What do you use for humidity control? Is it above or below grade?

However Dan is raining on my parade by talking in Latin about air flow crap!

When you are smoking and keep the lid closed and closing the vents, it is preventing airflow, all the moisture becomes trapped in your metal box. Give it some air, and some of the moisture can escape. Same principal.

Do you want your guns moist?

I don't mean to rain on your parade too, but how mobile will this be? Is it now part of the house? How hard to disassemble and return the room to normal if you were moving?

I know you guys mean to be in the house a long time but life happens sometimes. I don't know how much money (or headache) you'll save trying to build one instead of just throwing down a little more on a large safe that can come with you.

Yes, you can do a mesh ceiling, as basically it's just really beefed up chicken wire. You want to think about your fire resistance when it comes to venting. That's why a jumper vent that goes into a conditioned space is nice.

If you have forced air, look at putting in a small supply line. Then, with the jumper vent you will keep equal pressure in the room and perform actual air changes which will decrease humidity and stagnation. I'll draw something up later today when I am on CAD and maybe give you a better visual.

Ok, here is what I have.

The first image shows the wall (and ceiling) construction.



Then, we have the Jumper Vent. All it is, is a floor vent on the wall and a small duct connecting it to another vent on the other side of the wall. Allows air to flow to and from the space, yet small enough to keep people from using it as a break-in point. When you heat the room (with forced air), it will pressurize the room, pushing all the old air out of that vent, then as the air cools, it will pull back in the air from the other side, basically helping to perform an air exchange. If you choose to run a baseboard in there, that's fine too, it will still seep back and forth, but if you don't plan on going in the room for a couple of days, it wouldn't hurt to run a fan in there as well.

I admire your design skillz

I had no intention of being able to take it with me. Essentially its a big empty spot in my master closet that the previous owners had a sauna in. I figired if done well, shouldn't be an issue come selling time.

Dan, I'm not againt wire mesh, I was just hoping for good fire protection, and kaybe more than jist smash and grab protection. As stated before, I'm on a slab. So would I be able to do a mesh ceiling, for air flow? I guess I'm having a hard time understanding the problem if a guy just kept some sort of heat source and/or dissicant in there.

I forgot the most important part. Design updated below.