Ceiling insulation

[oldgoat]

I have a 22 x 26 garage that I will be insulating and sheetrocking. I am using a vent free heater in it, but it won't be heated unless I am planning on working out there so it can be several days that it will remain unheated. So should I put up insulation with or without vapor barrier? I am puting up OSB panels in the ceiling so that the eve vents will remain open and get circulation to the attic area and it has 2 roof vents in it.

 

[RAMBIN]

vapour barrier is cheap and it keeps moisture out of your insulation, especially if your going to be heating ond day then not the next ur creating moisture..i would just put up the vapour barrier..