The paper is focused on qualitative and quantitative evaluation of the thermal properties and thermal bridges of the old poultry structures. The results of the paper claim poor thermal properties most of the constructions. Qualitative detection of thermal defects with the utilization of infrared thermography claimed the most significant thermal bridges on uninsulated socle and flooring, straining band of the wall, gable wall brickwork and window, and door frame. Box-and-whisker diagrams were utilized for the presentation of outliers or extreme values of individual datasets.