TDBP has started research into the varied and disparate uses of terminology used to describe aspects of High Performance Design and Enclosure Technology as it is applied to building design. The moniker "High Performance" is itself ubiquitous, ambiguous, powerful and often misleading in the design and construction industry. "Rainscreen" is another similar term. While the application of the underlying principles about a rainscreen wall assembly can deliver a very high performing system, the term itself has been so completely overused and in-accurately applied that it often causes confusion rather than communicating clear ideas. Our goal is to identify clearly a full list of terms concerning high performance design and building enclosures, to research their beginnings and how they are used now and to finally develop industry standardized definitions.