If your property was built or last re-roofed before the 1990s in Australia, there is a real chance the roof, or other parts of the home, may contain asbestos. Many houses from that era used asbestos cement sheeting, often called fibro, in roofing, eaves, and cladding. This guide explains the common warning signs, where else to check around the property, and why professional testing, not guesswork, is the only reliable way to confirm what you are dealing with.
Why Do So Many Older Australian Homes Have Asbestos Roofing?
For decades, asbestos was used widely in building materials because it improved durability, heat resistance, and strength at a low cost. As a result, asbestos containing materials were manufactured and installed across residential and commercial buildings until the material was eventually banned. Asbestos refers to a group of naturally occurring fibres that become dangerous once disturbed. If a material containing asbestos is broken, drilled, sanded, or cut, fibres can become airborne and inhaled without anyone realising it has happened.
What Are the Common Signs of an Asbestos Roof?
Physical clues can help you form a reasonable suspicion, but they are rarely conclusive on their own. Here are the signs worth assessing.
Does the Age of the Home Matter?
Age is the single biggest indicator. If your roof was installed before 1990, it is sensible to assume it could contain asbestos until it has been proven otherwise through testing.
What Does the Roof Profile and Texture Tell You?
- Older asbestos roofs often have a corrugated profile similar to metal, but the sheets tend to look more matte and feel more rigid
- Weathered asbestos cement often appears grey, may look chalky, and can hold surface dust
- You may notice green growth such as moss or lichen due to moisture retention on the surface
- Fibro sheeting can become more brittle with age, particularly at edges, laps, and around fixing points
What Do the Fixings and Sheet Size Reveal?
- Many older asbestos sheets were nailed down rather than screwed, while modern metal roofs typically use screwed fasteners
- Older fibro sheets can be noticeably larger in length and width compared with many modern roofing panels
- Some older products were sold under specific names such as Super Six and often carried identifying marks or codes
If you notice several of these signs together, it is reasonable to suspect asbestos and move on to safer verification steps rather than continuing to guess.
Where Else Around the Property Might Asbestos Be Found?
A roof is rarely the only place asbestos was used on an older property. On homes of a similar age, asbestos cement products were also commonly used in:
- Eaves and soffit linings
- External walls and cladding sheets
- Older fences and shed panels
- Wet areas such as bathrooms, behind wall tiles
- Backing boards near older heaters or switchboards
If your home matches the age profile and these materials appear in multiple locations, it strengthens the case that your roof sheeting may also contain asbestos.
How Can You Tell Asbestos Roofing Apart From Metal Roofing?
Asbestos roofing and old metal sheeting can look surprisingly similar from ground level, especially after decades of weathering. Useful visual differences include a matte, fibrous appearance rather than a reflective metal finish, a cement-like texture closer to thin concrete than steel, a chalky and dusty surface built up from long-term weathering, and greater moss or lichen retention in green patches. Even so, you cannot reliably confirm asbestos by appearance alone, especially once paint, dirt, and past repairs are factored in.
Why Shouldn’t You Climb Into the Roof Space to Check?
In short, do not. Even if the roof appears to be in good condition, disturbing it to look for a stamp, code, or batch number on the underside of a sheet increases the risk of exposure. Accessing tight ceiling spaces and touching old materials raises the chance of releasing dust or breaking a corner of brittle sheeting. If you need certainty, arrange a professional inspection and laboratory testing instead of investigating it yourself.
Why Is Laboratory Testing the Only Reliable Way to Confirm Asbestos?
If you genuinely need to identify asbestos, laboratory testing of a small, safely obtained sample is the only reliable method available. This matters because the health impact is not theoretical. Inhaling asbestos fibres can lead to serious long-term health risks, including lung cancer and other asbestos-related disease, which is why collecting a sample yourself is never worth the risk.
What Happens After Asbestos Is Confirmed on Your Roof?
If testing confirms asbestos is present, the next step depends on the condition of the material and your plans for the property.
What If the Roof Is in Good Condition?
Many older roofs are non-friable asbestos, typically asbestos cement sheeting where the fibres are bound into the cement matrix. When it is sealed and in good condition, the immediate risk is generally lower than damaged material, though it remains potentially hazardous if disturbed during renovation, storm damage, or repair work.
What If the Roof Is Damaged or You Are Renovating?
If sheets are cracked, breaking apart, or you are planning upgrades, replacement is usually the safest long-term decision. Asbestos removal must be managed correctly by licensed professionals, and the waste must be handled and disposed of through approved channels. If you are planning a safer upgrade path, options worth exploring include a full roof replacement, re-roofing services, or an upgrade to Colorbond roofing or Zincalume roof replacement.
What Should You Do If You Suspect Asbestos on Your Roof?
- Do not cut, drill, sand, pressure clean, or patch the roof sheeting
- Keep people away from any broken areas and avoid disturbing dust
- Arrange an inspection and testing plan through licensed professionals
- If replacement is confirmed, choose a provider that can coordinate safety and compliance from start to finish, such as an asbestos roof replacement specialist
If your roof is being replaced anyway, it is also a sensible time to consider comfort upgrades such as roof insulation or roof ventilators, along with roofline extras like fascia capping while the roof is already off.
Why Guttering and Roofline Edges Matter When Asbestos Is Present
Older roofs often have ageing edges, flashing, gutters, and fascia areas where cracks and dust can accumulate over time. Managing water flow and run-off properly also helps protect the wider building envelope and reduce further deterioration risk around a suspected asbestos roof. If you are planning to refresh the exterior of your home as part of a roofing project, related work such as commercial guttering, gutter replacement, and fascia capping are all worth considering alongside a roof upgrade, rather than treating each element as a separate, unrelated job.
For a safe, professional assessment of your roof, start at fortified.com.au or contact the team directly.
Works Cited
Asbestos Safety and Eradication Agency. “About Asbestos.” Australian Government, www.asbestossafety.gov.au. Accessed 17 July 2026.
Safe Work Australia. “Asbestos.” Safe Work Australia, www.safeworkaustralia.gov.au. Accessed 17 July 2026.
Workplace Health and Safety Queensland. “Asbestos.” Queensland Government, www.worksafe.qld.gov.au. Accessed 17 July 2026.
