How the numbers on this site are made
Every figure links to where it came from, says whether the source is official, and shows the date we last checked it.
The site currently runs on 78 sourced figures, 40 of them from government or regulator pages. We do not estimate, average or round numbers into existence. Where no source we can name publishes a figure, the page leaves it out.
Official and industry figures are not the same thing
Rules come from the body that writes them, or from the legislation itself: SafeWork NSW and the NSW Government asbestos site, Queensland's Public Health Regulation and Business Queensland, the Victorian asbestos site, the NSW planning department, the QBCC, Consumer Affairs Victoria and the Australian Building Codes Board. Those are marked official.
Prices are different. No Australian government body publishes what a roof costs, so every price here comes from a named industry guide or installer, and is labelled that way in the source list and in the calculator. A price from one Melbourne roofer is a data point, not a national average, and we write about it that way. Manufacturer statements, such as BlueScope's guidance on coastal steel, are labelled industry too.
What happens when sources disagree
We print both. The clearest example is removing an old roof, where the two published ranges do not even overlap. The guides show the gap and tell you to have removal quoted as its own line. Where an official page contradicts a widely repeated claim, the official page wins.
How the figures stay current
Every figure carries a checked date and an expiry date. A script lists anything expired or close to it, and those figures get re-verified at the source before the next deploy. Prices are checked more often than rules, because they move faster.
What this site is not
We are not a government agency, a regulator or a roofing business, and we are not affiliated with any of the organisations whose pages we cite. Nothing here is legal, building or financial advice. Licensing, approval and asbestos rules are decided by the relevant authority, not by us.
How the site is paid for
Roofing businesses can pay us a monthly fee for a website plan, which includes a listing beside our guides for their service area. When quote requests open, we will pass a request only to roofing businesses that say they cover the postcode, and those businesses may pay us a fee for the introduction. It doesn't change what you pay. This site may also show advertising. None of this changes our figures or which sources we use, and no business can pay to have a price or a rule changed.
Corrections
If a figure here is out of date or wrong, tell us through the contact page and we will check it against the source. Corrections that hold up are made and re-dated on the page.
Operator details are published here before this site launches.