The short version for Brisbane homeowners
If you suspect your roof contains asbestos, the safest first step is to do nothing to it. Do not climb on it, drill it, water-blast it or scrub it ahead of painting. Asbestos cement sheeting is reasonably stable while it is intact, but cutting, breaking or abrading it can release fibres that are dangerous to breathe. In Queensland, removal is regulated by Workplace Health and Safety Queensland (WHSQ), and anything beyond a small area must be removed by a licensed asbestos removalist. Check the current rules directly with WHSQ, because the details can change.
The good news is that a properly planned replacement is routine work. The sheets come off under controlled conditions, the site is cleaned and cleared, and a new roof, usually Colorbond steel, goes on over sound battens.
Which Brisbane roofs are likely to contain asbestos
Asbestos cement was a popular building product in Australia for decades, and Brisbane has plenty of houses from that era. Homes built or re-roofed before about 1990 are the ones to treat with caution. Common examples include:
- Post-war timber houses on stumps with grey corrugated fibro roofing
- 1960s and 1970s lowset homes with fibre cement sheeting on the roof, eaves or a rear skillion
- Older carports, patios, sleep-outs and laundry extensions that were added cheaply at the time
- Queenslanders where a later extension used fibro instead of matching the original iron
Age alone does not prove anything. Many fibre cement products made later contain no asbestos, and some older roofs were replaced long ago. The only way to know is to have a sample assessed by a competent person and tested by an accredited laboratory. Do not snap off a piece yourself to check.
Things not to do
The biggest risks usually come from well-meant maintenance rather than the roof itself. Before any work happens, avoid the following:
- Water-blasting. High-pressure cleaning of asbestos cement roofs is restricted in Queensland because it strips the surface and spreads contaminated slurry across gardens, gutters and neighbouring yards.
- Paint preparation. Sanding, wire-brushing or scraping weathered sheets before painting can release fibres.
- Walking on the roof. Old fibro sheets can be brittle, so falls through the roof are a real hazard as well as damage to the sheets.
- Drilling or cutting. That includes fitting a whirlybird, an antenna bracket or solar mounts to the existing sheets.
- Clearing gutters by hand without precautions. Gutters under a weathered asbestos roof can collect debris from the sheet surface.
If your roof has been damaged in a summer hailstorm and pieces have fallen into the yard, keep people and pets away, leave the debris where it is and get advice before cleaning up.
How removal and replacement usually works
A replacement on an asbestos roof has two distinct parts, and they are often handled by different licensed people working to one schedule.
| Stage | What happens | Who is involved |
|---|---|---|
| Assessment | Sample tested, roof inspected, scope agreed | Assessor or removalist, roofing contractor |
| Notification and planning | Removal planned under current WHSQ requirements | Licensed asbestos removalist |
| Removal | Sheets wetted, unfixed without breaking, wrapped and loaded | Licensed asbestos removalist |
| Clearance | Area inspected and cleared before other trades continue | Independent assessor where required |
| New roof | Battens checked, sarking and new sheeting installed | Licensed roofing contractor |
Removal crews typically keep the sheets as whole as possible, dampen them to suppress dust, and wrap them in heavy plastic before they leave the site. Waste must go to a facility licensed to accept asbestos. It cannot go in a skip bin with general demolition rubbish or out with household waste.
Once the sheets are off, the house is open to the weather. In Brisbane's storm season that matters, so a good plan sequences removal and new sheeting closely and allows for temporary protection if an afternoon storm rolls in. You can read more about sequencing in our guide to what to expect during a roof replacement project.
Clearance before the new roof goes on
Clearance is the step owners sometimes overlook. Depending on the scope of the work and current requirements, an independent assessor may need to inspect the area and confirm it is safe before other work proceeds. Ask the removalist what clearance applies to your job and make sure you receive the paperwork. Keep it with your house records. It is useful if you later sell, renovate or make an insurance claim.
Ceiling spaces deserve attention too. Older homes can have fibre debris in the roof cavity from years of weathering, so it is worth asking whether the roof space needs assessment while the sheets are off and access is easy.
Neighbours, children and pets
Removal is visible work. Crews in disposable suits and masks, plastic-wrapped stacks and warning signage can worry the people next door. A brief heads-up a few days beforehand goes a long way. Let neighbours know the dates, that licensed people are doing the work under Queensland rules, and that closing windows on the day is a sensible precaution. Keep children and pets indoors or away from the property while removal is underway.
Choosing what goes on next
Most Brisbane owners replace asbestos cement with Colorbond or Zincalume steel. Steel is light, which suits older timber frames and houses on stumps, and it handles heavy subtropical downpours well when it is installed with the right fall and flashings. Compare options in our guide to the best roofing materials for the Brisbane climate, and see how a metal roof replacement is usually scoped.
Because the roof is fully stripped, it is also a good moment to upgrade battens and tie-downs, add sarking and insulation, and fix ventilation. If any of that changes the structure, a building certifier can confirm whether approval is needed. Our guide to roof replacement regulations and permits in Brisbane covers that side.
Cost and next steps
Asbestos removal adds a separate line to the job, and the overall price depends on roof size, access, pitch, the number of storeys and disposal. For a breakdown of what drives the total, see how much a roof replacement costs in Brisbane.
When you request quotes, we arrange for the contractors we work with to inspect the roof and explain how removal and replacement would be coordinated. We ask the contractors we work with to hold the licences and insurance the job needs, so ask to see them before work starts, including the removalist's asbestos licence.
General information for Brisbane homeowners, written for planning, not a substitute for someone inspecting your roof. Rules and products change; confirm details with Brisbane City Council, the QBCC or the agency named before acting.