Efflorescence vs. Mold on Concrete Walls: How to Tell the Difference
White, chalky patches on basement walls are one of the most common things homeowners worry about. Many people assume it’s mold, but often it’s something else entirely: efflorescence. Quick answer: efflorescence is a harmless layer of salt crystals left behind when water passes through concrete, brick or stone and evaporates. It’s white, crystalline, dissolves in…
