What is the reason for the resurgence?

1 After the air humidity is high, the weather will rise, and the water vapor condensed at low temperature in winter will slowly melt and evaporate, and the air humidity will increase, but the temperature of the object will not rise quickly. At this time, when low-temperature objects come into contact with water vapor, it will appear damp indoors and outdoors, which is also the reason why it is easy to regain moisture indoors in spring.

There is more rain in spring, and the height difference between indoor and outdoor ground is close. There is a lot of rain in spring. When it rains, the groundwater level rises, and rainwater infiltrates, leading to resurgence.

3 building problems the temperature of the ground floor house is different from that of the upstairs house. The temperature of the ground floor building is low, and the humid indoor air will form water mist or small water droplets in cold weather, especially when the building temperature is relatively low, water molecules are easy to condense on the building, which makes the building easy to regain moisture.

It is normal to have a little resurgence in spring due to unreasonable opening and closing of doors and windows, but if it is serious, it may also be because it is unreasonable to open and close windows on weekdays. In spring, the air humidity is high, so it is generally not recommended to open the window, especially when the spring rain is continuous. It is recommended to open the window in the afternoon when the weather is sunny and the air is dry, and it is not recommended to open the window at other times to avoid serious resurgence.