Windshield repair in Cary, NC: chips and short cracks, fixed where you park

What windshield repair actually does

A windshield is two layers of glass with a plastic layer bonded between them. A stone usually breaks only the outer layer, leaving a small crater with cracks running out of it. A repair cleans out the break, fills it with resin and cures the resin, so the damaged spot is bonded together again and stops growing. Impex’s own description of the benefit is that timely windshield repair restores strength, improves visibility and helps prevent a costly replacement.

A repair is not invisible. What it does is stop a small problem becoming a big one. The alternative, once a crack has run across the glass, is a full windshield replacement in Cary, which means removing the old glass, setting new glass in urethane and, on many cars, calibrating the forward camera.

Which chips and cracks can be repaired

The repair trade works to a written standard, the Repair of Laminated Automotive Glass Standard, known as ROLAGS. Its published guidance is that stone breaks up to two inches in diameter and single line cracks up to 14 inches are repairable. ROLAGS also defines the words technicians use: a short crack is 6 inches or less, a long crack is more than 6 inches, and an edge crack is one that runs to the edge of the glass.

Size is only half of it. Impex’s test is that damage which is small, shallow and away from the edges of the glass can usually be repaired. Its rule of thumb for chips is smaller than a quarter. A common industry rule of thumb for cracks is anything shorter than a dollar bill, about 6 inches. Neither is a law or a standard; they are quick guides for a driver looking at the glass.

Damage	Repair or replace?	What decides it
A chip smaller than a quarter, away from the edge	Usually repair	Impex’s rule of thumb
A stone break up to two inches across	Often repair	Within the ROLAGS limit, if not too deep
A single crack up to 6 inches (a short crack)	Often repair	Within the ROLAGS limit and the dollar bill rule of thumb
A single crack between 6 and 14 inches	Sometimes repair	ROLAGS allows single line cracks up to 14 inches; a technician has to see it
A crack that runs to the edge	Usually replace	Damage at the edge affects the structure of the glass
Damage in the driver’s line of sight	Usually replace	Impex repairs short cracks that are not in the driver’s line of sight
Deep damage through both layers	Replace	Large or deep damage means replacement

Where the damage is matters as much as how big it is. A chip right in front of the steering wheel is in the area the driver looks through all the time. Damage near the camera panel at the top of the glass can matter for the driver assistance systems. And a crack that reaches the edge sits where the windshield is bonded to the car. In each of those cases a technician may advise a replacement even when the damage is small.

Why a Cary chip is worth fixing soon

A chip that is left alone can spread. Impex’s own guidance is that once a crack spreads too far or reaches the edge of the glass, a full replacement is the safer choice, and that timely repair helps prevent a costly replacement. A small chip is the simplest glass problem a car can have, and it stays simple only while it is small.

Cary’s roads make chips common. I-40 runs along the north of town to RDU and Raleigh, US 1 and US 64 run through the south, and the NC 540 Triangle Expressway runs along the west. The Complete 540 project opened 18 miles of new road from the NC 55 Bypass in Apex to I-40 and US 70 on September 25, 2024, and the next phase toward Knightdale is under way until 2028. Highway speed and construction traffic mean stones.

North Carolina’s load law, G.S. 20-116(g), requires trucks over 7,500 pounds carrying rock, gravel or stone to keep the load six inches below the walls and covered by a tarpaulin, because stone off a load is a road hazard. Even so, chips happen. When one does, note where and when it happened, keep an eye on it, and call while it is still small. The article on NC’s gravel load law explains the rule and what to do after a hit.

What happens at a windshield repair visit

1. You describe the damage. Size, where it is on the glass, and the car. If it sounds too big, Impex will say so before anyone drives out.
2. The technician looks at it on the car. Depth and small legs off the chip are easier to judge in person. If it is not repairable, you will hear why and what a replacement involves.
3. The break is cleaned and filled. Loose glass and dirt come out of the chip, resin goes in, and the resin is cured so it bonds the break.
4. The surface is finished. The repaired spot is smoothed level with the glass.
5. You drive on. The original glass stays in the car, so there is no urethane to cure and no camera to calibrate.

Impex’s guidance for its Cary customers is that a windshield repair is quick, often under 30 minutes. Because it is done where the car is parked, a repair can happen in an office lot during the working day or in your driveway at home. How the mobile visit works is explained on the mobile windshield replacement page; the same van and the same arrangements apply to repairs.

Repair or replacement: how the choice is made

The choice is made on the glass, not on the price. If the damage is within the ROLAGS limits, shallow, away from the edge and out of the driver’s view, a repair is the sensible answer. If it is large, deep, at the edge or in front of the driver, a new windshield is the safe one, because the Auto Glass Safety Council describes the windshield as part of the passenger restraint system: it has to be sound for the airbags to deploy properly and to help keep people in the car.

If a repair is not possible, the windshield replacement page explains the visit, the VIN check, the drive-away time and the camera calibration. If the broken glass is a door window or the back glass rather than the windshield, those cannot be repaired the same way: see auto glass repair in Cary.

Paying for a windshield chip repair in NC

A stone chip is a comprehensive claim in North Carolina. The NC Department of Insurance lists “Missiles or falling objects” and “Breakage of glass” among the losses comprehensive coverage pays for, less any deductible. North Carolina has no zero-deductible glass law. In practice, Impex’s insurance guide notes that many insurers waive the deductible for windshield chip repair, because a repair now prevents a replacement later. Whether yours does depends on your policy, so ask.

You choose who does the repair. Under G.S. 58-3-180 your policy must let you select the repair service, and the insurer pays the same amount whichever one you choose. A glass claim is not an at-fault accident and does not add Safe Driver Incentive Plan points, though insurers can look at how often you claim. Impex says it works with all major insurance providers. The full process is on the insurance claims page.

Windshield repair across Cary and the nearby towns

The mobile service covers all of Cary, from downtown and the Cary Parkway loop to the NC 540 side of town, and the towns around it. If you live or work south of Cary, see windshield repair in Apex. North of town, Impex covers Morrisville and RTP. Further south, it covers Holly Springs and Fuquay-Varina.

Questions people ask