What is the white chalky substance on my walls?
Efflorescence. Concrete is made of three materials: stone, lime cement, and sand. Efflorescence is the chemical breakdown of the lime cement, the bonding agent that holds your walls together. The water inside of your foundation walls is slowly bleeding the lime cement out of the wall, leaving the white, chalky substance. Over time, there will be nothing to hold the wall together, resulting in cracks and foundation deterioration.
