Mold in the room is the chief culprit of respiratory diseases. Sometimes it hides in the cracks of carpets or walls, but in most cases it will climb out of the corner sooner or later. Grape and Aspergillus Niger, the two most common molds, are black and green, and brown varieties are rare. Wall mold: also known as wall mold spot, wall hair, wall cancer and so on. ; Most of them grow on damp walls such as living rooms, kitchens, bathrooms, balconies, windows and around swimming pools. This is a visible biological flora. Grape ear mold and Aspergillus Niger, the two most common molds, are black and green, and a small number of brown varieties have appeared at present. Wall mold can grow indoors and outdoors, and spore powder flows with the air. When it meets the corresponding environment, it will adhere to the surface of the object and spread rapidly, which will directly endanger people's physical and mental health and indoor environment. The reasons why the wall is moldy are:
1. Structure: Most buildings are frame structures, and the walls are filled walls. The joint between the wall and the beam is prone to cracks, which is the weak point of thermal insulation and waterproof, seeping in summer and cold in winter.
2. Construction: the external wall brick is not properly embedded, the brick joints are not filled or the joints are not tightly sealed; Exterior wall filler wall plastering mortar is not full, with sand holes and cracks; The joint between wall and beam-column is not tightly filled, resulting in cracks; When installing doors and windows, the foam filling is not dense and there are gaps.
3. Environmental factors: due to local cracking of the external wall, the winter climate is cold. The wall is cold, the room is hot, and it is easy to condense.
4. Household: The indoor air circulation is poor, the indoor humidity is too high, and floating objects containing nutrients in the indoor air are attached to the wall, which is easy to produce mold.
5. Decoration: Interior decoration materials contain certain nutrients. For example, white contains a certain amount of cellulose, and the sugar in cellulose is easy to produce mold at a certain temperature and humidity.
6. The German newspaper Le Monde reported that mold will only reproduce when the air humidity exceeds 70% for a long time. On the one hand, the reason may be the architectural defects of the house, on the other hand, the improper behavior of the residents themselves may also cause humidity. But it is often caused by two reasons. Lei Jin, a microbiologist at Dessau Environmental Protection Bureau? Severchik believes that the most typical situation is that "the window is resealed and the outer wall has no insulation layer, so moisture will be generated on the cold wall". On the contrary, if the wall is re-insulated, the old windows are not well sealed, and air circulation can be maintained. Usually such a house is not easy to produce mold.
7. Contrary to popular belief, mold does not only appear in old buildings. Thomas from the Stuttgart Health Bureau? Gabriau said: "We have noticed that more and more new houses are moldy too quickly." It takes 1 to 2 years for the water in the wall to evaporate. The furniture embedded in the wall and the subsequent coverings such as wallpaper and carpet actually seal up the moisture and create the best living environment for mold. Once the mold breeds indoors, it is difficult to disappear by itself, and it may take several months to completely remove the mold.
Removal method: Many people think that the mold on the wall can be removed by wiping off or repainting the wall with a rag, and some people use alcohol to remove it. In fact, these are all wrong ideas, which can only be temporarily eliminated or covered up, but not completely eliminated. After a while, mold will appear again and become more and more serious. Because wallichia is a kind of flora with strong vitality, the propagation mode of mold is divergent spores, which will grow in other places after being killed in one place. If the environment in which it grows is not completely destroyed or its flora is killed, it will multiply and spread rapidly when it meets the corresponding environment. Therefore, we can only take the following two methods to completely remove the mold on the wall: 1, and rebuild the wall with high-quality building materials. One is to do insulation from the inner wall, which not only destroys the decoration of the room, but also has short-term effects. Many owners will not recognize it, and even go to court for room decoration and property compensation; The other is to use high-quality materials from the external wall to make waterproof insulation layer. This method is completely solved, but the external walls of buildings have to be redone, which not only takes a long time to construct, but also costs a lot, which is unbearable for many companies. At present, it is rarely used in existing buildings.
2. Use Li Qing wall release agent: Please shake this product evenly before use, spray it with ordinary air pressure, and spray it directly on the mold on the wall. Mold will decompose naturally within 30 minutes, and the wall will return to its original color, leaving your room as clean as ever.