Moisture resistant walls?

[FatBeagle]

I am in the process of building a gun bluing business in my garage. I recently completed the framing and exterior walls of an enclosed room in one corner. The exterior is OSB and I plan to hang fire rated sheet rock on the inside. There will be decent ventilation and a hood system over the tanks, but the environment will be very moist while the tanks are running.

What should I cover the drywall with? I would like a cleanable surface ideally and something fire resistant.

Any suggestions are greatly appreciated.

 

[buildyourown]

Is the drywall already up? I have had very good results with DensArmor in wet environments. Its drywall reinforced with fiberglass and then impregnated with silicon. It's waterproof. If you use fiberglass tape and setting mud, it's really waterproof.
It's 2x the weight and 2x the price, but worth it for some installs.

 

[icsamerica]

Don't use drywall. Use hardy board. You can "tape" the seams with thinset and mesh tape and finish with exterior paint... sanded if you like or tile it.

 

[Chris705]

Marlite makes a FRP in a class A fire resistant version, available from commercial building supply houses.

http://www.marlite.com/finishes-standard-frp.aspx

 

[FatBeagle]

Fire rated drywall may be necessary for insurance reasons, but I'm not sure yet. I want to avoid putting something up and then some bean counter says I have to re-do it.

 

[Kaizen]

the insurer might want fire rated wall which most of the stuff above is I believe. I'd be concerned putting drywall up in a wet environment like you are talking will get a lot of mold quickly. if you have to have the drywall I'd go with sheets of laminate like you use on your countertop. lots of more expensive options out there.

 

[kbs2244]

Hook you hood up to a humidastat.
It will take the guesswork out it.
If you have trpuble finding one go to the local resale shop for a dehumidifier.
That is how they turn on and off.

 

[theoldwizard1]

"Fire rated" is not specific enough. Even standard sheet rock has a limited "fire rating". In most residential applications, 2 - 1/2" sheets, that have staggered seams, are adequate for several hours of fire resistance.

 

[TractorJeff]

If you are like the local gunsmith, you will "Blue" once a month! It keeps your material costs down. He doesn't have an issue with humidity using this logic.

oops1
See you said "Bluing Business" not Gunsmith who Blues!