Insulation is awesome. Crawlspaces are not. The cramped area between the floor and the dirt below is populated with detritus from all kinds of earlier renovation projects: circles of plywood from holes cut in the subfloor, leftover wires from bygone electrical installations, and even an aluminum ventilation shaft, the origin of which I cannot begin to guess.
Once you're under there, all that's left to do is to scrub away all of the spider egg sacs and cobwebs, kill anything that's still moving around, stuff the 15" insulation in between the floor joists (this works for 16" on-center spacing), and then you press these little wires into place. The wires have spikey ends, helping them grab the wood of the joists and bow up into the insulation batts.
It was an eight-hour day under the house that Saturday, and I managed to cover the two bedrooms. Maybe this week I'll be able to get the rest of the floor insulated.
Psalms 95:4 - In his hand [are] the deep places of the earth: the strength of the hills [is] his also.
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