1) operation personnel technical level is low, the responsibility is not strong, the weak link has not taken effective preventive measures, such as the pressure of the spray gun is improper, the caliber is too large.
2) in the Yin and yang angle and Guan Genbian, team of grassroots plastering metope processing does not reach the designated position, not smooth, not smooth straight, lacquer construction team also did not do a good job handover inspection work, without further processing, leaving hidden dangers;
3) in lacquer emulsion formulation, some manufacturers in order to reduce costs, less than normal amount of emulsion, auxiliary agent amount slants much, resulting in decrease of bond strength;
4) and the wall base bonding putty, putty adulteration;
We visited many stone construction of exterior wall project, found that many places have Konggu off lacquer. Especially in the angle of yin and Yang, the window, Guan Genbian, rain affected relatively weak parts of the Great Wall at the other, the lacquer Konggu off is more prominent.