How Big a Windshield Crack Can Be Repaired?

Size limits by damage type

The repair limit depends on the type of damage, not only on its length. ROLAGS section 6 lists a separate maximum for each damage type. Glass shops and insurers often publish simpler rules of thumb that are stricter than the standard. The table puts both side by side.

Damage type	What it looks like	ROLAGS repair limit	Common shop or insurer rule
Bullseye	A dark circle around the impact point	Up to 1 in (25 mm) across	About the size of a quarter (0.955 in) or smaller
Half moon	A partial bullseye	Up to 1 in (25 mm) across	About the size of a quarter or smaller
Combination break	A star inside a bullseye	Body up to 2 in (50 mm); the legs are not counted	Usually judged by the technician
Star break	Short legs spreading from the impact point	Up to 3 in (75 mm) across	Usually judged by the technician
Crack	A single line of separation	Up to 14 in (350 mm) long	Under 6 in, or about the length of a dollar bill (6.14 in)
Surface pit	A small nick that does not reach the plastic layer	Counts as damage from 1/8 in (3 mm)	Usually repaired with a chip repair

ROLAGS calls a crack of 6 inches or less a short crack and a crack longer than 6 inches a long crack. Both are repairable up to 14 inches. For the full chip rules, see how big a windshield chip can be to be repaired.

Why you hear 6 inches from one source and 14 inches from another

Three different rulebooks answer the question, and each one sets a different limit. The industry standard says what a trained technician can repair. A company policy says what one chain or insurer agrees to repair. A state or federal rule says what a vehicle needs to pass inspection.

Rulebook	Who sets it	Crack limit	Chip or break limit
Repair standard	ROLAGS 002-2022 (ANSI, Auto Glass Safety Council)	Up to 14 in	Bullseye 1 in, combination break 2 in, star break 3 in
Company policy	Safelite, Progressive and many other shops and insurers	Under 6 in	Smaller than a dime (Safelite) or a quarter (AAA)
Federal rule for trucks and buses	FMCSA, 49 CFR 393.60	Any crack that no other crack crosses	Damage a 3/4-in disc can cover, at least 3 in from other damage
State inspection, example	New York, 15 NYCRR 79.21	Fails if longer than 11 in with any part in the wiper path	Fails if a star is larger than 3 in

The 6-inch figure is a company limit, not a limit in the standard. A shop can refuse to repair a 10-inch crack that ROLAGS would allow. In that case, another shop that offers long-crack repair may still be able to fix it.

Where the damage is matters as much as its size

Damage in the driver’s primary viewing area has much tighter limits than damage elsewhere. ROLAGS section 5.4 defines this area as a band 12 inches (300 mm) wide, centered on the driver’s position. The band runs from the top to the bottom of the wiper sweep and is measured on the outside of the glass.

Inside this band, ROLAGS says to replace the windshield in three cases:

• The damage is larger than 1 inch (25 mm) across.
• The finished pit would be larger than 3/16 inch (5 mm).
• The repair would sit within 4 inches (100 mm) of another repair.

The 4-inch spacing rule protects binocular vision. Two repairs close together can block the same spot for both eyes and create a blind spot.

Edges and sensors matter too. A crack that reaches more than one edge of the glass cannot be repaired. Damage near rain sensors, a head-up display or the forward camera also needs the vehicle maker’s guidance. Safelite says damage in the forward camera’s line of sight usually means replacement. If your car has a windshield camera, read about ADAS calibration after windshield replacement.

Damage that cannot be repaired at any size

Some damage needs a new windshield even when it is small. ROLAGS section 7 recommends replacement, not repair, in each of these cases:

• The damage goes through both the outer and the inner layer of glass.
• The damage is on the inner layer, the side facing the cabin.
• Three or more long cracks spread from a single impact point.
• Dirt or other impurities are trapped in the break and cannot be cleaned out.
• The plastic interlayer between the two glass layers is damaged or discolored.
• The pit at the impact point is larger than 3/8 inch (9 mm).
• A crack reaches more than one edge of the windshield.
• It is a stress crack. A stress crack starts at an edge and has no impact point.
• The technician judges that the repair would affect the safe operation of the vehicle.

A crack that starts from an impact point and reaches one edge is called an edge crack. One edge alone is not on the exclusion list, so it can still be within the repair limits.

How to measure the damage yourself

A few measurements tell you whether a repair is worth asking about before you call a shop.

1. Use a ruler or a coin. A US quarter is 0.955 in across, a dime is 0.705 in and a dollar bill is 6.14 in long.
2. Measure a bullseye or half moon across its widest point. Repair is within the standard up to 1 inch.
3. Measure a star break including its legs. The limit is 3 inches.
4. Measure only the body of a combination break. The legs are not counted, and the limit is 2 inches.
5. Measure a crack from end to end. Note whether it reaches an edge, and how many edges it touches.
6. Find the driver’s viewing band. Mark 6 inches to each side of the center of the steering wheel. Damage between the marks, inside the wiper sweep, falls under the stricter rules.
7. Check the inside of the glass. If you can see or feel the break on the cabin side, it is on the inner layer and needs replacement.
8. Take a photo with the coin next to the damage. A shop can give a better first answer from a scaled photo.

Measure soon after the impact. A crack can keep growing, so how to stop a windshield crack from spreading is the next step.

What a repair can and cannot do

A repair removes the air from the break and fills it with resin. ROLAGS section 4.13 defines repair this way. The cured resin is designed to approximate the refractive index of the glass, which reduces how much the damage scatters light.

A repair does not make the damage disappear. ROLAGS section 5.2 defines a cosmetic blemish as a remnant of damage that is still visible after the repair. Safelite also tells customers a slight blemish at the impact point is normal.

A repair can also fail. Safelite notes that, in rare cases, a repair attempt makes the damage larger. Safelite credits the repair cost toward a replacement when that happens.

After the work, ROLAGS section 9 asks the technician to inspect the repair from the driver’s seat. The finished repair should be free of significant light scatter, dirt, air pockets and other defects that could affect safe driving.

Repair or replace: cost and insurance

A repair costs much less than a replacement, and insurers often pay for it in full. Progressive says it charges no deductible for a windshield repair when the policy has comprehensive coverage. GEICO says it waives the deductible for glass repair when the policyholder has the right coverage. A replacement is usually subject to the comprehensive deductible.

Some states go further. Florida law (section 627.7288) says the deductible does not apply to windshield damage when a policy includes comprehensive coverage.

Prices vary by region, glass type and vehicle features such as cameras and heated glass. For current price ranges, see how much to repair a windshield crack and how much a windshield replacement costs. If you are unsure which route fits your damage, our guide to windshield repair vs. replacement walks through the decision.

Frequently asked questions

Can a 12-inch windshield crack be repaired?

Yes, under ROLAGS a 12-inch crack can be repaired if it is not a stress crack, does not reach more than one edge and does not go through both layers of glass. Many chains still cap repairs at 6 inches, so you may need a shop that offers long-crack repair. In New York, a crack longer than 11 inches that reaches the wiper path fails inspection.

How many chips can be repaired on one windshield?

ROLAGS does not set a total number, but repairs in the driver’s viewing band must be at least 4 inches apart. Safelite says more than three chips or cracks usually means replacement.

Can a DIY kit repair a crack?

DIY kits are made mainly for small chips. Nationwide’s guidance limits DIY repairs to cracks under 3 inches. Read do windshield repair kits really work before you try one on a crack.

Will a repaired windshield pass inspection?

It depends on the state. Virginia’s inspection rules allow repairs of minor damage only if the windshield still meets every inspection standard after the repair. See will a car pass inspection with a cracked windshield for state rules.

How long can I wait before repairing a crack?

Repair it as soon as you can. Dirt that gets into the break and cannot be cleaned out rules out a repair under ROLAGS. Read how long you can drive with a cracked windshield for the safety side.

Sources

• ANSI/AGSC/NWRD/ROLAGS 002-2022, Repair of Laminated Automotive Glass Standard, sections 4, 5.2, 5.4, 6, 7 and 9 (checked 22 October 2026)
• 49 CFR 393.60, Glazing in specified openings (FMCSA)
• 15 NYCRR 79.21, New York inspection procedure
• 19VAC30-70-210, Virginia windshield inspection rules
• Safelite Help Center: glass damage and service
• Progressive: glass repair vs. replace
• GEICO: glass claims guide
• AAA: windshield repairs, when to fix vs. replace
• Nationwide: can a cracked windshield be repaired
• Florida Statutes section 627.7288
• US Mint coin specifications and Bureau of Engraving and Printing currency facts