It happens in a second. A dump truck pulls onto I-40 from a work zone, or you sit behind a loaded trailer on the Beltline, and there is a sharp crack against the glass. When you look, there is a bright star or a small bullseye in the windshield. This article covers what North Carolina law says about trucks and loose stone, who usually ends up paying for the damage, and what to do with the chip before it turns into a crack.
What North Carolina requires of trucks
North Carolina’s load law, G.S. 20-116(g), says no vehicle may be driven on a highway unless it is loaded to prevent any of its load ‘from falling, blowing, dropping, sifting, leaking, or otherwise escaping’. For trucks over 7,500 pounds gross vehicle weight carrying ‘rock, gravel, stone’, it goes further: the load must sit six inches below the walls of the truck and be ‘securely covered by tarpaulin or some other suitable covering’.
The law exists because loose stone is a road hazard. It does not stop every stone. Gravel caught in tire treads, between dual wheels or on a tailgate can come loose at speed even from a covered load, and stones can also be thrown up from the road surface itself.
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Can I make the trucking company pay?
Sometimes, but it is hard. To claim against the truck’s owner you would normally need to identify the truck, show that the stone came from it, and show that the load or the truck broke the rules. On a busy road at highway speed, most drivers cannot do all three. If you can, write down the company name, the truck number and the plate, the time and the exact place, and take photos of the truck if it is safe to do so, then give that to your insurer.
For most drivers the practical route is their own comprehensive coverage. The NC Department of Insurance lists ‘Missiles or falling objects’ and ‘Breakage of glass’ among the losses comprehensive pays for, less any deductible. A comprehensive glass claim is not an at-fault accident, so it adds no Safe Driver Incentive Plan points, though insurers may look at how often you file claims. North Carolina has no law waiving the deductible for glass, so the deductible on your policy decides what you pay; our insurance and claims page explains the steps.
The first few days after a chip
- Look at it closely. Note the size and where it is. A chip smaller than a quarter and away from the edge is usually a repair job.
- Cover it. A piece of clear tape over the chip keeps dirt and water out of the break until it is repaired.
- Go easy on temperature changes. Do not pour hot water on frosted glass, and do not aim the defroster or the air conditioning straight at the chip on full.
- Avoid slamming doors and rough roads where you can. Shock and flexing are what make a chip run.
- Get it repaired soon. A fresh, clean chip takes resin better than an old one full of grime.
Repair or new glass?
The ROLAGS repair standard says stone breaks up to two inches across and single line cracks up to 14 inches are repairable, but where the damage is matters as much as its size. Impex’s own rule is that a repair may be possible when the damage is small, shallow and away from the edges. A chip right in front of the driver, at the edge of the glass, or one that has already grown into a long crack, usually means a new windshield. Our page on windshield repair in Raleigh goes through the sizes; if yours is past repair, see windshield replacement in Raleigh.
Where stones fly around Raleigh
The roads with the most trucks throw the most stones: I-40 through the south of the city toward Garner and Clayton, I-440 around the centre, I-540 across the north and I-87 out to Knightdale and Wendell. NCDOT’s Complete 540 project, extending the Triangle Expressway from Apex to Knightdale with its second phase scheduled for completion in 2028, brings construction traffic to the southeast of the county.
The simplest protection is distance. Staying well back from trucks, and from any vehicle with mud and stones caught on its flaps, gives a stone time to drop before it reaches your glass. Changing lanes away from a truck that is shedding gravel is worth the few seconds it costs.
Getting the chip fixed in Raleigh
Impex Auto Glass repairs chips at your vehicle across Raleigh, Garner, Wake Forest, Clayton and Knightdale. Call the number on this page or send the quote form with a photo of the chip, and we will tell you whether it is a repair and set a time to come to you.
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Four short answers are enough to quote most jobs.
Questions people ask
Is a trucking company responsible for a chipped windshield in NC?
Only if you can show the stone came from that truck and the load or truck broke the rules, which is hard on a busy road. Most drivers claim under their own comprehensive coverage instead.
Does a rock chip claim raise my insurance in NC?
A comprehensive glass claim is not an at-fault accident, so it adds no SDIP points. Insurers may still consider how often you claim.
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