Stone Chip in Your Windshield? How to Assess and Repair It

A stone chip on your windshield is a small problem that turns into an expensive one if you ignore it. The chip itself is rarely the issue — it is the crack that can radiate from it. Temperature changes, the vibration from driving, even a car wash can turn a 15-millimetre chip into a crack spanning the entire windshield. Catching it early is the difference between a repair and a full replacement.

Can a Stone Chip Be Repaired?

Most stone chips can be repaired if they meet a few conditions: the chip is smaller than a two-dollar coin, it is in the outer layer of the laminate glass only, and it has not yet cracked into a line. The repair process uses a resin injected under pressure into the chip, which fills the void and bonds to the surrounding glass. When done correctly, the repair restores structural integrity and makes the chip significantly less visible.

If the chip has already cracked — even a short crack radiating from the impact point — repair is usually not viable. A crack compromises the structural bond of the laminate and cannot be sealed effectively. A repair on a cracked windshield will not hold.

Why Temperature Changes Are the Real Threat

In Vancouver, temperature changes are a significant driver of chip-to-crack progression. In summer, a car parked in direct sun heats the glass to temperatures well above ambient air temperature. In winter, the opposite happens. The differential stress caused by the centre of the glass expanding or contracting at a different rate than the edges creates exactly the kind of load that propagates a crack from a chip.

Leaving the car in direct sun with an existing chip, then parking it in a cold parkade overnight, is one of the most reliable ways to turn a chip into a crack. The sudden temperature shock is exactly what the glass does not need.

What to Do in the First 48 Hours

The best thing to do with a fresh chip is to get it repaired as soon as possible. If repair is not immediately available, there are temporary steps: apply clear tape over the chip to seal it from moisture and dirt, which reduces the risk of contamination that can prevent a good resin bond later. Do not use silicone or other adhesives inside the car — they are difficult to remove from inside the glass and can make the repair technician's job harder.

Park in shade rather than direct sun while you wait for a repair appointment. Avoid using the windscreen wipers on the chip area, which can stress the crack if one has already started. Do not blast the defroster on the chip — the thermal shock can crack it.

Repair vs Replacement: What Determines the Choice

The repair versus replacement decision is based on the size, location, and type of damage. A chip in the driver's line of sight that has fractured is not repairable — the repair resin cannot restore optical clarity well enough for an impact in the primary vision area. Replacement is required when the chip is in the driver's direct line of sight and has spread, or when it is large enough to obstruct vision even without cracking.

A chip in the passenger area or at the edges of the glass, even if slightly larger, may still be repairable. The critical factor is whether the repair will restore adequate optical clarity — if the chip is still visible and distracting after repair, the replacement is the better outcome.

ICBC and Glass Repair Coverage

ICBC's mandatory third-party liability insurance does not cover windscreen damage. However, if you have ICBC's optional comprehensive coverage, also known as Broadform or Extension coverage, windscreen repair and replacement are typically covered with no deductible or a reduced deductible depending on your policy. Contact ICBC directly or check your policy documents to confirm your coverage before paying out of pocket.

Some third-party auto insurance providers include windscreen coverage as a standard benefit. If you are not with ICBC for comprehensive coverage, check with your insurer — you may be covered for repair or replacement with no deductible.

When Replacement Is the Only Option

Once a chip has turned into a crack longer than a five-dollar bill, replacement is required. A cracked windshield is a structural safety component — it contributes to the car's rollover protection alongside the pillars and roof structure. A crack that extends across a significant portion of the glass, or one that reaches the edge of the windshield, cannot be repaired and must be replaced.

JRS Auto Customs can advise on whether your windscreen damage is repairable or requires replacement. If you have Comprehensive or Extension coverage through ICBC or another insurer, we can work with your claim directly. Book a consultation to have your windscreen assessed before the damage spreads.