Even more [extruded] styrofoam - underslab insulation so the heat from the radiant floor heating goes up and not down into the earth. Over the poly vapor barrier.The tricky room before the work.
Poly in the south room.
Insulation going over the plastic.
Saturday: sun interspersed with gully-raker downpours.
Sunday: spring irises.
Plastic going down in the tricky center room.