The wall is very damp and moldy. How to deal with it?

There are several reasons why the walls become damp and moldy. The exterior walls of the building are damaged, the property is not repaired in time, and in the rainy season, the exterior walls are not exposed to wind and sun, and the indoor walls will become damp. get mouldy. Recently, many friends have left messages saying that the walls at home are getting damp and asking how to deal with it. I personally summarized these issues. There are three main areas where moisture on the walls of your home is concentrated: the first area is the partition wall of the bathroom. The second area is the lower part of the exterior window. The third area is the exterior wall of the ground floor. Below I will also tell you the reasons and solutions according to the three areas.

The original wall surface will not be completely dry. At this time, when we renovate the wall surface, the original wall surface will be wet, causing the moisture on the wall surface to evaporate and penetrate after the putty is hung. This will cause moisture return. If the water evaporates due to insufficient temperature for a long time, mold will appear. Regardless of the quality problems that are likely to occur later, especially when we are constructing in winter, we need to pay more attention to these problems. If the indoor temperature is not reached, not only will the wall return to moisture in the spring of next year, but some more serious problems such as cracks will appear. Problems are possible.

Before each step, you need to make sure that the content in the previous step is completely dry. Among them, putty is especially difficult to dry - the base surface that has not been completely dried will slowly release water vapor in the future, which will cause the wall to become damp. If the waterproof layer of the building's exterior wall is damaged, it will cause water seepage in the building and cause moisture to return to the walls of your home. It may be difficult to detect at ordinary times, but once rain or snow arrives, moisture will appear on your walls.

But six months after I moved in, to put it in one sentence: I was so angry that my thighs were blue! During the continuous rainy weather, the floor and walls of my home looked like they had been soaked by sweat, with water stains and even the wall covering peeling off. It wasn’t until I heard my neighbors talking about it two days ago that I found out the reason for the return of moisture: the waterproofing was not done properly. The walls are moldy and damp, and failure to waterproof them is the culprit. Under normal circumstances, walls must be waterproofed. Especially for bathrooms, the waterproofing needs to be about 30 centimeters, while the shower area needs to be 1.8 meters waterproof. Only then can it be effectively waterproofed.