Got a cracked or chipped car window? This guide explains when a repair is enough, when a full replacement is needed, and what to look for in a glass shop.
Repair or replace a windshield?
The decision mainly depends on the size and location of the damage:
- Repair is usually possible when the crack is smaller than a coin (up to 2–3 cm) and isn’t in the driver’s direct line of sight or at the edge of the glass
- Replacement is needed when the crack is larger, spreading, runs through multiple layers of glass, or sits in the sensor area used by ADAS cameras
Acting quickly matters — a small crack can spread rapidly due to temperature changes and road vibration, turning a cheap repair into a full replacement.
What does a windshield replacement include?
- Removal of the damaged glass and preparation of the frame
- Installation of the new glass with proper adhesive and seals
- ADAS recalibration — required on modern vehicles with a driver-assistance camera mounted on the windshield
- Seal check to prevent water leaks and wind noise
Does insurance cover glass repair or replacement?
Many comprehensive (fully comp / kasko-style) car insurance policies cover windshield repair or replacement, often without affecting your no-claims bonus if it’s handled as a separate glass claim. It’s worth checking your specific policy terms before booking a shop.
How to choose a reliable auto glass shop
- Check whether they use quality glass (OEM or equivalent standard)
- Ask whether ADAS recalibration is included, if your car has driver-assistance features
- Check turnaround time — replacement usually takes 1–2 hours, plus curing time for the adhesive
- Check if they work directly with your insurer for simpler claims handling
On Kardet you can submit a free request and receive quotes from verified auto glass shops near you.
Frequently asked questions about car glass
Can I drive with a cracked windshield?
Short-term, yes, if the crack isn’t in the driver’s sightline, but it’s risky and can fail a roadworthiness inspection. It’s best to get it repaired as soon as possible.
How long does the adhesive need to cure after a glass replacement?
Depending on the adhesive used, the car is typically safe to drive after 1–2 hours, with full strength reached after about 24 hours — high-pressure washing should be avoided during that window.
Is extra calibration needed after a windshield replacement?
On vehicles with driver-assistance systems (automatic braking, lane keeping), the camera typically needs to be recalibrated after replacement, otherwise those systems won’t function correctly.