Which Windscreen Cracks Can Be Repaired (And Which Can’t)

If you’re staring at a crack or chip on your windscreen, you’re probably asking yourself one thing: can this be repaired, or do I need a full replacement? This is one of the most common questions we get from local drivers, and the answer depends on a few specific details. At JD Windscreens, we repair windscreens every day across Shepparton and surrounding towns. From small stone chips to more complex star cracks, we know exactly what’s safe to fix and what isn’t. This article will guide you through exactly what can be repaired, what can’t, and why getting the right advice early can save you time, money, and stress.



If you’re unsure whether that crack in your windscreen can be repaired, there are a few key things we check first before making that call. It’s not about guesswork; rather, we use specific criteria to determine whether a repair is safe and effective. Below are the main points we consider:

• Size of the damage: Most small chips under 25mm and cracks under 75mm are repairable.
• Position on the glass: If the damage is outside the driver’s direct line of sight, it may be eligible for repair.
• Type of damage: Some cracks, like bullseye or star breaks, are often fixable. Others, like edge cracks, usually aren’t.
• Depth of damage: If the crack affects only the outer layer of the windscreen (laminated glass), it may be safely repaired.

For most people, the decision between repair and replacement also comes down to practical concerns like time and cost, especially when the damage appears borderline. That’s why understanding the key differences between windshield repair and full replacement can help you make a more informed choice.

Many of the windscreen repairs we carry out fall into a few common categories. If your damage looks anything like these, there’s a good chance we can fix it quickly and safely:

• Stone Chip: Caused by loose gravel or road debris. These are very common and often fixable if the chip is smaller than a 20-cent coin and not in the driver’s line of sight.
• Bullseye Crack: A clean, round impact that doesn’t extend too far. These can usually be repaired if they fall within size limits.
• Star Break: Chips with small cracks extending outward. Repair is possible if the cracks are contained and not too deep.
• Half-Moon Crack: Similar to bullseye but with a partial circle. These are commonly repaired when caught early.
• Combination Break: A mix of bullseye and star break characteristics. Repair depends on size and location but is often achievable.

Certain types of windscreen damage simply cannot be repaired, no matter how small they may look. Attempting to fix them would compromise safety and visibility. Below are the most common types of damage that usually require a full replacement:

• Long Cracks: Cracks over 75mm (roughly the length of a credit card) generally compromise the strength of the windscreen.
• Edge Cracks: Cracks at the outer edges of the windscreen often spread quickly. This area plays a critical role in supporting the glass.
• Multiple Impact Points: When there are several chips or cracks close together, repair won’t restore the glass to a safe standard.
• Direct Line of Sight: Even the best repair may leave a small blemish. If it’s in your field of view, it could affect visibility and road safety.
• Deep Layer Cracks: If the crack goes through both layers of laminated glass, no repair method can restore its strength.

It only takes one unexpected bump or pothole to turn a minor chip into a crack that can no longer be repaired. Small damage can spread quickly, especially when it’s exposed to changing temperatures, moisture, or road vibrations. In just a few days, what could have been a simple fix can become a full replacement job. We often get calls from customers who waited over the weekend only to find their chip had worsened by Monday. 

So, acting early is key here. In many cases, getting the damage addressed through a fast mobile windscreen repair is enough to prevent costly outcomes and keep you safely on the road. That’s why we offer same-day mobile windscreen repair throughout Melbourne, Sydney, Brisbane, Gold Coast, and nearby areas. Our team can assess the damage on-site and let you know right away if it can be repaired.

If you’ve noticed a chip or crack, getting it assessed early makes all the difference. We offer professional windscreen repair using high-quality resin that restores both strength and clarity. If the damage isn’t safe to repair, we’ll arrange a replacement often the same day and help with insurance paperwork, too. To get started, simply contact our team. We’ll assess the damage and let you know the safest and most cost-effective option for your vehicle. With mobile service and expert advice, JD Windscreens makes it easy to get back on the road with confidence.

Can all windscreen cracks be repaired?
No, only specific types of damage like small chips, bullseye cracks, or short star breaks can usually be repaired. Cracks that are too long, deep, or near the edges typically require a full windscreen replacement for safety reasons.

How do I know if my windscreen needs replacement instead of repair?
If the damage is longer than 75mm, sits near the windscreen's edge, affects your line of sight, or involves multiple impact points, it’s generally not repairable and a full replacement is the safer option.

Is it safe to drive with a small crack in the windscreen?
Driving with even a small crack can be risky, as temperature changes, vibrations, or road bumps can cause it to spread quickly. Repairing it early helps prevent more serious damage and potential safety hazards.

How quickly should I get a chip or crack repaired?
You should get it looked at as soon as possible. Minor damage can worsen rapidly, and acting early may save you from a full windscreen replacement and added costs.