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Windscreen Chip Repair guides

Plain-English advice to help you understand the problem and choose the right help.

• Windscreen chip: repair or replace?
  The 10 mm and 40 mm guide, why the driver's view matters, and when a chip is too close to the edge to repair.
• Will a windscreen chip fail the MOT?
  How the MOT test treats chips and cracks in zone A and the swept area, and how to avoid a failure.
• Why windscreen chips spread into cracks
  Temperature changes, road vibration and pressure: why small chips spread, and simple steps to protect the glass until it's repaired.
• New windscreen and ADAS calibration
  Why cars with lane assist and emergency braking may need camera calibration after a windscreen replacement.
• Windscreen repairs and insurance
  How glass cover works on UK car insurance, typical excess for repairs and replacements, and whether a claim affects your no-claims.