The Eurocode explicitly defines the minimum amount of reinforcement needed to give ductility to the masonry and prevent cracking. In this sense, it determines the vertical separation between reinforced rows will not surpass 60cm and the area of steel will not be less than 0.03% of the area of the wall. The measure is preventative, and given that it is explicitly stated in the Eurocode it can help deal with the civil responsibility derived from pathological processes produced by cracking in the walls. However this measure by itself does not guarantee 100% of the absence of fissures. What is really effective to avoid cracking is a good constructive design solution to avoid risk situations.