Hi Dick & Winterh,
Thanks for a careful and informed responses! It sounds as if Dick is suggesting some sort of air "tight" skirting, with 2" foam on the "dirt floor" and "walls", covering the lot w/ 10mil poly and gravel on the floor, over the poly and foam board.
Winter H seems to be along the same lines - basically encapsulating the crawl space area.
Do I have that right?
You'd mentioned the borate treated cellulose sprayed up option. Since the floors will be redone - could I just spray that down? I guess the joists will still be cold 'bridges' in that case.
https://www.homeadvisor.com/cost/ins...in-insulation/
Chris