So we've been in our "forever" home for about 3 years now. I think I need to address the 3' crawl space this house has. The insulation is sagging and pretty much destroyed. Would installing a 10+ mil plastic sheeting on the dirt and re-insulating the flooring be the correct path to take? Live in South Carolina, 30 degrees - 100 degrees mostly. Great drainage around the house as we installed a French drain a year ago but still damp under house to a degree. I refrain from insulation due to the moisture. Any thoughts greatly appreciated, not my area of expertise. -Shane