I'm having a workshop built (20'x24'). I want to insulate it with kraft-faced insulation batts. First, do I even need to cover that with anything? (I have read the insulation value will be poor without something over the top of it.)
Second, if I do have to cover it, can I just hang drywall without taping/mudding the joints? Other than "appearances", is there any reason that would be bad? Please note I DON'T CARE about appearances. The shop will soon be a mess anyway, due to the nature of my work. Also, I won't be doing any welding or anything with fire or heat (other than having a little electric heater in there).
So, bearing in mind that price is definitely a factor...can I just put up the drywall and forgeddabouddit?