Cleaning Efflorescence From Concrete Floor

Certain forms of efflorescence are considerably difficult to remove and chemical agents. Efflorescence is white powdery material formed on concrete floor surface when soluble salts migrate to the surface of concrete. The white powder that builds on concrete walls and floors is a soluble salt called efflorescence and is a result of water that has seeped through concrete and evaporated.

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Luckily there are easy ways to remove efflorescence in your home.

Cleaning efflorescence from concrete floor.

These surfaces allow water to travel within the surface. At this point moisture may bring additional salts to the surface of brick and the salts can be removed by dry brushing. With any luck the efflorescence will stay away long term after enough cleanings have been performed. Art restorers in valencia spain were able to erase efflorescence from 17th century frescoes by antonio palomino in the church of santos juanes by using special bacteria selected to eat the salts and glue residue on the art.

We are hearing more about efflorescence related issues because of the popularity of stained floors. As the trend to have exposed concrete floors grows the industry is struggling with the problem of unsightly efflorescence especially when it is trapped under a film forming sealer. To clean efflorescence off brick it is crucial to complete this task in warm dry weather. The extended period of water movement through the concrete to the surface brought chemicals to the surface where they combined with carbon dioxide from the air to produce calcium carbonate the white chemical you see in this photo.

When moisture and water vapor migrate to the surface of hardened concrete floors walls and colored concrete it carries with it calcium hydroxide. Concrete efflorescence has a habit of reappearing which means that you may need to repeat the cleaning process several days to several weeks after initially carrying it out. The technique part of a three year restoration project that began in 2011. The concrete was placed colored and stamped shortly before winter.

Clear water repellents silicone and acrylic coatings also may help you remove efflorescence as well. Joe nasvik an example of extreme efflorescence. Concrete efflorescence is a very common problem on concrete especially decorative concrete. Efflorescence is a fact of life with most concrete.

The efflorescence can be happening when moisture starts to react with concrete causing some white stains in the concrete. Efflorescence occurs when salt and moisture come to the surface of concrete bricks or stone and then evaporate leaving unsightly white marks on your walls or floors. It is produced due to low temperatures moist conditions condensation rain dew and water added to the surface of fresh concrete to assist troweling. Some surfaces and mostly stained concrete will be more susceptible to the reaction than others.

Causes of the efflorescence in concrete. A continuing build up of efflorescence may be an indication that you need to waterproof your basement walls. Removing efflorescence from a new patio is a breeze compared to cleaning a 400 year old fresco. How to remove efflorescence from a concrete floor.

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