Exploding shower glass: Why is this happening?

Julie Davies experienced an unexpected shattering of her shower glass, leaving her puzzled. Glass consultant Mark Meschelom explains that tempered glass, often used in shower doors, can break due to impurities or improper installation. He suggests following installation manuals closely to prevent such incidents. Julie's glass panel is covered by warranty, but labor costs are not. The manufacturer is investigating further. Julie is relieved no one was injured, and the segment concludes with a reminder to be cautious with glass installations.

What did Julie's installer say about the warranty for the glass panel?

What was Julie thankful for after the incident?