Why Seasonal Changes Can Worsen Existing Windshield Cracks
Posted in Windshield Repair, on January 09, 2026
As the weather changes and temperatures fluctuate, so does the state of your auto glass. Surprisingly, cold weather is one of the most damaging conditions for any kind of auto glass. Before you know it, a small chip on your windshield can turn into a large crack overnight, leaving you needing windshield repair. Understanding the impact of seasonal weather changes on your windshield can help prevent existing cracks from worsening and help you avoid the need for an entire windshield replacement in Aurora. Address small cracks early at MRM Auto Glass. Contact our team with over 25 years of experience to learn more.
Here is a breakdown of how seasonal changes worsen existing windshield cracks.
How Freezing Temperatures Cause Windshield Contractions
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The reason why winter weather in particular is so damaging to existing windshield cracks is due to the freezing temperatures. When auto glass is exposed to cold temperatures, the glass will naturally contract. This motion can weaken your windshield and even cause tiny cracks to form. However, if you already have an existing crack on your windshield, this contracting can make it even worse. As the glass tightens, existing chips and cracks become pressure points, making them prone to expanding. This is why it is always highly recommended that you take your car in for windshield repair as soon as you notice even a tiny crack or chip.
Sudden Heat from Defrosters Creates Thermal Shock
In the winter months, most drivers tend to blast the heat in their cars, particularly their defroster. However, allowing hot air to flow directly onto a freezing cold windshield can pose some risks. This phenomenon can cause thermal shock, which is the process by which auto glass cracks or shatters due to sudden changes in temperature. If you have an existing crack, then the sudden change in temperature will likely cause it to expand further. In the winter, ensure you heat up your car gradually by turning up the temperature without maxing out the airflow. This will provide gentle warmth that can be turned up as the windshield warms up.
Ice and Winter Driving Conditions Accelerate Crack Growth
Temperature aside, other winter conditions like ice and snow can also accelerate the growth of existing windshield cracks. Salt is often laid all over public roads in the winter, and as you drive, you may find that small chunks are kicked up off the road and onto your windshield. While generally harmless, a small piece of salt travelling at a high enough velocity can compromise an existing chip. What many drivers do not realize is that once you have a cracked windshield, it loses its structural integrity and becomes much more prone to damage. This is why extra caution needs to be taken, especially during the transitions into and out of winter.
Avoid Seasonal Windshield Replacements with MRM Auto Glass
If you already have a cracked windshield, caution must be taken while you use your car through the winter. Failing to do so may lead to you needing a windshield replacement in Aurora at some point during the season. Instead of putting your vehicle at risk of serious damage, visit MRM Auto Glass for reliable windshield repair. Call now to get started!
