Moisture regain: causes and treatment methods

Moisture regain refers to the phenomenon that the ground at the bottom of a building becomes slippery. In this paper, the causes and treatment methods of resurgence phenomenon will be discussed in depth to help readers better understand this problem.

Meiyu season is easy to happen.

When the humid air with high temperature (humidity as high as 90%) meets the cold and smooth ground, it is easy to form condensed water on the ground. This situation is most common in the rainy season, when there is much rain, high temperature and high humidity. However, once the weather improves and becomes dry, the resurgence will soon disappear.

Water rising in foundation soil

The water in the foundation soil rises by capillary action, and the water vapor permeates upward, which can also make the ground material wet. This kind of situation happens all the year round and is difficult to deal with. In addition, poor outdoor drainage and poor indoor ventilation are also the reasons for the resurgence. In southern China, because the surface layer is mostly clay and loam, the capillary water level can reach 2-2.5 meters, which will be aggravated when building materials with poor compactness are used as indoor ground.

job operation

In order to prevent and deal with moisture regain, we can take the following measures: 1. Keep indoor ventilation and increase air circulation; 2. Use moisture-proof materials, such as moisture-proof floor and moisture-proof paint; 3. Strengthen outdoor drainage and keep the drainage unblocked; 4. Use dehumidifier, air purifier and other electrical equipment to adjust indoor humidity. These methods can effectively prevent and deal with moisture regain.