I have a basement with 7 feet of unfinished clearance, floor to joist. The basement floor and walls are poured with no subslab insulation. The current plan for the floor is to put down a layer of poly, followed by 1 inch of XPS and then 1/2 or 3/4 plywood. The plywood will then be painted or otherwise finished. I’ll finish the ceiling using flush-mounted wood or drywall panels between joists. This is all assuming I can get a 2-inch variance on the headroom (i.e., can get away with a 6’10” finished ceiling). Increasing the unfinished headroom is not in the budget.

I live in coastal Connecticut (zone 5, i think). No real water management system on the 1970 house, but the soil is very sandy and drains well. I haven’t had any serious basement moisture problems, and no water incursion problems.

Is this a viable plan? Is there anything i’m missing?

Thanks in advance!