Slope-to-drain waterproofing concepts are an essential part of ceramic tile and stone installations. Over time, a variety of installation methods and products have been employed to achieve the required slope to drain. Failure to follow industry best practices can result in costly failures in wet-area applications.We will examine some of the historic means, methods, best practices, and forensic examination of failures. In addition, we will focus on new technologies which offer the architect, distributor, and contractor more consistent, reliable, and durable slope-to-drain installations. At the conclusion of this presentation, the participant will be armed with the most current and relevant information regarding slope-to-drain installation details.