if they are disturbed or removed, they can release dangerous fibres.
Lining Behind Wall Tiles
Asbestos was often used in the adhesive or backing of wall tiles. Renovations that involve removing tiles can disturb these asbestos-containing materials, necessitating professional assessment and removal.
Fencing
Asbestos fences were common in Australia. If these fences are left undisturbed and in good condition, they may not pose a significant health risk. However, if they are damaged or removed, they can release asbestos fibres.
Sheds
Many Australian sheds and outbuildings were constructed with asbestos-containing materials. As these structures age or are subjected to damage, they can become a source of asbestos fibre release.
Telecommunications Pits
Asbestos was used in some telecommunications pits and conduits. Workers need to be cautious when accessing these areas to avoid exposure to asbestos fibres.
Some Window Putty
Older window putty may contain asbestos. When windows are replaced or putty is removed, it can release asbestos fibres if not handled properly.
Concrete Formwork
Asbestos was sometimes used in concrete formwork as a molding agent. Cutting or breaking up old concrete formwork can release asbestos fibres.
Did you know…?
Testing and removal of asbestos from your investment property or your home, if it is also a place of business, could be tax deductible.
Common Asbestos Containing Materials in Houses
Asbestos cement sheeting
Asbestos cement sheeting
Asbestos cement sheeting
Asbestos cement sheeting
Asbestos cement sheeting
Asbestos cement sheeting
Corrugated asbestos cement sheeting
Corrugated asbestos cement sheeting
Corrugated asbestos cement sheeting
Fibrous cement pipe
Fibrous cement pipe
Laminated cement sheet
Laminated cement sheet
Vinyl coverings
Vinyl coverings
Vinyl coverings
Vinyl coverings
Zelemite electrical board/millboard
Zelemite electrical board/millboard
Mastic sealant
Mastic sealant
Mastic sealant
Mastic sealant
More Information
The Australian Government Department of Health through the Australian Health Protection Principal Committee have developed a brochure with detailed information for householders and the general public. The brochure is comprehensive and easy to read.