Assessing the integrity of sub-structures is imperative to ensure the effectiveness and sustainability of construction practices. Once sub-structures are erected, gathering information about their integrity becomes a challenging task. This study specifically focuses on evaluating the integrity of a diaphragm wall constructed in Bengaluru using thermal integrity profiling. The testing procedure involves the meticulous installation of thermal sensors along the reinforcement cage at one-foot intervals, covering the entire cage. Following the lowering of the cage, data acquisition devices are connected to each wire, enabling real-time data transmission to the cloud every 15 min during the concreting process, and facilitating remote monitoring. Data collection continues post-concreting until the peak temperature is reached. The obtained results are scrutinized for the panel’s temperature profile consistency and alignment at the peak temperature. Panel integrity is assessed based on the average temperature measurements from each thermal wire at each depth increment. The data derived from this comprehensive test can unveil localized increases in concrete, indicative of bulges, as well as decreases in cross-sections. The study concludes by presenting the findings and insights from the thermal integrity test, accompanied by a detailed discussion on the merits and demerits of the testing methodology.