Well Dave all I can tell you is what happened to me and I have no reason to lie about it, the windshield was being covered by insurance whether my fault or not. I know there were no dings in the windshield because I cleaned all the glass inside and out not so long ago. There was nothing touching the glass inside or out. The only thing different are the new lights put on the first week in January using the same factory mounts, using the same bolts the only difference being I had to use an extension so the lights would clear the roof, that's it. As for closing the door not being able to break the glass well that's exactly what happened. As for why I really don't know, I'm no expert. Also as I said the glass place here was not surprised at all and said mine was not the first one they have replaced along with cars and trucks that the back window blows out of them. All I can tell you is I'll be glad to have it back today. Thanks for your reply and giving me your take on it.The way thieves used to break into cars was by throwing a piece of spark plug ceramic at the tempered side windows.
The only reason laminated glass is used in the windshield of cars and trucks is to keep those with no seat belt on inside the car. The other windows are tempered. The tempered glass is much stronger so a branch or similar wont damage it.
Closing the cab door is not going to do it. I have hit some tempered glass with a 12 lb sedge hammer and it bounced off.
There are glass breaking and seat belt cutting tools for those who want to rescue someone after an accident.
The glass breaking tool's important detail is a very hard, very pointed tip.
![]()
Make certain nothing like your roof work lights mounting bolt can touch the edge of the glass. Something has created a pressure point.
Perhaps something in the cab structure has allowed the windshield area to rack and thus press against the edge of the glass. An improper install can do this but this is very rare.
Dave
All the best, Donnie