OK so walls and attic/ceiling is fully insulated. Today I installed some 6 mil black poly sheeting to seal up the attic vent which is just a gap in the middle of the roof with some mesh netting to keep out the critters and to keep down summer temps.
Hey S1ing.I do not know about sealed grow room's.I do know a little about building house's tho.The ridge vent allow's the building to breath and it will sweat if there is not proper ventilation,but I believe you are running a controlled area so you should have no problem tweaking it just the way you want it.