then.
Not sure how much temperature variation the car's going to get in the garage.
Even outside going from overnight cold to day time hot and back again it took a long time for the crack to grow in my Boxster's windshield. And the replacement glass even with several nasty (but small) rock chips has not developed a crack. Same with the 996.
Yes, the dealer almost certainly farms this out. This can be good news, as the installer has lots of experience.
When it was time to replace the glass in my Boxster, I learned that letting insurance handle the replacement cost me my deductible -- $500 -- but required this work be done by someone under contract to the insurance company. Safelite Auto Glass was the glass installer. For an alternative, I priced this at some dealers. $1300 was the quote. (And my investigation was the majority of dealers would just let their regular glass guy do this. While I was worried about having some indy installer do this the prospect of paying another $800 on top of my deductible was also a concern.
I settled on letting the guy selected by the insurance company do the job. I figured if the repair was subpar I'd have some leverage since I had used the company selected by the insurance company.
The installation went ok. The guy had lots of experience. The insurance company adjuster said he'd direct Safelite to send their bust guy. He was pretty good. I checked on the progress every so often and every time I checked the installer was on his cell phone while working on the car with the free hand.
Before he started the process we checked the new glass. Factory as near as we could tell, and we went over every decal or other marking on the original glass and the new glass.
Anyhow, the installation went well and the glass has been trouble free now for more than a few years. It is pitted nearly as bad as the original glass but it has held up well.