Why Does My Concrete Floor Sweat?

“If a floor slab’s surface is colder than the dew point temperature of the ambient air above the slab, moisture will condense on the slab’s surface. This condition, commonly called “sweating,” typically occurs when warm, moist air flows into a building with relatively cool floors.”

Why Does My Concrete Floor Sweat?

Concrete floors are one of the most common flooring materials used in homes and businesses. However, sometimes they can become a nuisance, particularly when they start to ‘sweat’. This is especially problematic if the concrete floor is in a basement or other damp location. Knowing why your concrete floor is sweating and what you can do about it, is the key to solving this issue.

The first and most important step to solving your concrete floor sweating issue is determining why it is happening in the first place. The most common explanation for why concrete floors sweat is condensation. This occurs when moisture in the air condenses on the cold surface of the foot, usually resulting from a stuffy and damp environment. In this case, the only way to fix the issue is to reduce the humidity in the room and/or provide proper ventilation.

Another potential cause of concrete floor sweating is hydrostatic pressure. This is when water is forced up through the floor due to pressure from the ground below. In this case, the best solution is to install a more suitable material such as a membrane or a waterproofing system to prevent the water from coming up through the concrete.

If your concrete floor is

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