Cork flooring made of panels or tiles should last a long time if properly maintained, but occasionally it will need to be sanded if it has become scratched or damaged. A cork floor is sanded as you would any hardwood floors with tiles, with the notable exception of a floor that has a veneer on top of the cork base.
Place a medium-grain sandpaper in the 60-grit range on an orbital sander. It does not matter if it sands against or with a wood's grain.
Sand your cork floor by walking from one wall to the wall on the opposite end of the room with the orbital sander. Continue sanding in rows between these two walls Turn your sander 90 degrees and sand across the rows you just sanded.
Place a finer-grain sandpaper on the orbital sander. Sand the entire room again as described above. The grain of this sandpaper should be in the 100-grit range.
Use a smaller hand-held sander in the areas where the orbital sander could not reach, such as right along the walls. Sand with the two different grain sandpapers. Use the 60-grit sandpaper first.
Vacuum up any debris from the sanding.
Apply a coat of polyurethane finish to your cork floor with a brush.
Buff the floor after the finish has dried with a cloth or buffing machine.