VC Studio Inc. I'm new to this site or I would have answered this 6 months ago:) Since that bathtub looks to be concrete then this floor is probably a concrete slab on grade. If you have an existing wood framed floor (not a concrete slab) you can still get a concrete floor. There are many options for SLUs (self leveling underlayments). The pricier ones can be a wear layer and can go down as thin as 1/4". Less expensive options need at least 3/4" minimum. These would also need to be covered with a micro topping to provide a wear layer. The micro topping is a thin layer of concrete (avg 1/16" - 1/8") that can have the texture of a smooth hard troweled slab to heavy slate. Micro toppings can receive the same acid or water based stains and dyes that a slab would take. Since many manufacturers offer a white base, the color options are almost limitless.

motherbear Custom cast concrete, I woulld think.