A rock flicks up off the 417, you hear the tick, and there is a fresh chip in your windshield. Now comes the question every Ottawa driver asks: stone chip repair or replacement? The answer comes down to a rule technicians use every day — the size-and-location rule — and getting the call wrong either way costs you money.

At JT Auto Glass Repair, our stone chip repair in Ottawa fixes most chips in about 30 minutes. But some damage genuinely needs a full windshield replacement. Here is exactly how professionals decide between stone chip repair or replacement.

Stone Chip Repair or Replacement: The Size Rule

The industry guideline used by the Auto Glass Safety Council is straightforward: chips larger than a loonie (about 25 mm, or 1 inch, in diameter) generally cannot be repaired. Cracks longer than about 7.5 cm (3 inches) fall in the same category.

Why does size matter? A resin repair works by filling the damaged area and restoring structural strength. Past a certain size, the resin cannot bond across the whole break, and the repair can fail under stress — temperature swings, road vibration, or the next hard bump.

Ottawa’s freeze-thaw cycles make size doubly important. A chip that is borderline in October can become a full crack by January, because moisture seeps into the break and expands when it freezes. When weighing stone chip repair or replacement, remember: the smaller the damage, the stronger the case for a quick repair.

Stone Chip Repair or Replacement: The Location Rule

Even a tiny chip can force a replacement if it sits in the wrong spot. Here is how location settles the stone chip repair or replacement question:

In the driver’s direct line of sight. Repairs leave a faint mark where the resin cures. A chip right in front of the driver can create a permanent visual distortion — and Ontario law requires an unobstructed view of the road. Damage here usually means replacement.

At the edge of the windshield. The outer few centimetres of glass carry much of the structural load. Chips at the edge compromise the bond between glass and frame, and they spread faster because stress concentrates there. Edge damage almost always means replacement.

Over a sensor or camera zone. Modern vehicles hide rain sensors and ADAS cameras behind the top of the windshield. Damage in these areas can distort what the camera sees, which is also why calibration matters after glass work is done.

Inside the wiper sweep is usually fine. Most repairs hold up well there, as long as the size and type of break qualify.

How the Type of Break Affects the Decision

Not all chips are equal:

Bullseye: a clean circular break — often the easiest to repair, with excellent results.

Star break: legs radiating from the impact point. Repairable when the legs are short and the overall size stays under the limit.

Combination break: several features at once. These are borderline cases — a technician really needs to see it in person.

Surface pit: a tiny nick with no cracking. Usually cosmetic; a repair can polish it out, or you can simply leave it.

If dirt or moisture has been sitting in the break for months, repair quality drops. Old, contaminated chips may look repairable but will not bond cleanly — another reason to get chips checked fast instead of waiting.

When Replacement Is the Right Call

Choose replacement when any of these apply: the chip is bigger than a loonie or a crack is longer than 3 inches; damage sits in the driver’s line of sight; the break reaches the edge of the glass; there are three or more separate chips; a previous repair has failed or the damage keeps spreading; or the inner layer of the laminated glass is damaged (you can feel it from inside the car).

A replacement is not a failure — it is the safe answer. Your windshield supports the roof in a rollover and helps airbags deploy correctly, so when the size-and-location rule points to replacement, take it.

Why Fixing Chips Fast Matters in Ottawa

Ottawa roads are brutal on chipped glass. Gravel from winter road maintenance, sudden temperature drops, and potholes all push small chips into long cracks. A $70–$100 chip repair today beats a full replacement later — and many insurance policies cover chip repairs with no deductible at all.

At JT Auto Glass Repair, we handle insurance claims directly and take up to $150 off your deductible on replacements. Every installation carries a lifetime warranty on workmanship and 1 year on the glass, and our mobile service comes to you anywhere in Ottawa.

What a Professional Chip Repair Looks Like

A proper repair takes about 30 minutes. The technician cleans the break, uses a bridge tool to inject clear resin under vacuum, cures it with UV light, then polishes the surface flush. A good repair restores structural strength and makes the damage nearly invisible — though a faint mark often remains, which is completely normal.

Be cautious with DIY kits for anything bigger than a tiny pit. They work on the same principle, but without professional vacuum equipment they trap air in the break — and a failed DIY attempt can make the damage unrepairable.

Frequently Asked Questions

How big a chip can be repaired?

As a rule of thumb, chips up to the size of a loonie (about 1 inch) and cracks under 3 inches are usually repairable. Location and type matter too — a small chip at the edge may still need replacement.

Can a chip be repaired if it has started to crack?

Sometimes, if the crack is short and fresh. Once a crack grows past about 3 inches or reaches the edge of the glass, replacement is the safe option.

Will the repair be invisible?

Mostly. A professional repair makes the damage very hard to see, but a faint blemish often remains. That is why chips in the driver’s direct line of sight usually call for replacement instead.

How much does stone chip repair cost in Ottawa?

Typically $70–$100 per chip, and many insurance policies cover it with no deductible. Call us at 613-854-4527 for an exact quote.

How fast do I need to fix a chip?

As soon as possible. In Ottawa, one freeze-thaw cycle or a hard pothole can turn a small chip into a long crack overnight. Cover it with clear tape and book a repair this week.

Not Sure? Get a Free Assessment — Call 613-854-4527

Send us a photo of the damage or stop by 2584 Edinburgh Pl Unit #9 in Ottawa. We will tell you honestly whether stone chip repair or replacement is right for your glass — and if a repair will do, we will say so. Get a free quote online or call 613-854-4527 today. We are open 8 AM to 8 PM.