Hi all looking for advice/insight into a conversion project I'm looking at. When I moved into my place a few years ago the previous owners had finished the cold room, dry wall, raised hardwood floors, lighting etc. my wife claimed it as a darkroom/photo lab, but has never used it. My gun collection is growing and I've decided use it or lose it! I was wondering what legal merits a gun safe has to have to be legal? I'm assuming foot thick concrete walls suffice and obviously a type of indoor security door. I'm assuming the ceiling is simply drywall, would I have to reinforce this? And what about temp/humidity control? Is this even legal? Any insight/advice is appreciated. Thanks in advance.