一、雨水污染墙面的成因 当雨水沿墙面流经雨篷、阳台、窗台、突出腰线及墙面时,雨水在毛细现象和斜向风力的作用下,雨水将灰尘等污染物流到墙面,使外墙被雨水污染,留有雨污留挂的痕迹,造成了墙面污染,同时,雨水还会浸入墙面缝隙中,造成墙体渗漏,影响建筑物的使用寿命。 I. Causes of rain-contaminated wall surfaces When rainwater flows through the awnings, balconies, windowsills, and protruding waistlines and walls along the walls, rainwater is contaminated with dust and other contaminants by rain under the action of capillary phenomena and oblique wind forces. Face, so that the outer wall is contaminated by rain, leaving traces of rain and pollution left hanging, causing the wall pollution, at the same time, rain will be immersed in the wall gap, causing leakage of the wall, affecting the life of the building.