Wood is used extensively for interior and exterior applications such as residential, agricultural, commercial, industrial, educational, government, and other structures. Deterioration of in-service wood members results from a variety of causes—mainly related to moisture intrusion—during the life of a structure. In addition to routine maintenance and inspections, it is also important to periodically and thoroughly assess the condition of wood used in structures. Of particular importance are identifying and assessing decayed or partially decayed wood members or connections such that degraded members may be repaired or replaced to avoid structural failure. Such assessments are especially critical for building owners, occupants, and officials in municipalities that may be subject to catastrophic wind or other weather/climate-related events that cause temporary but significant overloading. A variety of techniques are available for assessment of wood in structures (Ross at el. 2006; White and Ross 2014). Early detection of decay is critically important for novel building technologies, such as those incorporating cross-laminated timber (CLT), because the fasteners and connections have become increasingly critical.