How do I hang stain glass outdoors?

Hi Denise, this site has a whole bunch of tips for hanging stained glass outside - https://www.delphiglass.com/blog/how-to/protecting-stained-glass-from-the-elements

Hello this link might be helpful

https://craftingpal.com/stained-glass-hung-outside/

I would cover it with clear glass for protection, but leave a space for air to circulate.

If you used lead in your stained glass project, nothing else is needed to protect it, if you used copper foil, it will oxidize and will need protection.

To protect it, spray it with clear spray paint or used a water based polyurethane.

The leaded stained glass needs no protection even outdoors. It can sustain the external conditions efficiently. Stained glass with copper foils needs to be protected.

You probably heard many people say that the textured side of the stained glass should face outward. Sunlight refracts on the textured surface making the stained glass shine.

You can attach a plain piece of glass to this textured side of the stained glass. This ensures that your copper came stained glass is safe.

No you don't have to. You just hang it. Your windows are outside aren't they?

https://glassartstories.com/blogs/blog/how-to-hang-stained-glass-panels

It would break from the wind and cold

It should be fine as is if put in frame or Lead is secure.

Here's an answer from a stained glass artist (from a previous Hometalk question)

As a stained glass artist i say NO NO NO. Stained Glass has been around for "quite a long time" without being "varnished". The charm of stained glass is in the aging Yes it changes with age but don't we all. And if the piece ever gets broken it is almost impossible to repair if it has a coating of any kind. Even people who apply glue to a broken stained glass pieces causes problem when the repair person has to fight with that. Love your glass the way it is. Now having said that I have seen stained glass sandwiched between 2 pieces of plain glass and frame for protection in a heavily transit area. That I can bless.

Link: https://www.hometalk.com/diy/decorate/rooms/q-how-can-i-make-this-stained-glass-project-safe-for-outdoor-elements-28897618" rel="nofollow noopener" target="_blank"> https://www.hometalk.com/diy/decorate/rooms/q-how-can-i-make-this-stained-glass-project-safe-for-outdoor-elements-28897618" rel="nofollow noopener" target="_blank">https://www.hometalk.com/diy/decorate/rooms/q-how-can-i-make-this-stained-glass-project-safe-for-outdoor-elements-28897618