This paper explores the building science best practices for renovation and adaptive reuse of historic buildings, focusing on archaicwall assemblies within the realm of historic preservation. As the 20th century witnessed an acceleration in the use of innovative materials due to advancements in manufacturing and shifts in global policies, many traditional materials fell out of favor. However, their significance in historic buildings presents unique challenges, particularly in hygrothermal performance, where modern solutions like exterior insulation are not viable without compromising the building's aesthetic and historical integrity. Addressing these challenges requires bespoke solutions, particularly when interior insulation options are limited by the need to preserve interior finishes or when they risk impeding the structure's ability to manage moisture. Through a series of case studies, including a World War II-era school, a 1910s gymnasium, an industrial building repurposed as an art museum, and a historic classroom building, this paper will discuss the intricacies of each project. These include the identification of original construction materials, the design and performance goals for renovation, and the analytical methods that informed the adaptive reuse strategies. These investigations underscore the importance of tailored approaches in preserving historical integrity while enhancing building performance, offering insights into the evolution of construction practices and material science in the face of contemporary challenges.
