Can I put stained glass in a bathroom or kitchen?

Kitchens are generally fine, but bathrooms are where you want to be careful. Lead deteriorates more quickly in high-moisture environments. Over time, it can crack and become brittle, and the window might not last as long as it would in a drier room. You want to make sure whatever room you're installing in has good airflow and circulation. I've seen bathroom stained glass windows in older homes, we're talking a hundred years old, where the lead has completely deteriorated. But that's a slow burn. It's not happening overnight. If you're planning to stay in the home long-term and want the window to hold up, just know that a bathroom installation comes with some added risk around the lead's longevity.