Modular entrance floor system

A modular entrance floor system comprising:

• a plurality of floor sections, each floor section including:
• a base plate having opposing first and second surfaces and first and second sides defining a width of the base plate, wherein the base plate has a plurality of apertures extending between the first and second surfaces;
• and
• a surface plate having a pattern of rails and having opposing first and second surfaces and first and second sides defining a width of the surface plate, the surface plate being removably attached to the base plate and having at least one drain feature, the base plate further comprising a barrier sheet disposed on the second surface of the base plate adjacent the surface plate, wherein the width of the surface plate is substantially equal to or less than the width of the base plate;
• and wherein the plurality of floor sections are configured such that the surface plate of a first floor section is interchangeable with the surface plate of a second floor section.