We all know that the aging of the wall surface will occur over time, and even some walls will fall off and become moldy. This phenomenon not only affects the beauty of the room, but also can not achieve the effect of decoration. At this time we can choose to renovate the wall again. What are the old wall renovation techniques ? Let's take a look with Xiaobian.
First, the old wall renovation skills - the basic treatment of the old wall
Mainly to clean up the original old wall decoration and decoration. It generally includes the removal of latex paint and putty layers, the removal of wooden decorations, and the removal of other decorative objects. If the wall of water-resistant putty only decoration for a year or two can not be eradicated, as long as the use of sandpaper and steel brush to brush the wall after re-painting latex paint on it. However, if the water-repellent putty is used for more than five years, Xiao Bian recommends that all eradication be done to the bottom of the wall, and then brush it again. 
Second, the old wall renovation skills - the basic steps
1. Clean up the walls: Before the renovation of the walls, do a basic treatment on the walls. If there are serious powdered walls, remove them completely and apply a layer of white cement. In the case where the old wall surface was painted beforehand and the wall surface was too smooth, the first step was to remove the loosely bonded skin, which was more convenient for the new paint to better adhere to the wall. 
2. Brushing primer: The wall must be painted with a primer. The primer has the function of sealing the substrate. It not only resists alkali and moisture but also protects the topcoat. If paint is applied directly without a primer, air bubbles and mildew will appear when the wall is used for a long time, and it will change color after prolonged exposure to the sun.
3. Large-area repair: If it is already difficult to repair the topcoat, it is relatively easy to produce color difference, and the quality of the wall will be affected by the different materials. Therefore, it is best to repair large areas when repairing, so that it can prevent the occurrence of color aberration. 
4. Against chromatic aberration: When matching the paint, it is best to match according to the proportion of the paint, and the amount is also good. It is best to prepare enough dosages at one time so that the wall surface will not be more beautiful because the paint is not enough to produce the color difference of the reconstitution ratio.
Editor's summary: The above is about the renovation of the old wall renovation skills , hoping to help the majority of friends. If you need to learn more about the renovation of the wall, you can always pay attention to us, and the following articles will be more exciting.
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