TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker and becoming a Supporting Member. For more info: Support TMC

Glass Roof Question

Discussion in 'Model S' started by Italia81, May 29, 2017.

  1. Italia81

    Italia81 Member

    Joined:
    May 29, 2017
    Messages:
    43
    Location:
    USA
    I want to get a new 75D but I don't like the all glass roof. It's hot as hell where I live and the glass creates a greenhouse effect.

    Anyone here with the all glass roof that lives in very sunny/hot weather and finding it to still be ok? I'm just wondering what it's like to live with for a long period of time.
     
  2. croman

    croman Active Member

    Joined:
    Nov 21, 2016
    Messages:
    1,270
    Location:
    Chicago, IL
    The roof is not an issue with heat. The issue is the other windows that aren't tinted, especially rear hatch window and windshield.
     
    • Like x 3
  3. ucmndd

    ucmndd Member

    Joined:
    Mar 10, 2016
    Messages:
    370
    Location:
    California
    I live in the CA Central Valley, we are regularly well over 100f for extended periods throughout the summer. Granted I took delivery in December and we've only had a few toasty days so far, but I don't foresee any heat or comfort issues with the glass roof at this point. Car is going in next week to get the rest of the windows tinted.
     
  4. Italia81

    Italia81 Member

    Joined:
    May 29, 2017
    Messages:
    43
    Location:
    USA
    Ok, thanks. I personally like it but my wife is super paranoid about UV rays etc. We test drove at noon on a 100 degree day with the sun right above and I still felt the rays...very slightly though.

    They have a few new 75Ds with solid roofs...but they are super rare and I would have to pay extra to ship it in.
     
  5. tpham07

    tpham07 Member

    Joined:
    Mar 21, 2017
    Messages:
    459
    Location:
    Baton Rouge
    The glass roof is heavily tinted, there is no UV going thru. You're going to get a lot more UV going thru the front windshield and your untinted side windows. During the test drive, you probably felt what came thru the windshield and side windows.

    i have the glass roof and live in louisiana. I dont feel a difference driving this car vs a solid roof car. And with the ability to precool your car from your phone and cabin overheatprotection, your car is not going to be any hotter/cooler than it would've with a solid roof.
     
    • Like x 3
    • Helpful x 1
    • Informative x 1
  6. Italia81

    Italia81 Member

    Joined:
    May 29, 2017
    Messages:
    43
    Location:
    USA
     
  7. EV-lutioin

    EV-lutioin Active Member

    Joined:
    Apr 2, 2016
    Messages:
    1,052
    Location:
    California
    The Model X is almost all glass and I live in Sacramento Valley, CA, where it is super hot and sunny and it is by far the coolest car I have ever owned. Every other car I have owned have been solar ovens, but MX with it's glass top is nice and cool. You will be fine. Actually, I think the glass roofs are more of an issue in cold climates, due to lack of insulation.
     
    • Like x 1
  8. Italia81

    Italia81 Member

    Joined:
    May 29, 2017
    Messages:
    43
    Location:
    USA
    Thanks, good info here, I don't think I'll be paying extra and taking more time to get the solid roof, which seems like a less desirable option...doh.
     
  9. K-MTG

    K-MTG Sunshade Captain of TMC

    Joined:
    Oct 24, 2015
    Messages:
    3,497
    Location:
    Irvine, CA
    Any sunshades available for the glass roof? I am sure heat shield has a solution??

     
  10. croman

    croman Active Member

    Joined:
    Nov 21, 2016
    Messages:
    1,270
    Location:
    Chicago, IL
    Soon. None yet.

    Also glass is an excellent insulator. In Chicago had no issues in winter. Feet were far colder. Delta window is very drafty.
     
  11. SageBrush

    SageBrush Active Member

    Joined:
    May 7, 2015
    Messages:
    3,701
    Location:
    Colorado
    UV or heat ?

    Car glass has blocked 99% of UV for years now, IIRC
    Tesla blocks some 90% of IR (heat) from the glass roof if memory serves
     
  12. Italia81

    Italia81 Member

    Joined:
    May 29, 2017
    Messages:
    43
    Location:
    USA
    UV, I see outside sources saying 98%/99% but can't find anything directly from Tesla.
     
  13. croman

    croman Active Member

    Joined:
    Nov 21, 2016
    Messages:
    1,270
    Location:
    Chicago, IL
    Ask your OA. If they can't get that for you ask for an OA who can.
     
  14. houstonian

    houstonian ಠ_ಠ

    Joined:
    Sep 2, 2013
    Messages:
    65
    Location:
    Houston. Duh.
    It's hot, humid, and sunny here. Roof strikes me as rejecting a material amount of heat (~90%?) when driving in direct sunlight. No issues here with that.

    Annoying - to me at least - part of the roof is when the sun directly hits your eyes when driving through the roof. Does not haapen too often, but does happen enough for me to notice. When it does happen I put on a hat and it solves the problem. There might also be an aftermakret sunshade as well you can attach to the inside of the roof...seem to recall one for pano-roofs.

    Bottom line is the glass pros outweighed the cons for me. Would opt for it again if reordering.
     
    • Like x 1
  15. OilSucks

    OilSucks Member

    Joined:
    May 29, 2017
    Messages:
    33
    Location:
    Northern California
    I have to disagree. I test drove a Blue Model S 75D with a glass roof in Walnut Creek last week when it was 101 degrees and the car was perfectly fine. I couldn't feel a difference at all.
     
    • Like x 1
  16. Topher

    Topher Energy Curmudgeon

    Joined:
    Apr 7, 2016
    Messages:
    1,254
    Location:
    Maine
    No it's not. It is a terrible (heat) insulator (it is an electrical insulator). About R-1 per inch. If Tesla has done something to make the window well insulated, it isn't the glass.

    Thank you kindly
     
    • Like x 1
  17. SageBrush

    SageBrush Active Member

    Joined:
    May 7, 2015
    Messages:
    3,701
    Location:
    Colorado
    UV is not a problem for any car.

    Just be aware that UV is not heat
     
  18. Italia81

    Italia81 Member

    Joined:
    May 29, 2017
    Messages:
    43
    Location:
    USA
    Yup, UV is a much bigger concern than heat.
     
  19. croman

    croman Active Member

    Joined:
    Nov 21, 2016
    Messages:
    1,270
    Location:
    Chicago, IL
    I'm mistaken but I think the point is that the glass doesn't cool the car as much as failed window sealing or whatever causes the footwell to remain cold.
     
  20. Topher

    Topher Energy Curmudgeon

    Joined:
    Apr 7, 2016
    Messages:
    1,254
    Location:
    Maine
    I'd be happy to run that calculation for you, if you provide me with the thermal specs for the car.

    In the meantime, all my post above addresses is the insulation value of glass.

    Thank you kindly.
     

Share This Page