The Stucco ID Decision Tree Card provides a concise, step-by-step decision process for identifying the type of stucco on a building.  The Stucco ID Decision Tree encompasses the typical stucco systems in use in the United States and Canada over the past several decades; if the type of stucco on a property cannot be identified by this decision tree, then, most likely, it is not an approved system, although there may be a few exceptions or more than one type of stucco on a building.