What Is The White Sediment Build-Up On My Concrete Walls? Efflorescence.

September 14, 2017


We've all seen it before- a thick white sediment build-up on the interior of a concrete wall. But what is it? you may be wondering.


At its core, this substance is a salt deposit. It is formed through a process called efflorescence, and no, we're not referring to the French term for flowering out!


Efflorescence is a chemistry term describing the process of saline water moving through a porous surface such as block or concrete. As a saline compound, this solution carries salt as it migrates, and once it reaches the exterior of the surface, the water evaporates and the salt deposits are left behind. This can form a crusting or coating of unsightly deposits. 


These deposits are undoubtedly damaging to the visual appeal of a surface. But the danger of efflorescence goes beyond mere aesthetics. This coating can also indicate weak structural integrity of the surface, which means it is highly susceptible to moisture intrusion.


Any time moisture is able to permeate a surface in your home, you are increasing your risk of developing a mold or moisture related issue. This increased moisture content, if allowed to mount, will only increase if left unattended. Fortunately, there are several options at your disposal. 


A waterproofing product applied to the interior and exterior surface of the wall will block voids and surface pores. Additionally, it covers stains and seals out moisture. This double-pronged solution is one of the many moisture controls Sunshine offers. For more information visit our page on moisture controls.


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