Efflorescence has been studied extensively.  Foundations often have deteriorated concrete surfaces.  The deterioration is most often caused by periodic wet-dry-wet-dry exposure to moisture over many years.  The mechanism is this: the base of the wall gets wet, and some of the water penetrates the concrete, carrying dissolved salts picked up from the soil, or the concrete.  The salts remain in solution until the moisture reaches a surface that is exposed to air.  As the water evaporates into the air, the salts are left behind and form crystals on the surface of the concrete NOT inside the concrete. The concrete can be quite sound inside even if it looks like the photo above.


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San Jose,Sunnyvale, Fremont,Oakland,Berkeley
And Surrounding Areas


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License Info

Works' Comp RWCC64393236
Contractors Lic #558462
Bond #SC6334450
Liability Ins PCA 1045011
Link to Contractor's License Board