Hi - the family room in my house was an add-on from what looks like an old porch. When you go to the basement, you can look out a couple of windows and see the ground below the family room and the bottom of the floor.
The ground appears to have a clear piece of plastic covered with miscellaneous pieces of rock and other not so attractive debris. I'll assume that is supposed to be a vapor barrier and you want to have that in place?
My bigger question is, a bunch of the insulation under the family room is falling out. It is R19 from what I could see but I noticed that it is all pink -i.e., no paper side. Assuming this needs to be fixed, is R19 what should go there (or should I use a higher rating?) and should there be any "cover" over it, like plywood? If not, shouldn't I use a paper sided type and have the paper facing the ground?