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Glass Roof Design (What's it made of?)

Discussion in 'Design' started by Kizzy, Oct 12, 2017 at 12:50 PM.

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  1. Kizzy

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    After reading this Consumer Report article about exploding panoramic roofs, I began wondering about the composition of the glass roof on the Model 3.

    I know safety is a concern for Tesla, but is this something the roof was designed to avoid? Has there been any history of exploding Tesla glass roofs in the past?
     
  2. Brokedoc

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    I was just about to write a new threat on the exploding glass roof article also. The article suggests that larger pieces of glass are more susceptible to explosion. There was also a mention of some special coatings that may increase risk of explosion as well.

    An internet search didn't reveal any major report of Tesla exploding glass despite the pano roof on the S and the huge windshield on the X. Tesla owners tend to me more vocal and seem to be more likely to be forum participants so no reports of this happening to past Teslas is a good thing. The only thread I could find pertaining to Tesla's glass was reassuring Link Here

    Hopefully, the Model 3 will continue this safety record.
     
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    • SoFlaModel3

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      Comforting to know I currently drive a Hyundai and they have the most reports. That said 119 reports in 22 years doesn’t seem like cause for concern.
       
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      • Frank99

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        There's a lot of ways to make glass. Think of cellphones - just a few short years ago, it was common to see people with shattered screens (at a high school, I'd swear it was 75%). With the advent of Gorilla Glass, it's become far less common as the toughening processes.

        With the size of glass roofs on Tesla vehicles, I've got to assume they did their homework in creating tough, damage-resistant glass. At least, I hope so.
         
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        • JWardell

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          I think the key question is whether the roof glass is laminated (like a windshield). That prevents it from "exploding" all over the place. It's only required on the windshield so other manufacturers won't bother, but Tesla is not like anyone else.
           
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          • Kizzy

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            According to the thread @Brokedoc posted, the glass is laminated, which is quite reassuring.
             
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            • Kizzy

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              I just listened to Talking Tesla #103. At about the 1 hour 20 minute point in the show, they're reading a letter from someone who shattered their roof with a suction cup-based bike rack. Sounds like it didn't rain on the occupants, though.
               
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              • Michael Russo

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                Hence the value of a bike rack you put in the back... yet that requires a tow hitch... darn... :(
                 
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                • SoFlaModel3

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                  Well, I think if you use the mounting locations that Trev pointed out you wouldn’t also need a suction cup, right?
                   
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                  • MelindaV

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                    And my take on that specific bike rack issue was it was not the suction cups or their spacing that caused the glass to fracture, but the bike’s front wheel fork (without a wheel installed) came down and impacted the glass causing a point load impact.
                     
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