| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for easily removing dirt on a tile surface for an outer wall such as: a part of slight dirt deposited on a tile surface for an outer wall, tough atmospheric pollutants deposited in a thickness direction, and sticky dirt that has penetrated into narrow holes, cracks, and joints.SOLUTION: The method for removing dirt on a tile surface for an outer wall comprises: grinding a part A of tough dirt deposited on the tile surface in a thickness direction with a water sander 3; washing away dirt A' that has been ground with the water sander 3, with water 5; performing watering 6 on the tile surface from which the dirt A' has been washed away; applying weakly acidic cleaning fluid 8 on the tile surface so as to remove a part B of slight dirt deposited on the tile surface; washing away the weakly acidic cleaning fluid 8 and the part B of slight dirt on the surface by performing water washing after the applied weakly acidic cleaning fluid 8 has penetrated into the narrow holes 9, cracks, and joints 2 of the tile surface; and removing a part C of dirt remaining in the narrow holes 9, cracks, and joints 2 by spraying high-pressure hot-water 11 to the part C. |
