Flooring in double-layer vibro compressed concrete slabs CE marked, produced and checked according to EN 1339, consisting of three rectangular and square formats of dimensions 36 x 24 - 24 x 24 - 24 x 12, thickness 8 cm, series finishing DRAINING (double layer). ). The blocks must have a draining capacity of about 80 l / min m2. The particular double-layer finish is made with selected aggregates which guarantee abrasion resistance, durability and coloration lasting over time.