Most people know that a small crack in a windshield can quickly spread to become a large crack. But have you ever wondered why this happens?
A windshield is designed to withstand the elements, but a weakened windshield is more susceptible to damage. When the glass contracts or expands due to wind, rain, and temperature changes, the damaged portion also contracts and expands, and the abrasive action leads to more damage. To further complicate matters, dirt and dust can become lodged in the crack -- but don't try to clean it. Just cover the crack with clear packing tape and park your car in a garage or covered area, if possible, until you are able to schedule professional services.
Things that normally have no effect on an undamaged windshield, such as driving over speed bumps or potholes, shutting your car door with a bit too much gusto, hitting your brakes too hard, or getting into a very minor fender bender, will have a negative impact on a compromised windshield. Using care may slow the spread of the crack, but the sooner your windshield is repaired or replaced, the sooner you can get back to normal.
For your safety, we highly recommend you have us look at your windshield right away to determine whether the crack can be repaired or if the windshield will need to be replaced.