Auto Glass Heat Stress: Why Summer Cracks Happen More Often
Why Does Summer Heat Make Your Windshield Crack?
Summer is a time of fun, sunshine, and outdoor adventures. However, it also brings an increased risk of a typical yet unexpected problem: auto glass cracks. Many drivers notice their windshields or windows suddenly developing cracks during the hotter months, and understanding why this happens can help prevent costly repairs. The culprit? Heat stress on your auto glass.
What Is Heat Stress on Auto Glass?
Auto glass, particularly windshields, is made from laminated glass. This is a layer of plastic sandwiched between two sheets of glass. This design offers strength and safety, but it also makes the glass sensitive to thermal fluctuations. When exposed to high temperatures and then rapidly cooled, the glass can experience stress. This stress causes microfractures, which may develop into visible cracks over time.
Why Does Summer Cause More Cracks?
Several factors contribute to increased crack formation during summer:
1. Intense Sun Exposure
On hot, sunny days, the temperature inside your car can skyrocket, often reaching 140°F (60°C) or higher. The glass absorbs this heat, expanding as it does. If the temperature changes quickly—such as parking in the shade and then moving into the sun—the glass experiences uneven expansion, creating stress points that can lead to cracks.
2. Rapid Cooling
Conversely, when a vehicle parked in the sun is exposed to cold water (like sprinklers or rain), the outside of the glass cools rapidly while the inner layers remain warm. This rapid cooling causes the outer surface to contract quickly, leading to internal stress and potential cracking.
3. Sun Damage and Material Fatigue
Prolonged exposure to ultraviolet (UV) rays weakens the glass over time, making it more susceptible to cracking. UV rays gradually degrade the structural integrity of the glass, especially if the windshield already has minor chips or previous damage.
4. Increased Use of Air Conditioning
During summer, many drivers rely heavily on air conditioning. The sudden increase in temperature difference between the cool interior and the hot exterior can intensify stress on the glass, especially if the windshield has any existing weaknesses.
What Are Some Common Causes of Summer Cracks?
While heat stress is a primary factor, other summer-related conditions can also contribute to the development of cracks:
- Pre-existing Damage: Small chips or cracks from road debris can expand rapidly under heat stress.
- Poor Installation: Improperly fitted windshields are more vulnerable to environmental stressors.
- Temperature Fluctuations: A series of hot days followed by cooler nights can cause repeated expansion and contraction cycles, weakening the glass over time.
Preventative Measures to Protect Your Auto Glass
Protecting your vehicle’s glass during summer is crucial. Here are some tips:
- Park Smart: Whenever possible, park in shaded areas or indoors. Use sunshades or windshield covers to reduce interior temperature buildup.
- Avoid Sudden Temperature Changes: Don’t pour cold water on a hot windshield. Instead, allow the vehicle to cool gradually.
- Inspect Regularly: Check for small chips or cracks, especially after driving on rough roads or during storms.
- Use Quality Windshields: When replacing or repairing, ensure professional installation and use high-quality glass.
- Apply UV-Protection Films: Consider tinted or UV-protective films that help reduce heat penetration.
What To Do If You Find a Crack in Your Auto Glass
If your auto glass develops a crack, address it promptly. Small cracks can often be repaired if detected early, thereby preventing the need for a full windshield replacement. Ignoring cracks can lead to their expansion, especially during summer’s stress-inducing conditions.
Do You Have Auto Glass Damage in Boise, ID, or Aurora, CO?
If you’re in the Aurora, CO, or Boise, ID areas and have discovered damage to your windshield, contact us at Chip Pros Auto Glass. We also serve Nevada and Montana. With more than 40 years of experience, the technicians at Chip Pros Auto Glass will get you back on the road with the structural integrity of your auto glass fully intact.
