Windshield Repair in Sanford, NC: Chips and Short Cracks

What can be repaired

The standard for windshield repair is ROLAGS, the Repair of Laminated Automotive Glass Standard, now published as ANSI/AGSC/NWRD/ROLAGS 002-2022. Its consumer guidance says stone-breaks up to two inches in diameter and single-line cracks up to 14 inches are repairable. It sorts cracks by length: a short crack is six inches or less, a long crack is more than six inches, and an edge crack is one that reaches the edge of the glass.

Those are the outer limits of what a trained technician can fill. Day to day, the industry uses simpler rules of thumb. Impex describes small chips as those smaller than a quarter, and another common rule says damage smaller than a dollar bill, about six inches, is likely repairable. Neither is a law or a standard; they are a quick way to judge from the driver’s seat.

The kinds of break you might see

• Bullseye. A round, cone-shaped mark with a clear ring. Usually a good repair if it is small.
• Star break. A small impact point with short legs running out from it. Repairable when the legs are short, but the legs are what spread.
• Combination break. A bullseye with legs. Judged by its overall size.
• Single crack. A line from an impact point. A short one can often be filled; a long one may need replacing depending on where it runs.
• Edge crack. A crack that reaches the edge of the windshield. Usually a replacement, because the edges carry much of the glass’s strength.

When windshield repair in Sanford, NC is not the right answer

Impex’s own rule is straightforward: a repair may be possible if the chip or crack is small, shallow and away from the edges of the glass. If the damage is large, deep or reaches the edge, a full replacement is safer, because the structural strength and the clarity needed for the car’s safety systems may be compromised. Other signs that point to new glass:

• The damage is right in front of the driver. A filled chip is much harder to see than an open one, but it is not invisible, and in your direct view even a small mark can catch the light.
• The chip is in the area the windshield camera looks through. Glass in front of the camera has to be clear for lane and collision systems to read the road.
• There are several chips, or dirt and water have been in the break for a long time.
• The inner layer of glass is damaged too, or you can feel the break from inside the car.

When it does need replacing, the windshield replacement in Sanford, NC page walks through that job, and the repair or replace guide goes deeper into the sizes and what a 12-inch crack means.

Why to call soon after a chip

A chip is a weak point in the outer layer of glass. Every change of temperature, from a cold Lee County morning to a car parked in afternoon sun, makes the glass move slightly, and that movement works on the edges of the break. Running the defroster hard on cold glass, slamming a door or driving over rough railroad crossings does the same. A star break can grow legs, and legs can join into a crack that runs to the edge, which takes a repairable chip into replacement territory.

A chip that has stayed clean is also easier to fill. Dirt, car wash soap and rain get into an open break over time, and what is in the break shows through the repair. If you cannot have it repaired straight away, keep the chip clean and dry, and avoid blasting hot or cold air straight at the glass until it is done.

How a chip repair is done

1. The break is inspected and cleaned. The technician checks the size, type and depth and clears loose glass and moisture from the impact point.
2. A repair tool is mounted over the chip. It seals against the glass and holds the resin injector exactly over the break.
3. The air is drawn out and resin is pushed in. Repair systems alternate vacuum and pressure so the resin flows into the legs of the break.
4. The resin is cured. Repair resin cures under ultraviolet light, and a thin layer goes over the impact point to seal it.
5. The surface is finished. Excess resin is scraped flush and the glass polished so the wipers pass over it cleanly.

A good repair stops the break spreading and restores much of the clarity, but it does not make the damage vanish: you will usually still see a faint mark where the stone hit. If you want the glass flawless, that is a replacement, not a repair.

Repair at home, at work or at an Impex shop

A chip repair needs much less room than a windshield replacement, which makes it well suited to a visit at home, at work, or wherever the car is parked during the day. The glass needs to be dry, so in rain a garage or carport helps. If you are passing Greensboro, Impex says it accepts walk-ins for minor repairs at its shop there. For how the mobile visit works in general, see mobile windshield replacement in Sanford.

Insurance and chip repair

In North Carolina, a chip from a stone is a glass breakage loss, and glass breakage is covered by comprehensive insurance, which the NC Department of Insurance says pays the cost of repair less any deductible. What you pay depends on your own policy: its comprehensive deductible and whether it includes full glass coverage. Ask your insurer how it treats repairs, or let Impex check with you. Whoever pays, you choose who does the work: under G.S. 58-3-180 the insurer must pay the same amount whichever repair service you select. More on the glass claims page.

Chips, cracks and NC inspection

North Carolina’s annual safety inspection (G.S. 20-183.3) checks the windshield wipers, not the glass itself, and NC has no statute or inspection rule setting a crack size. The wiper rule, 19A NCAC 03D .0536, rejects wipers that do not work freely, cannot clear rain and snow, or have damaged blades or arms. A chipped or cracked windshield is still a safety matter: a crack in your line of sight makes the road harder to read, and damaged glass is weaker in a crash.

Worn wiper blades are worth replacing after a chip repair, too. A blade with a nick or a hardened edge drags grit across the glass, and the repair is the one spot where it can catch.

Where Sanford chips come from

Most chips are stones. Sanford is where US 1, US 15/501 and US 421 meet, with NC 42 and NC 87 crossing the county, and heavy trucks use all of them. North Carolina law requires vehicles over 7,500 pounds gross weight carrying rock, gravel or stone to keep the load six inches below the sides and covered with a tarpaulin or other suitable covering (G.S. 20-116(g)), because loose stone is a hazard. Following a truck at a distance, especially on US 1 and the US 421 run toward Broadway and Lillington, cuts the number of stones that reach your glass. Our article on covered loads and road stones has more.

Impex repairs chips across the area: see Broadway, NC, Lillington, Pittsboro and Siler City, Southern Pines and Carthage and the full Lee County and nearby list. For side and back glass, which cannot be repaired the way a windshield can, see auto glass repair in Sanford, NC.

Questions people ask