Sorry for not getting back to you. It's mainly because I don't have a conclusive answer. I've looked through my paperwork and all over the trailer and cannot find where they are labeled thermal pane or not. Just frameless.
Sorry for not helping much.
2014 Eagle 34.5 BHTS FW
2016 Ram 2500 Laramie 4x4 Megacab
4.10 Rearend, bed cam, air suspension