I used R20 insulation for the floor, as well as R10 up the sides to keep the walls from creating a thermal bridge and sucking out heat from electric floor heating. The insulation has a high compression rating at 40 PSI.
Tricks for leveling the floor for insulation. Learned this doing pavers for my sister.
Preparing floor for insulation. R-20 Planned.
Insulation ready to be placed.
Decided to add an extra drain for the master bedroom. Possibly a shower.
Installing 10 mm plastic Vapour Barrier for floor. This is the only place I trust plastic in a house.