I am undecided on what to do with my Airlock on the front of my 1932 house. It is not heated so in the winter the door to the living room is always shut. The walls are lath and plaster but a pervious ower did something and it is coming off in sheets. I was told by several drywall guys that the extreme temp changes will do that. I was going to do a batten board in there and now am thinking of maybe doing one wall in antique mirror tile. Any thoughts?