DBI has an extensive experience base with interior gypsum board and plaster systems and exterior gypsum sheathing systems. Specifically, having managed the construction systems laboratory at the United States Gypsum (USG) national R&D Center, Mr. James Daniel (founder and Sr. Principal of DBI) has an unprecedented knowledge of the behavior and performance of gypsum based systems produced by most all manufacturers. He has investigated hundreds of non-performing systems involving cracking, finishing issues, paint acceptance issues, fire rated assembly issues, fastener pull-through and paper delamination issues, and mold growth issues. As a consultant, he has continued to assist major gypsum board manufacturers with new product development and product improvement through third-party evaluation and testing programs.