Before you start cleaning the brick with any liquid or other agent, you should give it a quick vacuuming. Little crumbles of ...

While it’s not a danger in and of itself, efflorescence can be linked to excess moisture, mold growth, or poor drainage.

However, a month later, the red bricks started to get a white ... a block wall or any other masonry surface. Each time the masonry gets wet, the water dissolves some of the salt.