Efflorescence, something that many of us come across but may not be sure of what it is. It’s a crystalline deposit of salts than can be seen on floors, or walls or other surfaces made of concrete or stucco, or brick and stone. This is commonly found in basements, but can be seen in other areas as well. Here is a recent example that SERVPRO of Hockessin / Elsmere, Delaware found on an outdoor water wall where the salt and water found in the grout and cinderblocks behind the glass tiles created the efflorescence found in picture.
The way SERVPRO of Hockessin / Elsmere handled this was to use a dry brush and a diluted solution of muriatic acid as to not damage the glass tiles. The homeowner was made aware that this will be an on-going solution, but not a cure. Very happy homeowners!