The stair has the capacity to make a residential pool even more elegant and refined the few steps expected form a simple access in the water for adults and also for the children and are a comfortable integration angle, conversation and relax. CEMI's proposal of an innovative and simply installing stair: it's a shaped stair build with polystyrene expanded blocks covered with a marmor resin and reinforced by a metal sheet in the stair steps, progressively covered by a PVC liner.