Abstract
In this research, it experimented in exterior wall diagnosis using the trial examination object which created the exfoliation part of the outer wall artificially for the purpose of grasping the tendency about the detection accuracy and the measuring limit of the defective part for every diagnosis method. As a result, the thickness of the defective part and the size of the defect, it will vary depending investigation techniques such as an infrared inspection or a test hammer inspection by an inspector, there is a clear difference in the extent of degradation diagnosis can be revealed.