I am talking about the pink fiberglass insulation. My crawlspace has a concrete wall, and on top of that is the framing of the house. This framing is about 12 inches high till I get to the floor joice's. I want to insulate this section (the wood part). My question is this: if I was to buy a package of insulation, and lay the pieces end to end, how long would one package last, in feet? My crawlspace perimeter is 140 feet, and I want to know how many packages of insulation I need. I will fit the insulation between the studs, and staple plastic over it.