Great question, I will be following your thread. I have an unfinished 16 x24 room on concrete slab floor next to my garage that I wanted to reinforce for storage, including gun safes and storage food & supplies.
It will be heated and air conditioned but currently has conventional exterior walls.
Since I am DIY, as a minimum I was going to skin the walls and ceiling with screwed-in 3/4 plywood. The Ceiling joices will need to be added to-- spaced closer & larger to carry the ceiling weight. Also replace door and door frame along with bars on the windows.
But , if you have the money, this is a possible idea to consider for finishing a basement:
Last edited by Ready.Fire.Aim; 01-20-13 at 08:25.
"Jill, if there's ever a problem, just walk out on the balcony ... take that double-barrel shotgun and fire two blasts outside the house,.." VP Joe Biden Feb 19, 2013