The best way to drain a masonry cavity wall is with flashing and weep holes. The flashing itself should extend beyond the face of the exterior wythe and turn down 45 degrees to form a drip. Although projected flashing gives the best drainage, many architects object to the aesthetic appearance of the joint. The metal edge of the flashing may be wavy, creating an unsightly horizontal line that detracts from the design. One way to solve the aesthetic problem and still maintain the integrity of the drainage system is to hide the exposed drip in a shadow or interrupted bond pattern.