I need to update (replace) the insulation in my crawl space under my house. The crawlspace is maybe 20 inches tall, with solid ground as a bottom. Currently, the insulation is some type of craft paper, lined with what appears to be aluminum foil, stapled to the under-sides of the joists. It is original to the house, built in 1965, and in very many places it has been ripped down or has crumpled. There had also been a plastic sheet laid down on top of the ground, which I need to think about replacing. My questions are:
1. What type of insulation?
2. If I use fiberglass, do I use craft-faced or not? And if so, does the paper go up against the subfloor, or down?
3. I'm worried about moisture in the ground. Do I staple a moisture barrier to the bottom of the joists once the insulation is up?
Any input would be greatly appreciated!!!