Under certain conditions, a windshield with a crack can break. But it won't shatter into large, sharp pieces due to the laminated glass construction. The two layers of glass are held together by a thin plastic film, which prevents the glass from breaking into more dangerous fragments. When an object hits the windshield with enough force, it will cause the glass to break, but most of it will remain in place.
To avoid a windshield breakage, it's important to take proactive steps to repair the crack when you first notice it. Depending on the size of the crack, you may be able to repair it instead of replacing the entire windshield. It's important to note that using the word 'break up' may not be entirely accurate. The laminated glass construction ensures that the glass won't break into large, sharp pieces. Instead, it will usually break into smaller pieces and stay in place thanks to the inner plastic layer.
If the impact is strong enough, some glass may come off, but most of it will remain in place. To prevent a windshield breakage, you should take action as soon as you notice a crack. Depending on the size of the crack, you may be able to repair it instead of replacing the entire windshield. This will help ensure that your windshield remains intact and safe for driving.