WILLIAM B. ROSE is a Research Architect at the Building Research Council at the University of Illinois. His research, which focuses on moisture and its effects on buildings, is used by the U.S. Department of Housing and Urban Development (HUD) and other agencies. He serves as a consultant to museums and historic buildings on moisture problems, including Independence Hall, Frank Lloyd Wright's Unity Temple, and Thomas Jefferson's Poplar Forest. He has instructed hundreds of architects on the power of water through the American Institute of Architect's continuing education series, Water in Buildings.