Understanding moisture in concrete leads to design of floors and flooring systems that provide excellent service for many years. This book discusses sources of moisture, drying of concrete, methods of measuring moisture, construction practices, specifications, and responsibilities for successful floor projects. The second edition incorporates a brief discussion of terrazzo issues, additional references on drying times of lightweight concrete, an extended discussion of issues with ASTM F1869 moisture emission testing, and updates to the sources of supplies and standards.