Windscreen damage is easier to name than to judge. A bullseye, star break and hairline crack can all begin with one stone strike, but they don’t behave the same way.
A repair stabilises suitable damage and may improve appearance; it does not promise an invisible mark. The better first question is: where is it, how deep is it, and is it spreading?
At Competitive Windscreens, we help Sydney drivers with windscreen repair, windscreen replacement, chip repair, car glass work, truck glass and windscreen calibration. Before quoting, we ask for practical vehicle details such as make, model, year, glass type and relevant accessories so we can better understand the work required. If you’re unsure what the damage means, request a windscreen quote and we’ll help you work through it.
Start with the pattern, then check the position
A bullseye usually looks like a round mark with a darker centre and a small pit at the impact point. A star break has fine legs radiating away from the strike. A hairline crack is a thin line that may start at the impact point, run towards the edge, or appear after heat, cold or road vibration. Combination damage blends patterns.
The name gives a technician a starting point. The position often matters more. Damage near the edge can put more stress into the glass. Damage in the driver’s swept view can leave glare or distortion even after a neat repair. Dirt or moisture can also limit how cleanly resin bonds.
Quick guide to common windscreen damage types
| Damage type | What you may see | Why it matters |
| Bullseye | Round target-like mark with a central impact point | Often more contained, but depth, dirt and position still matter |
| Star break | Fine cracks spreading from one point | Legs can travel under heat, vibration or pressure |
| Hairline crack | A thin line, short or long | Edge contact, spread and driver view can push the job towards replacement |
| Combination break | Mixed bullseye, star and crack features | More variables, so photo-only judgement is less reliable |
Repair depends on more than the damage name
A bullseye windscreen chip is often the damage drivers hope can be repaired, and sometimes that is reasonable. Suitable windscreen chip repair Sydney work usually depends on the mark being contained in the outer layer, reasonably clean, away from the edge and not sitting where a remaining dull spot could distract the driver.
Star break windscreen damage is less predictable because each leg can carry movement. A short star in a suitable area may be repairable, but longer legs, several impact points or edge cracks can change the assessment. A hairline windscreen crack can look harmless because it is narrow. Length, direction and movement matter more.
If you are comparing windscreen repair Sydney and windscreen replacement Sydney options, describe the pattern, measure the visible length and mention whether it has changed. Repair may reduce the visual mark, but a slight blemish can remain.
Your vehicle details can change the work required
Generic size rules can help you judge urgency, but they don’t replace inspection. A technician will check depth, crater size, moisture, dirt, laminate separation, previous repairs and the exact viewing area. Rain, dust, heat and poor access can affect repair conditions.
Make, model, year, glass type, rain sensors, lane or merging sensors, heated glass, aerials and camera housings can change the quote. This is why we ask for those details before giving advice on the next step.
ADAS can turn glass damage into a calibration question
ADAS means Advanced Driver Assistance Systems. Many newer vehicles have cameras or sensors around the windscreen for lane assist, emergency braking, traffic sign recognition or adaptive cruise control. If the windscreen needs replacement, those systems may need calibration depending on the vehicle and manufacturer procedure. Industry ADAS calibration guidance separates static calibration from dynamic calibration drives, and the method can affect where and how the job is done.
A quote that ignores windscreen calibration Sydney questions may miss part of the work. If your vehicle has a camera behind the glass, tell us early so we can review the details before you commit.
Frequently Asked Questions
Can a bullseye chip always be repaired?
No. Many bullseye chips are good repair candidates, but depth, size, position, contamination and driver visibility all matter. A technician needs to see the damage first.
Will a repaired chip disappear?
Not always. A repair may improve the appearance and stabilise suitable damage, but a small blemish or faint outline can remain.
Should I mention insurance when asking for a quote?
Yes, if you plan to use it. Glass cover, excess rules and calibration cover vary by policy, so check your insurer’s wording and tell us how you want the quote prepared.
Naming the damage is a useful first step. Deciding what to do next takes a closer look at the glass, the vehicle and the equipment fitted around the windscreen. Request a quote from Competitive Windscreens with your vehicle details and the type of damage, and we’ll help you decide whether repair, replacement or calibration should be considered.