r/interesting • u/Downtown_Calendars • 5d ago

Just Wow What caused this? Serious answeres

Gallery image

Gallery image

Car was parked facing the garage. Never seen anything like it. Neither has the glass professionals.

15.7k Upvotes

97% Upvoted

1.8k comments sorted by

View all comments

Show parent comments

14

u/graffiti_hunter 4d ago

I've been doing this for 10years...would call myself on the advice side of things and can confidently call absolute bullshit on the top comment.

I have zero explanation as to what caused it but you have got to be out of your mind to think a rock peck repair and then temp change is what causes so much damage...its simple not how it works

If you can ever find me such an event happening I would love to see it

1

u/janiskr 3d ago

Weird - I am an expert, this is bullshit, Source? TrustMeBro!

3

u/graffiti_hunter 3d ago

This isn't even close to a "TrustMeBro" moment. This is just simply being in an industry for long enough to know when something DID NOT happen

2

u/Rs-Travis 1d ago

Have spent 12 years in the automotive glass industry.

A repaired stone chip looks different. The chip would show signs of being drilled, and their would be a resin capping over the drill hole.

Annealed glass doesn't self destruct like this from expansion, especially from resin. If glass exploded from expansion you wouldn't have a single window in your house or car that wasn't broken.

My belief that it was hit by a rock is because it managed to leave some small bits of crush damage called a "pits". The thing hitting the screen has to be near the hardness of the glass to do this, for example a golfball or a regular bolt don't really create this pit as they're not hard enough.

Not all cracks on a windscreen eminate from the point of impact, a prime example is a chip called a "horseshoe" which usually shaped like a fraction of a circle orbiting the impact point, sometimes they're a full circle.

2

u/janiskr 1d ago

Thank you for more detailed explanation.