The presented research approach evaluates the applicability of IRT as a non-destructive testing method for Building Archaeological scientific purposes. Within a qualitative thermographic analysis, focusing on the examination of thermal patterns and anomalies, the evidence of Building Archaeological phenomena is demonstrated. Several radiometric assessments display how hitherto unknown subsurface structures and constructive interrelations are detected and simultaneously evaluated in order to both describe the historic fabric’s quality and integrate them into the comprehensive Building Archaeological stratigraphic analysis. With IRT providing a standardised mapping of material features, structural configurations and thermal anomalies, the procedure presented enables more detailed estimations of both condition and constructive contiguity of historic fabric in a comprehensive assessment.