If this is the case, R-25 batt insulation in the right width will fit snuggly between the joists. Place the craft paper face against the bottom of the subfloor, as it acts as a vapor retarder.

So, fool that I am, I continued reading. Greg first makes the case that batt insulation has merits that we overlook. Lets make this absolutely clear: There is Nothing wrong with insulation in the ...