There are several important reasons that cause car windshields to crack. Some of these reasons are:
1. Rocks, Pebbles, and road surface sand or Salt
Rocks, pebbles, and road surface sand that other car tires throw at or fall off the back of trucks are the most common cause of damage to windows, especially windshields. When these pebbles hit the glass, the glass becomes vulnerable to tiny cracks that may not be visible at all. Sometime later, the glass shatters with the slightest external factor.
2. Sudden changes in temperature
Sudden changes in the air temperature can put pressure on the glass and cause it to crack. The glass expands as it heats up and contracts as it cools down. Although car windows are designed to minimize temperature pressure, they can still be damaged in the event of a sudden change. If you live in a climate where the air may change abruptly, it may crack easily. For example, on a hot afternoon, you may be exposing your car to the sun, and shortly thereafter the car windows will shatter loudly. This is because the glass already has cracks. They may not even have been visible.
**Sometimes your own mistakes play a role. For example:
- You use boiling water to melt ice on glass in winter.
- On hot days, expose your car to direct sunlight. Extreme heat can also cause car windows to shatter, especially if they are already damaged.
- Sometimes it gets very hot inside the car and you suddenly turn on the air conditioner.
3. Improper installation of glass
Sometimes you have to change the windows (especially after accidents). If the glass is not installed properly, it will loosen over time. When the glass is loose, even the vibration of the car during normal driving can cause the glass to crack. If the glass itself has a poor quality structure, it will crack or break very quickly.
4. Slamming the Car door
Usually, the car windows are so strong that they will not shatter even if you slam the door. But sometimes it can cause invisible cracks. In this case, after closing the door firmly several times, the glass will be crushed at once. In this case, you probably think that the glass has been crushed spontaneously and there is no justification in your opinion. But in principle, cracked glass is the cause (although sometimes other reasons, such as incorrect installation or weak glass, can cause the glass to break suddenly).
5. Accidents
Sometimes the glass does not break in an accident, but the impact is so severe that it cracks. After a while, with the slightest stimulus, the glass may suddenly break.