A windshield can be considered “too bad” if it compromises the safety and visibility of the driver. Here are some signs that indicate a windshield may need attention or replacement:

1. Cracks: Cracks can impair visibility and compromise the structural integrity of the windshield, especially if they are in the driver’s line of sight.
2. Chips: While small chips may seem insignificant, they can develop into larger cracks over time, especially with temperature changes and vibrations from driving.
3. Spiderwebbing: When a windshield is struck with significant force, it can develop a pattern of cracks resembling a spider web. This can obstruct visibility and compromise safety.
4. Extensive damage: If the windshield has extensive damage, such as multiple cracks or large areas of damage, it may no longer provide adequate protection in the event of a collision.
5. Legal requirements: In some jurisdictions, there are laws regulating the condition of windshields. If the damage exceeds certain limits outlined in local laws, it may be illegal to drive with that windshield.

If your windshield exhibits any of these issues, it’s advisable to have it inspected by a professional. They can assess the extent of the damage and recommend whether repair or replacement is necessary for your safety on the road.

Whether a windshield should be replaced depends on the extent and severity of the damage. Here are some factors to consider:

1. Size and location of damage: If the damage is small, such as minor chips or cracks that are less than a few inches in length, it may be possible to repair the windshield instead of replacing it. However, if the damage is extensive or located in a critical area (such as directly in the driver’s line of sight), replacement may be necessary.
2. Severity of damage: If the windshield has significant damage, such as large cracks, spiderwebbing, or extensive chips, replacement is often the safest option. Even if the damage seems minor, it can compromise the structural integrity of the windshield and increase the risk of it shattering during a collision.
3. Safety considerations: The primary purpose of a windshield is to protect occupants in the event of a crash by preventing them from being ejected from the vehicle and by providing structural support to the vehicle’s roof. If the windshield is compromised, it may not provide adequate protection in a collision, putting occupants at greater risk of injury.
4. Legal requirements: In some jurisdictions, there are laws governing the condition of windshields, and driving with a damaged windshield that impairs visibility may be illegal. If the damage exceeds the limits set by local laws, replacement may be necessary to ensure compliance.

Ultimately, it’s best to consult with a professional auto glass technician to assess the damage and determine whether repair or replacement is the most appropriate course of action for your windshield. They can provide expert advice based on the specific circumstances and ensure that your vehicle remains safe and roadworthy.