Fundo Plano is a 65mm thick floor element. The flooring system is a complete system with factory integrated drains (DN 40) in the board. The flooring drops from 65 to 52mm by the drain. The flooring system is genius for rennovating old concrete constructions, since the drain can be led to wherever you should want. The system is completely Plug n' Play! Since everything is a fully integrated 100% waterproof system.