Can a windshield crack or shatter from intense heat?

Yes, a windshield can crack or shatter from intense heat, but it typically requires extremely high temperatures or a combination of factors to cause this. Here are some ways in which intense heat can damage a windshield:

Sunlight and Magnification: On a hot, sunny day, the sunlight can be concentrated through the windshield if it passes through the glass at a certain angle. This can create a hotspot on the dashboard, and if there are objects like glass bottles or other items that can focus the sunlight's energy, it may lead to a crack.

Rapid Temperature Change: Sudden and extreme temperature changes can stress the glass and cause it to crack. For example, pouring very cold water on a hot windshield or exposing it to a sudden blast of hot air from a heater can lead to thermal stress and cracking.

External Fires: If a vehicle is parked close to a source of intense heat or a fire, such as a building or a wildfire, the extreme heat can cause the windshield to crack or shatter. This is especially true if the glass has any existing weaknesses or defects.

Poor Quality Glass: Low-quality or damaged windshields are more susceptible to cracking or shattering under extreme heat. It's essential to have high-quality, undamaged glass installed in your vehicle. Glass America uses only the highest quality adhesives, epoxies, and replacement glass. Our OEM (Original Equipment Manufacturer) quality glass provides the exact replacement windshield for the safest perfect fit.

To prevent windshield damage from intense heat, follow these tips:

  • Park your vehicle in a shaded area.
  • Use sunshades to block direct sunlight. 
  • Avoid exposing the windshield to sudden temperature changes.
  • Ensure that your windshield is in good condition and free of defects or cracks, as pre-existing weaknesses can make it more susceptible to damage.


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