What is the reason for the mildew on the wall?

On rainy days, some units will get water around the windows, which will make the walls around the windows wet. If this happens for a long time, the walls will be moldy and hairy.

2. Decoration.

Decorate the wall with some nutrients, such as white material. This substance contains cellulose, and this cellulose contains a certain amount of sugar, which is easy to produce mold when the humidity and temperature are low. Some people decorate the wall before it dries, indirectly leaving moisture inside the wall, which is prone to mildew after a long time. Secondly, the decoration materials are too inferior, which will also lead to moldy walls.

3. External wall quality problems

In some external wall construction, brick joints are filled unevenly, such as uneven mortar application, cracks and trachoma. Secondly, some walls are not closely connected with beams and columns, which will also produce moldy walls. In addition, some external walls have cracked, resulting in water seepage and mildew.

4. Waterway reasons

When some people decorate their houses, they will install waterways in the interior walls. If the water pipe in the inner wall leaks, it will also lead to mildew on the wall.

5. Poor water resistance

In some houses, the top waterproof layer is not well done, or the original waterproof layer is destroyed in the later use, which will leak to the bottom, and also cause mildew, long hair and black spots on the wall.

6. Environmental factors

Some homeowners do not pay attention to ventilation during use, and the indoor air circulation is not smooth, which leads to high indoor humidity, and the wet wall is prone to mildew and mold.