I have a large room in my house that is built over a crawl space. The floor of this room does not have any insulation installed in it. I live in upstate New York so it is my understanding that I should install a vapor barrier on the interior side of the insulation (the warm side). It seems like it would be very difficult to get the vapor barrier up against the floor from below.
Should I skip the vapor barrier? Or is there some other method I could use for this kind of retrofit?