Spalling Brick

Brick deterioration starts at the top of the brick near the outside edge.  Water infiltrates from above, through a deteriorating, or recessed mortar joint.  The face of the brick separates from the rest of the brick, leaving the inside exposed to the elements.  This occurs frequently with recessed or deteriorating mortar joints or inferior brick.

Notice how the only spalling brick happens to be below the crack in the cement cap.

 

A. Water enters the top of the brick through a failing mortar joint, creating an ice pocket.

B. The ice pocket expands and collects more water.

C. The face separates after several freeze-thaw cycles.