Fixing a wet basement begins with finding the cause. Infiltration of surface water, infiltration of groundwater, presence of outside humidity, and presence of indoor humidity are common causes of wet basements. Surface water intrusion is when water runs toward the foundation and finds an entry. Groundwater enters through the walls and floor by wicking action or by hydrostatic pressure when the surrounding soil is saturated or the water table is high.
Warm, moist summer air can enter a house and condense on the basement’s cooler floor or walls. Indoor activities, like an improperly vented dryer, can create humidity that settles in the basement.Fix the ProblemTo avoid ongoing problems with mold or mildew, get rid of any water-damaged furnishings and possessions unless they can be properly cleaned. Then identify and treat the source of the problem.