The walls are all original wood and plaster. It took a master craftsman a lot of time to put in these walls and ceilings. I feel a little bad about just ripping them out in a few hours. Some are in good condition and we may leave a few. Others have so much damage or we have to remove the walls to put in insulation, modern plumbing, electricity, etc.
The biggest problem is the mess from the plaster and all the centuries old dust, mold, rot and other nasty contaminants. As you can see in the last photo, I'm wearing full-body protection, especially a high quality air filter.