I want to install infloor heating so i was gonna insulate and vapor seal the main floor joists then. The walls and floor are a mix of concrete, bedrock, and cinderblocks. I’d have to install joists and insulate to vapor barrier it effectively. One of the trenches also cut diagonally to a drain line halfway along the crawlspace. I think the house started with about 1/3 of the the footprint crawlspace then was expanded later but I’m not really sure.