Summer Heat is Tough on Glass

If you have any kind of Rock Chip or small crack in your windshield, it’s time to get them repaired. Here are a few things to consider:

  1. When your windshield is sitting in the sun all day with the windows up, the temperature rises incredibly. This makes the glass soft, unstable and weak.  Driving causes your car to naturally flex, so when the car flexes, so does the glass. This will cause a small crack to completely break.
  2. If you spray your windshield washer fluid onto hot glass, the sudden change in temperature will cause any weakness in the glass to completely crack. Just like when you pour water into a glass full of ice, you hear the cracking ice cubes. Same physical laws apply with glass.
  3. Sometimes a vehicle can get so hot, it will break the tempered glass, which can lead to an expensive replacement. To help avoid this, keep a few windows slightly down during the hot days in the sun. This will allow the inside of the vehicle to cool down and not have heat and pressure build up in your car.

1 Comment


  1. Wow! I had no idea that this could be a factor in my cracked windshield. I have always wondered why sometimes my windshield would seem to just break for no reason. In hind sight, I now see the problem could have been avoided.

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