According to NSW Government figures, roughly 1 in 3 houses in NSW built or renovated between 1945 and 1990 are estimated to contain asbestos, and roofing is one of the most commonly identified locations. Before booking a Sydney Asbestos Inspection for your property, it helps to understand what to look for on your roof, and just as importantly, what visual clues genuinely can and can’t tell you. Roofing generates its own distinct set of questions too, since it isn’t just the sheeting itself, corrugated panels, eaves, gutters, downpipes, and roof cavity insulation can all be separate sources worth checking.
How Do I Know If My Roof Contains Asbestos?
The strongest indicator is the age of your property. If your home was built or last re-roofed before 1990, there’s a genuinely meaningful chance your roofing contains asbestos, particularly if it’s corrugated cement sheeting rather than metal or tile. NSW Government guidance explicitly lists roofing among the most common locations for asbestos-containing materials in homes from this era. That said, age alone can only guide your level of suspicion, confirming asbestos content requires a sample tested by a licensed assessor.
What Does an Asbestos Roof Look Like?
Asbestos cement roofing typically appears as corrugated grey sheeting, though painted, coated, or weathered roofs can look quite different from raw, unfinished material. It’s rigid and relatively heavy for its thickness compared to modern lightweight roofing products, and ridge capping, the curved pieces along the roof’s peak, was frequently made from the same asbestos cement material as the main sheets.
Do Old Corrugated Roof Sheets Contain Asbestos?
Often, yes, if they predate the mid-1980s to 1990. Corrugated asbestos cement roofing, widely known by the product name “Super Six,” was extremely common across Australian homes for decades. NSW Government guidance specifically identifies corrugated roofing as a typical example of non-friable, or bonded, asbestos, meaning the fibres are locked into the material and generally low risk if left undisturbed and in good condition.
Does Super Six Roofing Contain Asbestos?
Yes, Super Six is specifically the branded name for the original corrugated asbestos cement roofing product, manufactured from the 1950s through to around the mid-1980s. After this period, visually similar asbestos-free corrugated fibre cement products took its place, meaning a corrugated roof’s manufacture date matters considerably more than its general corrugated appearance when judging asbestos likelihood.
Are Old Roof Sheets Asbestos?
Potentially, yes, though “old” alone isn’t a precise enough marker without knowing roughly when the roof was installed. Any corrugated cement roofing installed before 1990 warrants treating as suspect until tested, particularly if the property hasn’t had a full re-roof since that time.
How Can I Tell If Roof Sheeting Is Asbestos?
Look first at the age of the roof and, if you know it, the approximate installation or last replacement date. From there, note the general condition, sealed, painted, and undamaged sheeting is lower risk than cracked, deteriorating, or previously damaged material. If you think it might be asbestos, NSW Government advice is clear: treat it like it is. Stop any work near it, keep the area clear, and get help from a licensed assessor rather than attempting to confirm it yourself.
Do Asbestos Roofs Have Markings?
Sometimes, though markings aren’t always present or visible on installed roofing. Where visible, manufacturer branding on the underside of sheets or on ridge capping can help narrow down the product and its likely era, but a lack of visible markings tells you nothing conclusive either way. Testing remains the only reliable method of confirmation.
Can Asbestos Be Found Under Roof Insulation?
Yes, and this is actually one of the higher-risk scenarios within a roof cavity. NSW Government guidance identifies insulation under roofs as an example of friable asbestos, meaning it can crumble and release fibres more easily than the bonded cement sheeting on the roof itself. Asbestos Removal Sydney teams treat loose-fill roof insulation with particular caution for exactly this reason, and it should never be disturbed without a licensed assessor’s advice, given how readily this type of material can release airborne fibres compared to solid roofing sheets.
Do Asbestos Eaves Need to Be Tested?
Yes, if there’s any reasonable likelihood they contain asbestos. Eaves are specifically listed by NSW Government guidance as a common location for asbestos-containing materials in older homes, and like roof sheeting, they’re generally non-friable and low risk if sealed and undisturbed. Before any work that could disturb them, such as painting preparation, drilling, or replacement, testing is the only way to confirm what you’re dealing with.
Do Old Gutters Contain Asbestos?
They can, though gutters are less consistently asbestos-containing than roof sheeting or eaves. Some older guttering systems, particularly asbestos cement box gutters built into a roofline, were manufactured using the same asbestos cement material as roof sheeting. Metal gutters, by contrast, are not an asbestos-containing product themselves, though the roofing and fascia they’re attached to may still be.
Do Asbestos Downpipes Still Exist?
Yes, in a considerable number of older properties. Asbestos cement was a common material for water and stormwater downpipes, and much of this infrastructure remains in place today, sometimes hidden along an exterior wall or running underground once it leaves the roofline. Any renovation, landscaping, or plumbing work touching these older downpipes should factor in the possibility of asbestos content, particularly on a property that hasn’t been substantially updated since before 1990.
Get Your Roof Properly Assessed
Roofing is one of the most common, and most exposed, locations for asbestos in older Australian homes, which makes getting it right particularly important before any repair, repaint, or replacement work begins. Our licensed team can inspect your roof, eaves, gutters, and downpipes, and provide clear, accurate results before any work goes ahead. Contact us today to book an inspection.
