Removing Efflorescence From Concrete Block Walls

It s an alkaline substance composed of salts and minerals from the concrete itself in.

Removing efflorescence from concrete block walls.

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. In fact efflorescing salts are water soluble which means efflorescence may disappear on its own due to normal weathering. Removing efflorescence from a new patio is a breeze compared to cleaning a 400 year old fresco. Efflorescence typically shows up better on darker concrete and occurs when the salts and other materials in the concrete make their way to the surface.

To remove efflorescence from your concrete block walls you will need a few handy tools and ingredients. Concrete can be stained when salts and other materials will come off the concrete surface. Joe nasvik an example of extreme efflorescence. If you notice a white powdery film on your basement walls efflorescence is likely the culprit.

White efflorescence stains on concrete block wall. 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. Before sealing a concrete block wall it s important to remove any white efflorescence using an efflorescence remover such as quikrete efflorescence rust remover. The technique part of a three year restoration project that began in 2011.

To clean efflorescence off brick it is crucial to complete this task in warm dry weather. Removing efflorescence can be quick and simple. If you are working with an outdoor surface you can carry out this step with a garden hose. The chalky white substance so often found on old brick cement or cinder block walls is efflorescence.

This can diminish the appearance of your basement walls. Efflorescence will be triggered by low temperatures humidity condensation and rain. The stains are normally white and are present in darker colors more than white or pale colors due to the contrast created by the chemical reaction. The concrete was placed colored and stamped shortly before winter.

Contents causes for formation. With a strong brush you can remove efflorescence with ease. It is caused when water soluble salts are present in the concrete material which comes on to the surface while evaporation of water from the concrete. The first step in removing efflorescence is to vigorously rinse the concrete with water.

Give your concrete surface a thorough rinse.