What happens when you ignore a windscreen chip

A windscreen chip stays small only if you repair it within the first few days. Once a chip sits for a week or longer, temperature changes and road vibration cause it to spread into a crack that runs across the glass. At that point, the windscreen must be replaced entirely — a much larger expense than a repair would have been.

The chip itself does not make the windscreen unsafe to drive on when ready. What matters is whether it blocks your line of sight or whether it has already started to crack. A chip smaller than a coin, away from your direct view of the road, can usually wait a day or two while you arrange a repair. A chip larger than a coin, or one that has already cracked outward, needs attention within hours.

Key Takeaways

  • Windscreen chips can be repaired by a glass specialist if caught within the first few days, before cracks form.
  • The repair process involves injecting resin into the chip, which hardens and bonds the glass back together.
  • Most repairs take 30 minutes to an hour and cost between £50 and £150, depending on the chip size and location.
  • If the chip has already cracked or spreads across your line of sight, the windscreen must be replaced instead of repaired.
  • Your car insurance may cover the repair cost under glass cover, often with no excess or a small fixed excess.

When a chip can still be repaired

A glass specialist can repair a chip if it meets three conditions: the damage is smaller than a 10p coin, no crack has formed yet, and the chip is not directly in your line of sight (the area you see when looking straight ahead at the road). If all three are true, the repair process takes about 30 minutes and the glass will be as strong as it was before.

If the chip is larger than a 10p coin, or if you can see a line spreading from it, the glass specialist will tell you the windscreen cannot be repaired and must be replaced. This is not a judgment call — it is a safety standard. A repaired crack will not hold under the stress of driving, and it will fail suddenly.

How windscreen chip repair works

The glass specialist cleans the chip thoroughly to remove any dirt or loose glass. They then inject a special resin into the damage using a syringe or pressure applicator. The resin flows into the tiny spaces within the chip and hardens, bonding the glass back together. Once it has set, they polish the area smooth and check that your view through the windscreen is clear.

The whole process is non-invasive — the specialist does not remove the windscreen or drill into it. You can drive the car when ready after the repair, though some specialists recommend waiting an hour before driving to let the resin fully cure. The repair is permanent; the chip will not reopen.

Finding a glass specialist and booking a repair

Most towns have at least one dedicated windscreen repair business. Search online for "windscreen repair near me" or ask your car insurance provider for a recommendation — many insurers have preferred suppliers they send customers to. You can also contact your car manufacturer's dealership, though they usually charge more than independent specialists.

Call ahead to describe the chip size and location. The specialist will tell you whether it can be repaired or whether the windscreen must be replaced. If it can be repaired, they will give you a price and ask when you can bring the car in. Most repairs can be done the same day or the next morning. Some specialists offer mobile repair, where they come to your home or workplace instead of you driving to them.

What to expect from the cost

A windscreen chip repair typically costs between £50 and £150. The exact price depends on the chip size, how deep it goes into the glass, and where it is located. A chip near the edge of the windscreen costs more to repair than one in the middle, because the specialist has to work more carefully to avoid damaging the seal.

If your car insurance includes glass cover, the repair may be covered in full or you may pay a small excess (often £0 to £50). Check your policy documents or call your insurer before booking the repair. If you claim on glass cover, it usually does not affect your no-claims discount, and some insurers do not count it as a claim at all. If you do not have glass cover, you pay the full cost yourself.

What to do if the chip has already cracked

If a line has spread from the chip, or if the chip is larger than a 10p coin, the windscreen cannot be repaired. It must be replaced. A replacement is more expensive — typically £200 to £500 depending on your car model — and takes longer, usually one to two hours. The old windscreen is removed, the frame is cleaned, and a new windscreen is fitted and sealed.

If your insurance includes glass cover, a replacement is usually covered the same way as a repair. If you do not have glass cover and cannot afford a replacement, you can still drive the car as long as the crack does not obstruct your view and the windscreen is not in danger of failing. However, you are breaking the law if the damage is in your line of sight, and you risk a fine. The longer you wait, the more likely the crack will spread and the windscreen will fail suddenly.

Preventing chips from spreading while you wait for repair

If you cannot get a repair appointment when ready, take steps to stop the chip from spreading. Avoid driving on bumpy roads or at high speed, because vibration makes cracks grow. Park in shade rather than direct sun, because heat causes the glass to expand and puts pressure on the chip. If the weather is very cold, avoid sudden temperature changes — do not pour hot water on a cold windscreen.

You can buy a temporary chip repair kit from a car parts shop for £5 to £15. These kits contain resin and a syringe, and they work on the same principle as a professional repair. They are not as strong as a professional job, but they can slow the spread of a crack for a few days. Follow the kit instructions carefully — most require you to clean the chip, inject the resin, and leave it to cure for several hours before driving.

Frequently Asked Questions

Will a repaired chip be visible after repair?

Yes, you will usually be able to see where the chip was, but it will be much less noticeable than the original damage. The resin fills the space and bonds the glass, but it may not be perfectly clear. From inside the car, the repair is usually invisible. From outside, you may see a slight discoloration or texture change if you look closely.

Can I repair a chip myself with a DIY kit?

A DIY kit can slow the spread of a chip, but it will not produce the same result as a professional repair. Professional specialists have better resin, better tools, and experience judging whether a chip can be safely repaired. If the chip is small and you cannot get to a specialist quickly, a DIY kit is better than nothing. If the chip is large or has already cracked, a DIY kit will not work.

What if I have a chip but no insurance?

You can still get the chip repaired by paying out of pocket. Contact a local windscreen specialist and ask for a quote. If the cost is too high, you can delay the repair for a few days if the chip is small and not spreading. However, the longer you wait, the more likely it will crack, and then you will have to replace the entire windscreen instead.

Does a windscreen repair affect my car's resale value?

A professional repair has no effect on resale value. The windscreen is as strong as it was before, and the repair is barely visible. A crack or large chip that has not been repaired will lower the value, because a buyer will have to pay for a replacement themselves.

Can a chip be repaired if it is in the corner of the windscreen?

Chips in the corners or very close to the edge are harder to repair safely, because the specialist has to work near the seal that holds the windscreen in place. Some specialists will refuse to repair a corner chip. Others will repair it but charge more. Call a specialist and describe the location — they will tell you whether it can be done.