Dr. Karen Liu is the Director of Research and Development for Xero Flor North America. Karen has been conducting green roof research since 2000 when she was a research officer at the National Research Council’s (NRC) Institute for Research in Construction in Ottawa, Canada. She has established the first North American field facility dedicated to green roof research at the NRC and conducted several green roof research field studies across Canada to study the climate sensitivity of the technology. In 2006, Karen moved to BC and led the green roof research team at British Columbia Institute of Technology’s (BCIT) Centre for the Advancement of Green Roof Technology to improve the engineering performance of green roofs. Karen obtained her Ph.D. from the Department of Chemical Engineering and Applied Chemistry at the University of Toronto.