Another insulating ceiling under room thread

[GreenScrew]

I have a detached garage that I'm finishing the ceiling and walls on. Its an acquired property, and the previous owner has craft-faced fiberglass insulation already installed - I just want to make sure this is proper before I install 5/8" fire rated sheetrock. The vapor barrier is on the underside of the insulation - stapled to the bottom of the joists.

The upper level is a seldom-used bunkhouse accessible via stairs on the outside of the building. Several times per year I'll have guests staying there so it may be heated or cooled (though its used more in winter). The heat systems are separate/stand-alone; just a gas fireplace in the upper level and a ceiling heater in the garage. The garage is not constantly heated, but is heated more frequently (typically on weekends). Location is northern Wisconsin where it gets very cold.

I envision that I'll eventually attach the garage with a breezeway and may possibly keep it heated to at least 45 degrees in the winter to keep vehicles thawed. Which also means a fair amount of moisture introduced in to the garage space.

All said, my question is whether the insulation is OK from a code/vapor barrier perspective and I can go ahead and have sheetrock installed without further cost? I've read a number of threads on this but still not clear to me.

Thanks for any help/suggestions!

 

[csp]

The kraft paper side of the insulation should face the room that has conditioned air (heated/cooled) in it. Sounds like yours is on the side that isn't conditioned.

 

[GreenScrew]

Well, to some extent both rooms are conditioned, but the lower level (garage) is the room that is conditioned most often. And is the room in which the kraft paper faces. Currently and in the future, the upper level will only be used on the rare occasion for guest overflow sleeping quarters (there is no running water). The lower level is far more often conditioned.

Having said that, I know its a bit of an odd situation given that none of the spaces are permanently conditioned, but would the right/ideal scenario be to not insulate between the two levels? I guess it would take more to heat the lower level, as I'd be heating the upper level from below, but would this be the correct configuration from a moisture barrier standpoint? Or just would insulation without having any moisture barrier at all be most proper?

 

[BadgerBoilerMN]

I wouldn't worry. Both are conditioned so vapor migration will not be an issue. Sheetrock away.