I have these flimsy glass doors trimmed in gold on my stone/wood fireplace, likely built some time in the 50's and the glass/trim looks like it was added some time during the 80s. The glass is thin and the metal that the doors ride on is pretty flimsy. We never close the doors except to get a fire started. There are times when we have to leave to go somewhere, and let the fire burn down to coals, and while I have the screen system that is on this door system and another portable rigid frame screen that we place in front, Im wondering if the doors were meant for people like us that may need to go somewhere and want the peace of mind of closing those glass doors to ensure no embers make it through those two layers of defense.