Would this be a good idea?

[64auto]

Getting ready to do my insulation. My garage is going to have a upstairs that may be turned into an apartment later on. Would it be a good idea to insulate the upstairs floor and the ceiling, or will this cause a moisture problem.

 

[russlaferrera]

I did. It cut down the noise from the shop to upstairs. I used blow in/ pour, but you could use unfaced as there is no vapor barrier for the floor. Regular insulation for the ceiling.

 

[PAToyota]

I've done just that between my garage (downstairs) and woodshop (upstairs). Basically, you want the vapor barrier (paper side) of the insulation on the warm side of the equation. For me, that meant that it is facing the upstairs woodshop.

 

[strnge]

Insulate!!!!!!!!

 

[Stuart in MN]

Remember that if the upstairs is going to be living space, there needs to be a fire barrier between it and the garage area. The specifics will depend on local codes in your area but generally it means 5/8" sheetrock with all seams taped and covered with joint compound, and any openings between the two areas (like a staircase) will need a fire rated door.