We have a floor!

We prepped the floor (leveled and compacted soil, then put down vapour barrier, then dense rigid foam insulation, also chipped off some cement from the cement footers we had done years ago, because you don't want to have sharp 90 degree angles where cement touches cement since it needs something to grab onto), dug the greywater trench in the front hallway (which is 2 ft wide and something like 14" deep on the greywater input side, about 3 ft deep and 3 ft wide on the reservoir side (the water in the reservoir gets used as input for the toilet when it gets flushed), and it's all sloped so the greywater flows from the input side to the reservoir side by way of gravity. Then the professional cement crew came and framed the greywater trench, poured a first round of cement, made a rebar grid on the floor for the big pour, poured the cement for the big concrete slab, levelled it, and polished it off with some big fan blade looking thing, that a guy pushes across the floor when it's partially set. We waited almost a week to start moving in some of the lighter items.