How the figures on this site are checked
Every price, discount and rule links to where it came from and shows the date we last looked at it.
In brief
We don't make up or estimate figures. Discounts and building rules come from the government or scheme page that sets them. Prices come from named window companies, because no official body publishes window prices, and they're labelled as industry figures wherever they appear.
Which sources do we use?
| Topic | Source | Labelled as |
|---|---|---|
| Victorian discounts | Victorian Energy Upgrades on energy.vic.gov.au | Official |
| Building code rules | Australian Building Codes Board (NCC), NatHERS, YourHome | Official |
| Victorian building and rental law | Consumer Affairs Victoria, the Building and Plumbing Commission, vic.gov.au | Official |
| Window energy labels | Window Energy Rating Scheme (run by the Australian Glass and Window Association) | Scheme source |
| Prices and U-values | One named window company in Melbourne and one in Perth | Industry, installer-reported |
Why name the companies behind the prices?
Every price source on this site makes or sells windows. That doesn't make their figures wrong, but it matters when a uPVC maker compares uPVC with aluminium, or when a replacement seller describes secondary glazing. Naming them lets you weigh that yourself.
How do we keep figures current?
Each figure carries an expiry date, set shorter where a rule is known to be changing. Before every update we run a check that lists anything past that date and tests every source link, and we look at the source again before a figure stays on the site.
What happens when we get something wrong?
We fix it and say so on the page, with the date. In September 2026, for example, we found that our secondary glazing article had used a replacement window price as a secondary glazing price. The article now carries a correction note explaining what changed.
What do we leave out?
If we can't find a figure on the official page, or on a named source we can link to, it isn't on the site. That includes installed secondary glazing prices, prices for cities we have no source for, and headline discount totals we couldn't confirm.
What this site is not
We are not a government agency and are not affiliated with Victorian Energy Upgrades, the Australian Building Codes Board, NatHERS or WERS. Nothing here is building, legal or financial advice. Eligibility for any discount is decided by the program, and compliance questions belong with a registered building surveyor.
How is the site paid for?
Three ways, once they start. Glazing businesses can pay us for a managed website plan. When quote requests open, businesses we pass a request to may pay us for that introduction. This site may also show advertising. None of these changes the figures we publish, a business paying us doesn't move it up or into a guide, and ads never decide what a page says.
Who runs it?
The business behind this site will be named here, with its ABN and a contact address, before the site opens to the public.