Why does a concrete floor sweat?

Answer

If a concrete floor is sweating, the likely culprit is a condition known as sweating slab syndrome, in which the interior concrete slab's surface occasionally develops moisture as a result of dew point condensation. This makes the surface of the concrete slippery, making it dangerous to move or lift heavy objects while on that surface.

When dew point condensation causes a concrete floor to sweat, humid, warm air makes its way into a structure through open windows, vents and doorways. As the air moves around, it condenses onto any surface it finds that is at or beneath the dew point, which is frequently the floor. When the ambient temperature goes up rapidly, along with the relative humidity, a sweating slab is likely to happen, because the humid air entering the space takes a lot less time to heat the air inside the space than it does the floor. This often leaves the slab cold enough for condensation to happen.

In some cases, when salt deposits are present on the concrete floor, the floor sweats as well. Salt draws moisture from the surrounding air as well as from the concrete. Sometimes moisture develops inside the concrete, pushing the salt in the mixture to the surface, where it attracts more moisture.

Q&A Related to "Why does a concrete floor sweat?"
Wicking can occur when there is a breakdown of the vapor barrier installed beneath the concrete floor. Wicking can also occur if a vapor barrier was not installed prior to pouring
http://www.ehow.com/how-does_5242843_concrete-floo...
1. Cover your nose and mouth with a respirator to prevent breathing in small particles of concrete. Purchase or rent a concrete grinder that it suited to the size of your garage floor
http://www.ehow.com/how_6630284_resurface-concrete...
1. Spread floor adhesive along the edge of the floor where you want to start, applying it with a notched trowel. Generally, you should start at the longest unobstructed edge, but
http://www.ehow.com/how_7888341_lay-bamboo-floorin...
1. Clean the concrete. Wet it down and put an alkaline degreaser in a tub. Dip a long-handled broom into the tub and scrub onto the concrete. Let it sit for 15 minutes and power-wash
http://www.ehow.com/how_4813266_paint-outdoor-conc...
1 Additional Answer
Ask.com Answer for: why does a concrete floor sweat
Why Does a Concrete Floor Sweat?
Wicking can occur when there is a breakdown of the vapor barrier installed beneath the concrete floor. Wicking can also occur if a vapor barrier was not installed prior to pouring the concrete. This occurs when water from the soil beneath and surrounding... More »
Difficulty: Easy
Source: www.ehow.com
Explore this Topic
The reason many wine glass might survive a fall onto a carpet versus the concrete floor is very simple generally speaking carpets are very soft and they also have ...
Slugs come inside the house during the cold season so as to get warmth. They get in through drain pipes holes outside the house or gaps on solid concrete floor ...
About -  Privacy -  Careers -  Ask Blog -  Mobile -  Help -  Feedback  -  Sitemap  © 2014 Ask.com