# Glass, Glass, Glass **URL:** \ **Category:** Factual Questions\ **Created:** [June 29, 2002, 4:43am UTC](https://boards.straightdope.com/t/glass-glass-glass/116538 "2002-06-29T04:43:40Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![neisha](https://avatars.discourse-cdn.com/v4/letter/n/4bbf92/32.png) [@neisha](https://boards.straightdope.com/u/neisha)\ **Post date:** [June 29, 2002, 4:43am UTC](https://boards.straightdope.com/t/glass-glass-glass/116538/1 "2002-06-29T04:43:40Z")
The glass in my oven door broke and needs to be replaced. Problem is, no one seems to know what kind of glass it is I need. One shop said “tempered”, another shop said, “Pyrex”, someone else said “get a new oven”. Any thoughts… ---
**Author:** ![Reeder](https://avatars.discourse-cdn.com/v4/letter/r/c6cbf5/32.png) [@Reeder](https://boards.straightdope.com/u/Reeder)\ **Post date:** [June 29, 2002, 4:57am UTC](https://boards.straightdope.com/t/glass-glass-glass/116538/2 "2002-06-29T04:57:41Z")
Just go to a used appliance store or any place that repais ovens and replace the door. You might need to look a bit to match the color. ---
**Author:** ![Wikkit](https://avatars.discourse-cdn.com/v4/letter/w/c0e974/32.png) [@Wikkit](https://boards.straightdope.com/u/Wikkit)\ **Post date:** [June 29, 2002, 7:26am UTC](https://boards.straightdope.com/t/glass-glass-glass/116538/3 "2002-06-29T07:26:15Z")
It’s probably borsilicate glass, of which a common brand is Pyrex. Borosilicate has a low coefficient of expansion (COE) which just means that when you heat it unevenly, it doesn’t expand and shatter. Other than that tidbit, I think Reeder has the right idea. ---
**Author:** ![Mr.Moto](https://avatars.discourse-cdn.com/v4/letter/m/9de0a6/32.png) [@Mr.Moto](https://boards.straightdope.com/u/Mr.Moto)\ **Post date:** [June 29, 2002, 1:00pm UTC](https://boards.straightdope.com/t/glass-glass-glass/116538/4 "2002-06-29T13:00:56Z")
Depending on the age of the oven, check your local junkyard.