Efflorescence in external walls is caused by
A) The cement in the mortar
B) Acid rain
C) Soluble salts in the bricks
D) Corrosion of the wall ties
E) A chemical reaction between the bricks and the insulation

Question

Quizplus · Accepted Answer

Efflorescence in external walls is caused by soluble salts in the bricks. When water penetrates the walls, it dissolves the salts and brings them to the surface. As the water evaporates, the salts are left behind, forming a white, powdery substance on the surface of the bricks.

Efflorescence in External Walls Is Caused by