Step 1: Materials
23 rolls of R19 insulation
7 boxes of 100 insulation supports
Something to cut with. I had bread knifes, utility blades and bare hands.
light - headlamp, flashlight and work light.
Wire cutters, I used bicycle cable cutter to trim the supports where the bays were not 16" on center.
Step 2: Drag the insulation under the house
Step 3: Stuff rolls between joists
To install the supports just push up them up between the joists. The ends of the supports will dig into the wood and bow upwards into the insulation. Be sure not to compress the insulation too much, this will decrease its R-value.
To see how far apart to put the supports, I just held up a support lengthwise from the previous support since each support is about 16."