Such floors are carried out through the vibrocompression, with a layer in concrete and river's sand that operates in such a way as to avoid the deterioration.
They are intentionally studied to solve the flooring's problems of all external areas, such as pavements, parking-places, and downhill roads.
The wide range of sizes and shapes (40x40, 25x50, hexagonal, "farfalla") and of colours give a pleasant look to large squares, court-yards and pavements.