Water seepage from the exterior of the house is one of the most common conditions. Many people do not know how to deal with this situation. The leakage of the external wall is very embarrassing, but how can we solve it? Then what is the maintenance method of the external wall seepage? Today, Xiaobian will take a look at the external wall seepage maintenance method and maintenance precautions. Let's hope that you can help you. External wall seepage maintenance method: After finding the cause of the leakage of the external wall, it can take certain measures for it. For this type of external wall leakage phenomenon, it is mainly to repair the mortar layer of the external wall, the surface crack, the empty drum layer and the leakage micropores. To restore the waterproof protection function of the cement mortar layer. The specific method is to remove the hollow portion of the cement mortar layer, and then repair and level with the polymer cement mortar, wherein the polymer and cement mortar should be layered and pressed, and the thickness is used to flatten the wall surface to the standard. In the leakage of the external wall, if the gap on the surface of the wall is wide, the gap should be wetted first, and the gap should be filled with inorganic waterproof plugging material. If the gap is narrow, polyurethane waterproof coating can be used. Brush the gap, the thickness should be controlled between 1-1.5 mm during the brushing process, and for the width and narrowness of the gap, it can be filled with inorganic waterproof plugging material as standard. If it can be filled in, it belongs to the comparison. A wide gap, if not, is a narrow gap. Hazard of water seepage from external walls : We should all understand that if the leakage of the external wall is serious, the durability and safety of the engineering structure will be reduced. Because there are void cracks in the concrete, there are also gaps and cracks in the blocks and mortar of the masonry. After the outer wall leaks, Water enters into it. If the temperature drops below zero, the water will form ice and its volume will expand by about 90%. The material will be directly extruded, causing the surface of the material to be ablated. At the same time, the remaining water will be squeezed, causing pressure inside the material. Stress, which causes cracks, or causes cracks to expand further. This phenomenon is called freezing. The greater the porosity of the material, the more cracks, the greater the water content and the lower the humidity, the more severe the freeze. As the age of use increases, the freeze erosion becomes more and more serious. As a result of the freezing, the cross-section of the material is continuously reduced and the cracks are increasing and widening, and the load carrying capacity of the material is also decreasing. This is very rigorous and horrible. If the protective layer is damaged and the steel will be corroded, the cross section of the steel will decrease continuously. In addition, if the steel is rusted and its volume expands by about 1-4 times, the concrete will be squeezed, causing the crack or crack to further expand or even collapse.ç ¼ Protective layer. All of this will result in reduced structural durability and safety. Precautions for repair of external wall seepage : 1. Continuous irrigation and cold connection: the continuous irrigation part and cold connection of each layer, because the restraint effect between concrete can not be expected, if the small earthquake and concrete shrink, the joint will be cut off, and the formation will be easy to leak. The situation of the rain. According to this situation, we should configure the corresponding proportion of concrete and wall paint, and brush the outer wall with a brush. 2. Cracks in concrete: Concrete placed on site, each layer has continuous filling joints or cold joints, which are prone to honeycomb or poorly filled parts, forming congenital shrinkage cracks. This is especially true for large span walls or continuous waist walls that protrude outward from the wall structure. We will carry out the thinning of the wall paint according to this specific situation, and use the wall brush to fill the cracks intact. When there is water seepage in the exterior wall of the house, it is difficult to find the source of water seepage. The above is the outer wall seepage maintenance method and maintenance precautions introduced by Xiaobian today. It is over here. For more information, please continue to pay attention to the decoration home. 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