#windshield care

Winter in Ottawa can be breathtakingly beautiful — the shimmering snow, the frosted trees, and the crisp morning air. But for drivers, those sub-zero temperatures bring a set of challenges that can affect not only the roads but also your vehicle. One of the most overlooked victims of Ottawa’s winter weather is your car’s windshield. Understanding how cold conditions impact auto glass can help you prevent costly damage and stay safe on the road.

The science behind winter windshield stress

When temperatures plummet, your windshield experiences a constant cycle of expansion and contraction. Glass slightly expands when heated and contracts when cold, but Ottawa’s extreme temperature swings — from freezing nights to milder afternoons — put your windshield under serious pressure. Over time, this stress can cause tiny chips to expand into long cracks.

In addition, the glass can become more brittle in freezing weather, making it more vulnerable to impact from road debris or ice. Something as small as a pebble kicked up by another vehicle can leave a lasting mark.

The role of sudden temperature changes

A common winter mistake many Ottawa drivers make is blasting the defroster on high heat to clear an icy windshield quickly. This sudden temperature change creates thermal shock — a rapid expansion of the inner glass layer while the outer layer remains cold. The result? A crack that spreads across your windshield before you even reach the end of your driveway.

To avoid this, always warm up your car gradually. Use the defroster on a low setting first and allow your windshield to heat evenly.

Road salt, ice scrapers, and windshield wear

Road salt is a double-edged sword for Ottawa drivers. It keeps the roads safe from ice, but when it mixes with melting snow and is splashed onto your windshield, it can leave behind a layer of grime that weakens visibility. The salt particles can also be abrasive, potentially scratching the glass when you use your wipers.

Similarly, using metal or hard plastic ice scrapers can leave fine scratches that may worsen over time. Always choose a soft-edged scraper or use a de-icing spray before scraping to reduce friction.

Preventing cracks and chips during Ottawa’s winter

Ottawa’s winter roads can be unforgiving, but there are steps you can take to protect your auto glass:

Keep a safe distance – Stay several car lengths behind snowplows or large trucks, as they often kick up rocks and ice chunks.

Repair small chips promptly – Even minor chips can expand in freezing temperatures. Contact a professional for quick repairs before the damage spreads.

Avoid slamming car doors – Believe it or not, the shockwave from a hard door slam can cause existing cracks to grow.

Use proper washer fluid – Make sure your windshield washer fluid is rated for sub-zero temperatures to prevent it from freezing and damaging the system.

Park indoors when possible – A garage or covered parking space helps protect your windshield from sudden temperature changes and falling ice.

If you do find a chip or crack, it’s best to seek professional help. Expert windshield repair in Ottawa can often restore the glass without the need for a full replacement, saving you both time and money.

Fun fact: Your windshield is stronger than you think!

Did you know that modern car windshields are made from laminated safety glass — a layer of plastic sandwiched between two layers of glass? This design not only keeps the glass from shattering into dangerous shards but also adds structural integrity to your vehicle. In fact, your windshield provides up to 30% of your car’s roof strength during a rollover. That’s why maintaining it in top condition is so important, especially during Ottawa’s tough winter months.

Drive confidently this winter

Don’t let a cracked windshield slow you down this winter. Whether you need a quick repair or a full replacement, our team is ready to help. With professional auto glass repair and replacement, advanced repair systems, and same-day service, you can get back on the road safely and quickly.

So this winter, drive smart, stay warm, and trust Auto Glass Ottawa to keep your windshield crystal clear all season long.

Your windshield is key to your safety, but everyday habits damaging windshield like using hot water to defrost or slamming car doors can unknowingly cause damage. Small actions add stress to your glass, and understanding these common causes helps you protect your windshield and avoid costly repairs.

Here are 5 habits to watch out for:

Pouring hot water on a frozen windshield

Ignoring worn-out wiper blades

Slamming car doors too hard

Parking under direct sunlight for hours

Speeding over potholes and bumps