It's humid in the south, how to prevent mildew on the wall, Zhihu.

First, the reason why the wallpaper is moldy

The interior of the wallpaper is moldy, mostly rubber wallpaper or wallpaper with poor air permeability. Because the moisture in the wall increases in the rainy season, the wallpaper is airtight, and the moisture cannot be volatilized or volatilized slowly, thus breeding a large number of molds.

Second, preventive measures

1. Choose a wallpaper with good air permeability.

Generally speaking, some natural materials such as reinforced wood pulp, especially wallpaper made of wood fiber, will not be moldy. The traditional PVC plastic wallpaper is really prone to mildew on balconies and in the south where the humidity is too high. Because the moisture in the wall and air is covered by the surface plastic, it cannot be naturally volatilized and dried, so the oxygen-deficient and humid environment is suitable for mold propagation.

2. Before construction, the basement membrane must be coated on the wall.

Coating the basement membrane on the wall before construction can make the wall more compact, and form a protective film on the wall to prevent moisture from infiltrating from the wall, so that the wallpaper glue and wallpaper will be damp and mildew.

Three, the rainy season construction should pay special attention to.

1. The wall must be dry.

If the dryness of the wall can meet the requirements of wallpaper construction (using a humidity tester, the value cannot exceed 8), when mixing the glue, try to thicken the glue. Use a short-haired roller when gluing, and the glue should be as thin as possible. The wallpaper glue will dry in about 3-4 hours. In this way, the wallpaper will not only be moldy, but also will not be tilted and cracked, because many times the wallpaper will be tilted and cracked because the glue is too thin or too thick.

2. Make the wall waterproof when decorating.

The basement membrane must be brushed. It is suggested to brush two kinds of basement membranes with different functions, the permeable basement membrane first, and then the diamond basement membrane, which will greatly improve the waterproof performance of the wall and prevent the wallpaper from becoming moldy.

3. Do anti-mildew treatment.

Do anti-mildew treatment and spray anti-mildew agent before brushing the basement membrane; After brushing the basement membrane, spray the mildew inhibitor again to ensure mildew prevention to the maximum extent.

Try to keep the wallpaper clean and tidy.

Usually, the wallpaper at home should be careful not to get stained, because even using professional decontamination liquid will destroy the texture and color of the wallpaper surface. We don't recommend using professional detergent when cleaning. We can use a tool called needle hair, which has little damage to wallpaper and is convenient for dust removal when brushing. However, such tools are relatively rare in the market, and ordinary families can use dry cotton cloth to remove dust.

The moldy phenomenon of southern wallpaper can be avoided as far as possible through wall treatment, auxiliary materials selection and wallpaper selection.