Why Would a Windshield Break from the Inside?


A crack in your windshield is not only an inconvenience, but also a safety concern. When a windshield cracks from the inside, it can be a puzzling situation. In this article, we’ll discuss why this may occur and what you can do to reduce the risk of it happening to you.

Temperature Fluctuations

One common cause of windshields cracking from the inside is extreme temperature changes. If your car is exposed to direct sunlight on a hot day and then suddenly subjected to a blast of cold air, the rapid expansion and contraction can lead to stress on the glass. Over time, this stress weakens the glass and can result in a crack.

Manufacturing Defects

Another reason for internal windshield cracks is manufacturing defects. Small imperfections in the glass or uneven stress distribution can make the glass more susceptible to cracking under normal driving conditions. These defects might not be immediately visible but can manifest as cracks over time due to the repeated stresses endured while driving.

Impact Forces

Even though the crack appears on the inside, external impact forces can cause it. A significant impact, such as a rock hitting the windshield, can create enough force to produce a crack from the outside to the inside. The internal crack might not be visible immediately, but it can gradually spread due to ongoing vibrations and driving conditions.

Previous Damage

If your windshield has suffered a prior impact or has undergone repairs, the structural integrity might have been compromised.  Over time, the weakened areas can lead to cracks originating from the inside, especially when the vehicle encounters road vibrations or changes in pressure.


To avoid windshield cracking from the inside, follow these steps:

  • Park your car in shaded areas on hot days.
  • Regularly inspect your windshield for small chips or cracks and have them repaired immediately.
  • Drive at a safe distance from other vehicles to minimize the impacts from road debris.
  • If you notice any unusual noises or vibrations while driving, have your windshield checked by a professional.


A cracked windshield from the inside can be caused by temperature fluctuations, manufacturing defects, impact forces, or previous damage. Regular maintenance, cautious driving, and prompt repairs are essential to prevent such cracks and ensure your safety on the road.

Who to Call

If you need to have your vehicle’s windshield repaired, you can reach out to the professionals here at USA Auto Glass Florida. We are a locally owned and operated company serving South Florida from South Miami Heights to Ft. Lauderdale, West Palm Beach, Kendall, Homestead, the Keys, and many surrounding areas. Our highly trained technicians are experts in all things relating to auto glass. We work with individual vehicle owners and their insurance companies, as well as with corporate fleet accounts, providing the same exceptional customer service that has earned for us a reputation as one of the top auto glass companies in the area. We believe in doing business the old fashioned way, treating customers as we would want to be treated. That’s why our slogan is “The Difference is Obvious”.

If you’d like more information about our company or the services we provide, visit our website, or give us a call at any of our four locations:

Dade: (786) 272-5603                        Broward: (877) 336-7217

Palm Beach: (561) 717-7630             South West Florida (877) 336-7217