Why do buildings deteriorate? And how do we investigate and diagnose the causes, as well as design and implement appropriate solutions? This course examines the deterioration of building materials and systems caused by both humans and nature. Through weekly lectures and one weekend workshop, students will learn how to plan and execute an investigation, identify the symptoms, determine what tests are needed, diagnose the causes, and design and administer necessary repairs to address deterioration and system deficiencies. Weekly lectures will use a combination of Virtual Live and online formats; a weekend workshop in Baltimore (date TBD) will include hands-on activities and a field trip to a local project site.