The Construction Specifier, Mar. 2017, by Anthony Katona.
https://www.constructionspecifier.com/codes-and-standards-for-energy-conservation/

"Concerns with global warming and energy consumption mean design/construction professionals need a better understanding of how these topics affect commercial buildings. This article presents an overview of the effects U.S. model building and energy codes—along with industry standards—have on low-slope roofs (assembled with insulation above the roof deck) and exterior masonry walls."