Basement resurgence is a common problem in many buildings, especially older buildings and underground facilities. Moisture regain not only leads to a damp and uncomfortable indoor environment, but also can cause problems such as mildew and corrosion, posing a potential threat to the structure and service life of the building. The purpose of this paper is to analyze the main causes of basement moisture resurgence, in order to provide theoretical support and practical guidance for solving this problem.
First of all, an important reason for the resurgence of moisture in the basement is the high water table. When the groundwater level is close to or above the basement ground, groundwater can infiltrate into the basement through the soil, causing the ground and walls to become wet. This is especially true during the rainy season or in areas with abundant groundwater. Long-term humidity not only affects living comfort, but also accelerates the decay and aging of building materials.
Secondly, the lack of waterproofing measures in the basement is also a common cause of moisture return. The waterproofing layer is a key structure to prevent groundwater infiltration, and if the construction quality of the waterproof layer is poor, the materials are unqualified, or the aging and damage occurs after long-term use, it will lead to groundwater infiltration into the basement. In addition, the connection between the basement and the outdoor ground, such as entrances and exits, ventilation shafts, etc., is also easy to cause groundwater seepage if the seal is not tight.
Again, poor ventilation in the basement is also an important factor that leads to moisture return. Basements are usually located at the bottom of the building and have poor natural ventilation. If there is a lack of effective ventilation facilities or the ventilation system is not properly designed, the moisture in the basement cannot be discharged in time, resulting in an increase in humidity. Prolonged periods of high humidity can not only lead to moisture return, but can also promote mold growth, which can negatively impact indoor air quality.
Humid air and condensation caused by excessive temperature difference will also aggravate the humidity in the basement, especially in areas near rivers, lakes and seas, most of which are also perennially warm areas, so the large volatilization of water vapor makes the air humidity at a high level all year round.
In summary, there are various causes of basement moisture resurgence, including high groundwater levels, inadequate waterproofing measures, poor ventilation, and improper use and management. In order to effectively solve the problem of basement moisture return, it is necessary to start from many aspects and take comprehensive measures, such as strengthening the construction and maintenance of the waterproof layer, increasing the indoor negative pressure waterproof and moisture-proof layer, improving ventilation conditions, and controlling indoor humidity.
At the same time, strengthening the use and management of basements to avoid increasing indoor humidity and storing damp items is also an important measure to prevent moisture return.