Common windshield damage falls into a handful of recognizable types: bullseye, star, half-moon, surface pit, combination break, floater, edge crack, stress crack, and long crack. The quick rule of thumb is that many chips under about 1 inch are repairable, but a crack that reaches the edge, sits in your direct line of sight, or shows signs of contamination often calls for replacement instead.

TL;DR:

• Chips larger than a quarter or cracks exceeding 14 inches almost always require replacement instead of repair.
• Damage near the windshield edge or involving multiple cracks, debris, or moisture trapped inside will likely need full replacement.
• Repair of chips in the primary sightline or near ADAS cameras is often avoided, even if the damage is small.
• Immediate protection measures, such as taping the chip and avoiding temperature fluctuations, can prevent damage from worsening.
• Professional repair typically takes around 30 minutes and may be fully covered by insurance, especially if conducted promptly.

Table of Contents

• Common windshield chip and crack types explained
• How big can a chip be and still get fixed?
• What to do right now if you get a chip
• Simple habits that keep cracks from spreading
• What technicians actually check before repairing a chip
• Where these repair guidelines come from
• Protecting your windshield after a chip repair
• Sources
• FAQ

Common windshield chip and crack types explained

Windshield damage has a shape and a name, and knowing which one you’re looking at tells you a lot about whether a repair shop can fix it or whether you’re looking at a full replacement.

A star break radiates thin cracks, or legs, out from a central impact point like spokes on a wheel. The more legs it has and the longer those legs run, the harder it becomes to repair cleanly, since resin has to fill every crack without trapping air.

A bullseye is a clean, circular ring of damage with a dark pit at its center, usually caused by a rounded object like a pebble striking the glass directly. These tend to be some of the easiest chips to repair, provided the diameter stays around 1 inch or smaller and the damage isn’t sitting in the driver’s primary viewing area.

A half-moon, sometimes called a partial bullseye, looks like a crescent shape instead of a full circle. It follows the same basic repair logic as a bullseye but with slightly less material for the resin to bond around, so a technician needs to check the edges more carefully.

A surface pit is minor: a small crater in the glass where a tiny piece of material actually came out, rather than the glass just cracking. These are mostly cosmetic and typically simple to fill.

A combination break mixes patterns, such as a star break sitting inside a bullseye ring. Because two damage types overlap, the repair is more involved and the resin has to address multiple failure points at once.

A floater, or floating crack, is a crack that doesn’t touch either edge of the windshield. Depending on its length, it may still qualify for repair, since cracks that stay contained within the glass are generally more stable than ones that reach an edge.

An edge crack touches the perimeter of the windshield, where the glass is under the most stress from the frame. These often require replacement because cracks at the edge spread faster and threaten the structural bond holding the glass in place.

A stress crack appears without an obvious impact point, often the result of temperature swings or pressure changes rather than a rock strike. Whether it’s repairable depends heavily on where it sits and how far it has traveled.

A long crack is exactly what it sounds like: length that exceeds standard repair thresholds. Once a crack gets long enough, most technicians recommend replacement over repair.

• Star breaks with three or more legs are harder to repair cleanly than a simple bullseye.
• Surface pits are usually the easiest and cheapest type of damage to fix.
• Combination breaks and long cracks are the two types most likely to need replacement instead of repair.

How big can a chip be and still get fixed?

Industry guidance gives fairly specific size limits for what counts as repairable. Under the ANSI/AGSC/NWRD/ROLAGS 002-2022 standard, bullseye and half-moon chips are generally repairable up to 1 inch (25 mm), combination breaks up to a 2 inch (50 mm) body, star breaks up to 3 inches (75 mm), and cracks up to 14 inches (350 mm) in some repair contexts. Treat these as standard industry guidance rather than a fixed rule for every vehicle, since location and complexity still override size.

A chip smaller than a quarter is often repairable, and a crack shorter than a dollar bill can sometimes be fixed too, according to AAA, which makes a quarter and a dollar bill handy household tools for a rough field check. Location matters just as much as size: damage sitting in the driver’s primary viewing area, or anywhere near an ADAS camera bracket, often pushes a shop toward replacement even when the chip itself is small enough to qualify.

A few red flags mean replacement regardless of measurement:

• Damage that has penetrated both glass layers rather than just the outer one.
• Three or more long cracks radiating from a single impact point.
• Visible dirt, moisture, or debris trapped inside the chip that can’t be cleaned out.
• Cracks that intersect more than one edge of the windshield.

What to do right now if you get a chip

Speed matters. A small chip can widen into a full crack surprisingly fast, since GEICO notes that temperature changes and everyday driving stress push minor damage toward replacement territory if it sits untreated.

1. Cover the chip with a small piece of clear tape to keep out dirt and moisture until you can get it looked at.
2. Avoid slamming doors, hitting potholes, or blasting the defroster on high, since sudden pressure or temperature changes encourage cracks to spread.
3. Skip household glue or super glue, which can cloud the glass and make a proper repair harder later.
4. Get it assessed within a few days rather than waiting, especially if the chip is anywhere near your sightline.

Professional windshield chip repair is often completed in around 30 minutes, per Allstate, whether it’s done at a shop or through a mobile technician. Many comprehensive insurance policies waive the deductible entirely for chip repair, so it’s worth checking with your insurer before paying out of pocket. Our windshield repair time page and rock chip repair cost breakdown cover what to expect in more detail.

Simple habits that keep cracks from spreading

Most chips start with something you can’t control, a rock kicked up from the car ahead. But a few habits cut down how often it happens and how far damage travels once it does.

• Leave extra following distance behind gravel trucks, on construction routes, or on freshly graveled roads.
• Park in shade when you can, and avoid running the defroster on max heat against a frozen windshield.
• Use a sunshade in hot climates to reduce the temperature swing between a parked car and a moving one.
• Check any existing chip regularly for signs it’s spreading, and keep it dry and taped in the meantime.

Some drivers also use protective windshield films or professional sealant products designed to stabilize a chip until repair, though these are stopgaps, not fixes. For more on preventing spread once damage has already started, see our guide on stopping a windshield crack from spreading.

Pro Tip: Check any chip within 24 hours of noticing it. The window between “small fix” and “full replacement” often closes faster than drivers expect.

What technicians actually check before repairing a chip

Windshields are laminated, two layers of glass bonded by a PVB interlayer that holds the glass together on impact instead of letting it shatter. That’s why repair technicians focus on the outer layer: filling it with resin restores clarity without disturbing the interlayer that keeps the windshield structurally sound.

Before starting any repair, a technician checks for inner-layer damage, trapped contamination, the number of cracks radiating from the impact, and whether the chip sits anywhere near an ADAS camera mount. Our automotive windshield chip repair page covers what that assessment looks like in practice, and it’s the same logic behind why quick action after a chip tends to save both money and the original glass.

— Jake

Where these repair guidelines come from

The size and repairability thresholds referenced here come from the ANSI/AGSC/NWRD/ROLAGS 002-2022 standard, insurer guidance from Allstate and GEICO, and driving guidance from AAA. For a closer look at DIY resin kits and their limits, FrenzyCars’ guide to windshield repair kits is a useful third-party resource.

Protecting your windshield after a chip repair

Fixing a chip is one part of protecting your windshield. What happens to your car in the months after matters too, and that’s where a clean, professional approach to auto care pays off. Beyond glass repair, a climate-controlled installation environment helps ensure no dust or debris settles into wet films or coatings during installation.

If you’re already dealing with chip repair, it’s a good time to think about broader protection. Paint protection film shields the front of your vehicle, the area most exposed to the same rocks and debris that chip windshields, and ceramic coatings add a layer of defense against the elements. Installations may be backed by warranties to help ensure lasting quality. Get a custom quote and see what fits your vehicle and your budget.

Sources

• ANSI/AGSC/NWRD/ROLAGS 002-2022
• Allstate — Windshield damage
• AAA — Windshield repairs: when to fix vs. replace
• GEICO — How to get a cracked or chipped windshield repaired
• 3M — Windshield repair kit product information

FAQ

What are the different types of windshield chips?

The main types are bullseye, star break, half-moon, surface pit, combination break, floater, edge crack, stress crack, and long crack. Each has a distinct shape and a different repairability outlook depending on size and location.

What kind of windshield chips cannot be repaired?

Damage that penetrates both glass layers, has three or more long cracks radiating from one point, contains contamination that won’t clean out, or reaches the windshield edge is typically not repairable. Chips sitting in the driver’s primary viewing area or near an ADAS camera often require replacement even when small.

What type of windshield chip can be repaired?

Bullseye and half-moon chips up to about 1 inch (25 mm), combination breaks up to a 2 inch (50 mm) body, and star breaks up to about 3 inches (75 mm) are generally repairable under ANSI/ROLAGS guidance. Location and contamination still factor into the final call.

What are the different types of windshield sealants?

Clear-resin repair systems, like those made by 3M, are designed to fill small bullseyes, chips, star damage, and cracks up to 1 inch to restore clarity and slow spreading. Manufacturers generally recommend these for damage under 1 inch in diameter rather than larger cracks.

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