THIS IS NOT DRYER FOAM!
Often we are called to go and identify this white powder that some real estate owners find on their foundation walls or on their concrete floors. From the arrival of a representative we can immediately identify that it is efflorescence. Not to be confused with effervescence, many people are mistaken. But why is there efflorescence on concrete surfaces? Efflorescence appears on concrete surfaces when they are in contact with water for a long time. A mineral salt emerges from the concrete and forms crystals. Although it is not harmful to your health, it mostly conceals a bigger problem. The drainage system and the waterproofing of the foundations of a property should control the moisture level so that it does not happen. If the efflorescence appears in the center of a foundation one can suspect that it is a small hole or a crack in the foundation. If it is a white powder line at the bottom of the wall then the French drain can be suspected. A more in-depth study to define the cause is in order. Leaving your foundations too long soaked in water will cause major problems. We must act!