The preferred practice is that the bathroom flange is at the top of the finished floor, if the floor is made of wood, vinyl, tiles or what matters. It is so that the weight of the bathroom, and of the occupant, is supported by the floor and not by the pipes.

If you install a new floor, a pedestal sink and a bathroom, you have to install the raw laminated floor to do so under the sink and the bathroom. As laminated floors float in the basement above the basement, expand and contract slightly with room temperature and humidity.

If you are installing a new floor, a pedestal sink and a bathroom, you must first install the laminate floor to be under the sink and the bathroom.

The preferred practice is that the bathroom flange is sitting on the top of the finished floor, if the floor is made of wood, vinyl, tiles or other. It is therefore the weight of the bathroom, and the occupant, is held by the floor and not the pipes.

If you are installing a new floor, pedestal sink, and toilets, you must install the laminate floor first, so your under the sink and toilets. Since laminate floors galvanized above the sub-floor on the top of the sublobament, it expands and contracts slightly with the temperature and humidity of the room.