Soft floors Floors of loose or porous material. A high rate of removal is achieved with these floors, but with higher tool wear. Medium-hard floors Normal building concrete. This includes marble and terrazzo floors. Hard floors Usually refers to steel trowelled floors or certain types of cement. This includes granite. The floors usually require “soft” segments. DT Series For unparalleled transition The revolutionary way to achieve the perfect floor in less time without compromising on quality. Read more Related Pages About HTC The history of the company