![A white powdery deposit called efflorescence, common on new brick walls. It is caused by salts in the bricks reacting with rain Stock Photo - Alamy A white powdery deposit called efflorescence, common on new brick walls. It is caused by salts in the bricks reacting with rain Stock Photo - Alamy](https://c8.alamy.com/comp/C41XP0/a-white-powdery-deposit-called-efflorescence-common-on-new-brick-walls-C41XP0.jpg)
A white powdery deposit called efflorescence, common on new brick walls. It is caused by salts in the bricks reacting with rain Stock Photo - Alamy
Brick Aid - What is this white stuff all over my house? It's called Efflorescence, it occurs when water leaves behind salt deposits and is present on or in the masonry surface.
![What is Efflorescence? How to Prevent, Treat and Remove White Discoloration from Concrete | For Construction Pros What is Efflorescence? How to Prevent, Treat and Remove White Discoloration from Concrete | For Construction Pros](https://img.forconstructionpros.com/files/base/acbm/fcp/image/2020/05/Quikrete_Efflorescence_1.5ecd823945b46.png?auto=format&h=800&q=70&rect=0%2C0%2C1200%2C675&w=1200)