Efflorescence on slate appears as white powdery residue or chalky buildup forming along grout joints, edges, or surface texture. It is caused by moisture moving through cement-based materials beneath or around the slate installation. What’s Happening SSlate itself is not cement-based, but it is often installed using cement mortar, grout, or setting beds that contain soluble…
Efflorescence on grout appears as a white, powdery, or chalky residue forming along grout lines. It is caused by moisture moving through the grout and bringing dissolved salts to the surface. What’s Happening Grout is a cement-based material that naturally contains soluble salts. When water penetrates grout — from showers, mopping, leaks, irrigation, or humidity —…
Efflorescence on concrete appears as a white, powdery, or crystalline residue on the surface. It is caused by moisture moving through the concrete and carrying dissolved salts to the surface. What’s Happening Concrete contains cement, which naturally includes soluble salts. When water enters the concrete — from rain, irrigation, groundwater, plumbing leaks, or improper drainage —…