Efflorescence is the white powdery substance you might notice on basement walls, concrete surfaces, or masonry materials. It forms when water moves through a porous material like concrete or brick, ...

Q: I have noticed a white powder around the edges of my concrete walkway. Should I be concerned? A: The white powder is the result of efflorescence, which occurs when a soluble salt, such as earth, ...

We may receive a commission on purchases made from links. If you've noticed a white, powdery substance on a surface in your home, you may accidentally mistake it for mold at first. However, upon ...