What is the appearance of efflorescence on masonry?

Efflorescence on masonry is characterized by the presence of a white, powdery substance that forms on the surface of bricks, concrete, or other masonry materials. This condition arises when water-soluble salts are brought to the surface of the masonry by moisture. As the water evaporates, it leaves behind these salts, which appear as a white coating. This is a common issue in masonry and may indicate moisture problems within the structure, often necessitating remedial action to prevent further damage. The visual cues of efflorescence are clear and distinct, making it recognizable and a significant factor for masons to monitor.