PPInterlocking Flooring is a form of glueless "floating" flooring that is among the easier types of floor to lay. The PP Interlocking Flooring is made of planks that lock together at the ends and sides via special fittings. They lock tightly enough to form a solid surface. They aren't glued or nailed to the subfloor, but merely sit on top of it. Floor trim holds down the edges. Start with a firm, solid and clean subfloor of any flooring material other than carpeting.TOP-JOY PP Interlocking Flooring can be used as the surface of basketball court, tennis court, racquetball court, aerobics court, futsal court, handball court, volleyball court, badminton court, roller skating rink, roller hockey court, badminton court, gym room and other sports court.