Grasp an actual condition of external wall deterioration.
In the cases of tiling method and mortal coating, generally we can use both methods visual and hammering inspection and grasp the deterioration situation such as crack, floating, exfoliation, which happened on an external wall. It lets us make better choice of cycle of maintenance or repair method and they will be a criterion to judge conservation planning of building. According to an ambient condition of building or type of exterior finishing materials, by using various methods, we can grasp a condition of external wall deterioration.
