Are there any plans or instructions for properly building a non-combustable wall that is spaced 1" out from the combustable wall? We have a corner and it currently has paneling and wallpaper back there. Underneath should be plaster on lathe. What I'd like to do is remove the paneling (there is a door on either side of the corner, so a good stopping place and put up the 1"spaced wall. I was thinking cement board with sheet metal over it, possibly tine ceiling material, so it looks nice. Or I could use tile. I'm assuming there needs to be a space at the bottom and the top for the air to circulate, but can be the sides be enclosed? The thimble goes through the ceiling, so I don't need to worry about that. What is used for the spacers? Any other details? Any pics of well done installs? Thanks!