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When does a windscreen repair warrant a replacement?

A chip in your windscreen may seem minor, but it can quickly become a safety hazard. This article explains when a repair is sufficient and when a full replacement is necessary, helping drivers make informed decisions and avoid costly delays.
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Published on
October 17, 2025
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Your car’s windscreen does more than shield you from the elements, it is an important safety feature.

A strong, clear windscreen supports your vehicle’s structure, ensures optimal visibility, and works with airbags to protect you in a collision. That’s why even the smallest chip or crack should never be overlooked.

You may be wondering, when can a chip be repaired, and when does it require a full windscreen replacement? It is important to guide customers through this important decision, offering expert assessments and fast, reliable service nationwide.

The difference between windscreen repair and replacement

  • Repair focuses on preventing damage from spreading. Using advanced resin injection, a chip or small crack can often be sealed to restore strength and prevent further damage.
  • Replacement is required when the damage is too severe, compromising the safety and clarity of the glass. This means fitting a brand-new windscreen to meet manufacturer standards.

Knowing which option applies depends on the nature, size, and position of the damage.

When can a windscreen be repaired?

Not every chip warrants a replacement. In fact, many can be repaired quickly and affordably if certain conditions are met.  

Generally, a repair is possible if:

  1. The chip is smaller than a R5 coin
  1. Small, shallow chips can usually be repaired without compromising safety.
  1. Once the chip grows into a long crack, replacement becomes the only option.
  1. The crack is shorter than 10cm
  1. Short cracks that haven’t spread can often be sealed with resin.
  1. Longer cracks weaken the glass structure, necessitating a replacement.
  1. The damage is not in the driver’s line of vision
  1. Even after repair, a faint mark may remain. If the chip obstructs vision, it could pose a safety risk and fail a roadworthy test.
  1. The chip is away from the edges of the windscreen
  1. Chips close to the frame put stress on the glass and are more likely to spread. In this case, replacement is often recommended.

Skilled technicians can carefully assess each case to ensure that repairs meet both safety and legal standards. If a repair is suitable, it’s a quick, cost-effective solution that gets you back on the road in no time.

Fast & Convenient Automotive Chip Repairs, At your Place, Not Ours

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“At the end of the day, a windscreen is a safety device, not just a piece of glass.”

My Glass

When does a windscreen need to be replaced?

A replacement is required when:

  • The crack is longer than 10cm
  • The chip has penetrated both layers of laminated glass
  • Multiple chips or cracks are present
  • Damage obstructs the driver’s line of vision
  • The chip sits at the windscreen’s edge

Driving with a severely damaged windscreen is not just inconvenient, it’s dangerous. The windscreen contributes up to 30% of a vehicle’s structural strength. If it fails during a collision, airbags may not deploy correctly, and the roof could collapse in a rollover.

For this reason, My Glass prioritises safety first. If your windscreen doesn’t meet the repair criteria, our team will guide you through the replacement process, ensuring the correct fit and premium-quality glass every time.

Why quick action matters - A small chip today can become a long crack tomorrow. Everyday factors such as temperature changes, vibrations from driving, or even moisture can cause damage to spread rapidly. What could have been a simple repair may end up requiring a costly replacement.

That’s why we recommend contacting a reputable chip repairer as soon as you notice a chip, to assess the damage, and complete the repair or replacement.

How My Glass can help - At My Glass, our goal is to make windscreen care fast, convenient, and hassle-free. Here’s how we support you at every step:

  • Expert assessments: Unsure whether you need a repair or replacement? Our technicians will give you honest, professional advice based on safety standards.
  • On-site service: With over 200 mobile units across South Africa, we come to your location, saving you time and hassle.
  • Quality workmanship: We use only premium materials and follow manufacturer guidelines to ensure your windscreen is restored to its original strength.
  • B2B and B2C service: Whether you’re managing a fleet of vehicles or caring for your personal car, My Glass has you covered.
  • Customer care: Our team handles everything from start to finish, keeping you informed throughout the process.

Key takeaways to share with your clients:

  • Repair if the chip is small, not in your line of vision, and away from the windscreen edges.
  • Replace if the crack is large, deep, obstructive, or at risk of spreading.
  • Act quickly – Delaying action could turn a simple fix into a major replacement.

At the end of the day, a windscreen is a safety device, not just a piece of glass.

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