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Car windshields are pretty amazing tech for how simple it it

Posted on 6/6/25 at 10:59 am
Posted by udtiger
Over your left shoulder
Member since Nov 2006
108406 posts
Posted on 6/6/25 at 10:59 am
Going down interstate the other day at 80 and I can see the rock coming (obviously kicked up from the road surface as there was no gravel hauler to be found), probably the size of a small egg, and it nails the upper driver's corner of my windshield. Loud "whack" and double starred out immediately with at least a half-dollar diameter for both.

Checked out the surface when I got home and there's a nice gouge in the glass, but I could only imagine what it was like before modern windshields. Likely would have busted it and I would have been showered with broken glass at 80 MPH, if not being hit by the projectile itself.
This post was edited on 6/6/25 at 11:01 am
Posted by fr33manator
Baton Rouge
Member since Oct 2010
130712 posts
Posted on 6/6/25 at 11:01 am to
Think of how many rocks and things get thrown on the highway.


Then think about being impaled by shards of glass
Posted by ThatBaw
Baton Rouge
Member since Jul 2023
330 posts
Posted on 6/6/25 at 11:08 am to
If you have sensors in your windshield you might prefer the shards of glass once you check your bill
Posted by lsu xman
Member since Oct 2006
16441 posts
Posted on 6/6/25 at 11:10 am to
Might want to get it sealed.
Posted by hawgfaninc
https://youtu.be/torc9P4-k5A
Member since Nov 2011
49751 posts
Posted on 6/6/25 at 11:11 am to
And more vehicles every year are putting sensors in their windshields
Posted by Skippy1013
Lafayette, La
Member since Oct 2017
704 posts
Posted on 6/6/25 at 11:11 am to
They can make windshields that will not break at all for just a small price increase, but they don’t want to. Gotta keep those glass/windshield companies in business.
Posted by TD422
Destrehan, LA
Member since Jun 2019
705 posts
Posted on 6/6/25 at 11:35 am to
Safelite quoted me $300 for the windshield…reasonable. Then followed up with $500 for the system recalibration. I think they got offended when I told them to pound sand.
Posted by LazloHollyfeld
Steam Tunnel at UNC-G
Member since Apr 2009
1916 posts
Posted on 6/6/25 at 11:38 am to
What is the ideal angle for windshield to best avoid/deflect impacts. I’ve have 4Runners and suburbans and tahoes and those windshields were always getting impacts on highways. Had an Accord for 8 years and don’t ever remember an impact requiring repair. There is some science and shite to this someone need to figure out.
Posted by Crow Pie
Neuro ICU - Tulane Med Center
Member since Feb 2010
26409 posts
Posted on 6/6/25 at 11:40 am to
quote:

Safelite quoted me $300 for the windshield…reasonable. Then followed up with $500 for the system recalibration. I think they got offended when I told them to pound sand.
fwiw - The 3rd time I replaced the windshield on my wife's car I found a dude that would replace the glass w/o calibration. He said if they don't need calibration, if you don't unplug or move the sensor. I let him do it, and it works just fine. Paying $800-900 for a window gets old fast.
Posted by LemmyLives
Texas
Member since Mar 2019
10438 posts
Posted on 6/6/25 at 11:47 am to
quote:

Then followed up with $500


That's why you spend $130 to get it sealed the day you get the crack, so you don't have to replace the windshield.
Posted by chRxis
None of your fricking business
Member since Feb 2008
25748 posts
Posted on 6/6/25 at 11:57 am to
quote:

I found a dude that would replace the glass w/o calibration.

where? contact info?
Posted by SG_Geaux
Beautiful St George, LA
Member since Aug 2004
79617 posts
Posted on 6/6/25 at 12:01 pm to
Laminated glass has been in cars for 100 years
Posted by TD422
Destrehan, LA
Member since Jun 2019
705 posts
Posted on 6/6/25 at 12:04 pm to
Funny…I DID have Safelite “repair” the star…it spread anyway. They were willing to credit the repair cost to the new windshield, but I was so pissed at the recalibration cost….

Posted by TheHarahanian
Actually not Harahan as of 6/2023
Member since May 2017
21722 posts
Posted on 6/6/25 at 12:19 pm to
quote:


If you have sensors in your windshield you might prefer the shards of glass once you check your bill

Cost to replace the windshield in a 2012 BMW was $900. I’m sure it’s increased.
Posted by Napoleon
Kenna
Member since Dec 2007
71033 posts
Posted on 6/6/25 at 12:20 pm to
I seem to have to buy one every few years due to chips. I Just got hit by a huge rock and have a deep gash with 3" cracks coming from it on passenger side. Still ill let it rock until i need a new brake tag.
Posted by achenator
Member since Oct 2014
3165 posts
Posted on 6/6/25 at 12:36 pm to
quote:

Then think about being impaled by shards of glass


Amazing to think that they are also a structural part of the car.
Posted by LazloHollyfeld
Steam Tunnel at UNC-G
Member since Apr 2009
1916 posts
Posted on 6/6/25 at 12:36 pm to
I didn’t get a new tag for 5 years bc of cracks and runs on the windshield - traded the vehicle in and got a new one rather than change the windshield. frick those windshield prices (vehicle needed to go anyway).
Posted by glassart
Member since Apr 2021
584 posts
Posted on 6/6/25 at 12:58 pm to
The tech behind your windshield is not simple at all and is in fact a very concrete example of American greatness.

Try manufacturing ANYTHING to the exact dimensions and curves of a windshield. It’s difficult. Then get the glass formula just right for the maximum resistance to scratches. The glass itself has a softer core than the exterior which is achieved through a very specific timed heating process.

Posted by rexorotten
Missouri
Member since Oct 2013
4627 posts
Posted on 6/6/25 at 1:15 pm to
Posted by ThatBaw
Baton Rouge
Member since Jul 2023
330 posts
Posted on 6/6/25 at 1:16 pm to
I'd do them myself with the RainX kit if it's small enough. If they spread after that then replace but it'll do for like $15
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