Protective glazing for exterior-window art glass

[hiloguy]

I'm about to install several art-glass panels in a new home.  Two go in a bathroom and I am considering installing window glass into the openings and the stained-glass panels on the inside.  Anyone have any experience with how to seal -- or not to seal -- the panels?  I'm thinking of sealing the interior (stained glass_ panels to the stops to keep bathroom moisture out from between the panels, and allowing some venting on the outside (plain glass) panel.  Any ideas? I'd love to hear from anyone who has had experience with this kind of installation.

[Javahut]

tell me about what part of the country you are installing these.  What sort of climate?  Are themal windows the normal window in you area?  What did you alolow for when you started the project?

I am in a northern midwest area, thermal windows are most commonly used.  When such a thing is installed, I put my leaded panel in front of, but spaced away from the themal window, and I allow the leaded panel to fit loosely in the opening so there are gaps around the perimeter so the moist air can leave.  any molding I use is not caulked and not pressed tight. that way the dead airspace between the thermal and the leaded panel can draw room heat.  I have not had a problem with condensation yet..... so far....up to now.

I do not put a leaded panel against a thermal, and I don't caulk them.
Each project has different parameters for insallation. but this works for me.

[rpettyjohn]

You want to make sure the exterior glass is completely sealed.  Your interior panels should be kept apart by at least a half inch stop.  Make sure your stained glass panel is at least 1/8 inch smaller on all sides.  Shim up the bottom part of the panel with a rubber block to help let air flow around the panel so excess heat can vent out.  Do not seal the stained glass panel.  My recommendation is to always expect at some point the stained glass will need to come out for cleaning.  Dirt and dust do get back there over time.  Maybe recess fancy screws that compliment the looks of the finish.  At some point, may 1-30 years depending on exposure and environmental issues, they will need to be cleaned on the backside.