Is a cracked windscreen legal in Queensland?
Not automatically — but it becomes a defect the moment the damage sits in the driver’s critical viewing area, a crack passes about 150 mm, or a chip is larger than about 16 mm.
Any of those three will fail a Queensland safety certificate inspection, and police can defect a vehicle on the road for them. This page explains what an inspector is actually measuring, and the two reasons damaged glass matters that have nothing to do with a fine.
What actually makes it a defect
Three separate tests. Failing any one of them is enough on its own.
Position — the driver’s critical viewing area
The zone the driver looks through, roughly the width swept by the wipers directly ahead of the driver’s seat. Damage in there is treated far more strictly than damage anywhere else on the screen, and even small chips can fail. This is also why we will not resin-repair damage in that zone — the repair itself would fail.
Crack length — about 150 mm
A crack longer than roughly 150 mm is a defect wherever it sits on the glass. Cracks do not stay the length they are, which is the practical problem: a 120 mm crack that passes today fails in a fortnight.
Chip size — about 16 mm
A chip larger than roughly 16 mm across is a defect. A 20-cent coin is 28 mm, so a chip that a coin comfortably covers with room to spare is generally under the limit.
Edge damage
Damage at the bonded perimeter of the glass gets treated seriously regardless of how big it is, because that is the structural join between the windscreen and the body.
The limits are minimums, not targets.
A screen that scrapes through an inspection today is a screen with damage still travelling through it. Nothing about passing makes the crack stop.
What the inspector looks at
A safety certificate inspection covers more of the glass than most people expect.
The windscreen itself
Cracks, chips, scoring, delamination and any previous repair that has clouded. Position matters as much as size.
Wiper sweep and blades
The wipers have to clear the critical viewing area properly. Perished blades and a wiper that misses part of the sweep are both defects, and both get noticed while the glass is being checked.
Window tint
Aftermarket film on the windscreen is restricted, and a tint band across the top has limits on how far down it can come. Worth knowing if you are buying a car with tinted glass.
Side and rear glass
Has to be automotive safety glass with the correct markings, and door glass has to wind properly. Broken-in vehicles sometimes get a temporary plastic fix that will not pass.
Stickers and mounted devices
Anything obstructing the driver’s view — including a badly placed dash camera or phone mount — can be marked up.
When you actually need a certificate
You do not need one continuously — you need one at specific moments, and that is usually when the glass becomes urgent.
Selling a registered vehicle
A safety certificate is required before a private sale of a registered light vehicle in Queensland. Cracked glass is one of the more common reasons a car comes back from inspection with work to do.
Re-registering or transferring
Bringing an unregistered vehicle back onto the road, or registering an interstate vehicle in Queensland, brings an inspection with it.
After a defect notice
If a vehicle is defected on the road, it has to be repaired and cleared. A same-day mobile windscreen replacement is usually the fastest route through that.
Any day of the week, on the road
You do not need to be at an inspection for damaged glass to be a problem. Police can issue a defect notice at a roadside stop.
Two reasons that have nothing to do with the law
The regulation exists because of these, not the other way round.
The windscreen is structural. It is bonded to the body and contributes meaningfully to the rigidity of the passenger cell — including how the roof behaves in a rollover. A cracked screen and a compromised bond do not carry load the way an intact one does.
It is the backstop for the passenger airbag. On most cars the passenger airbag deploys upward and inflates off the inside face of the windscreen before it reaches the occupant. If the glass fails under that load, the airbag does not end up where it was designed to be.
Neither of those shows up in a fine, and neither is theoretical. It is the reason we treat bead height and pinchweld preparation as the part of a replacement that matters most, rather than the part nobody sees. If you want the detail of how a screen is fitted, it is on the repair or replacement page.
General guidance, not legal advice
Read this as an experienced fitter’s account of what inspectors measure.
The figures above are the working limits we see applied to vehicle glass in Queensland and the ones we quote to customers every week. Requirements are set by the Department of Transport and Main Roads and can be updated, and an approved inspection station applies them to the specific vehicle in front of them.
If you need the authoritative wording for a particular situation — a dispute over a defect notice, an unusual vehicle, a heavy vehicle — check with Transport and Main Roads or the inspection station directly. For the ordinary question of will this crack pass?, send us a photo and we will tell you what we think an inspector will say.
Keep reading
Can I get fined for a cracked windscreen in Queensland?
Yes. Police can issue a defect notice for a windscreen where damage sits in the driver’s critical viewing area, a crack is longer than about 150 mm or a chip is larger than about 16 mm. The vehicle then has to be repaired and the notice cleared.
Will a cracked windscreen fail a roadworthy in Queensland?
It will if the damage is in the driver’s critical viewing area, if a crack exceeds about 150 mm, if a chip exceeds about 16 mm, or if there is damage at the bonded edge of the glass. Damage outside the driver’s viewing area and under those sizes generally passes.
How long is a Queensland safety certificate valid?
For a private seller it is valid for two months or 2,000 kilometres, whichever comes first. That is worth knowing before you book glass work — if the certificate is about to lapse, get the windscreen done first.
Can I drive a car with a cracked windscreen to get it fixed?
You do not need to. We are fully mobile and fit windscreens at your home, workplace or the roadside anywhere in Brisbane, Ipswich, Logan and Bayside, so a car with badly cracked glass does not have to be driven anywhere.
Does a repaired chip fail a roadworthy?
A properly injected repair outside the driver’s critical viewing area does not fail an inspection. A repair inside that area can, because the cured resin leaves faint optical distortion exactly where clarity is required — which is why we replace rather than repair in that zone.
Failed a roadworthy on the glass?
We fit windscreens at your address, usually the same day, so the car can be re-inspected without another trip anywhere. Call and tell us what the inspector wrote down.