Damp Spots On Basement Floor
If you re not sure of the cause of a damp patch on a wall try the foil test.
Damp spots on basement floor. Another common contributor to a wet basement is runoff from gutters. Basement condensation occurs when warm moist air comes in contact with your cool basement walls and floor. In many cases wet or damp basements can be made dry by addressing surface water runoff on the outside of the house.
As the walls cool the warm air moisture is created just like condensation on a cold beer on a hot summer day. It might be black brown yellow or green. Exterior humid air that enters the basement and condenses on cooler surfaces.
Efflorescence a french term that translates loosely to flowering out will produce a white or. There are just three sources of moisture. Rising groundwater causes hydrostatic pressure and that causes soil to push on your basement walls and floor.
This can make cracks form in basement concrete particularly in wet seasons and is often why there s water in your basement after rain. In many cases a dehumidifier can provide a solution. Grading the earth outside the foundation so water will flow away from the house.
If you have damp patches bubbling paint crumbling plaster or powdery deposits on wall. You won t know for certain if it s. Persistent condensation can lead to structural damage.
Liquid water from rain or ground water. If water enters your basement only through cracks in the concrete or masonry walls but not through the floor you have another option. How to fix wet walls and damp walls 1.