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PROBLEM:
I have noticed a few of the bricks on my home have some marks on them that do not match up with the rest of the brick. What could this be? Can this be fixed?
PICTURE:

SOLUTION:
Sounds like your brick mason has laid a few of the bricks back side out. The brick manufacturer will sometimes put an identifying mark on the back of the bricks. Unfortunately after the brick are laid the removal of the brick would probably leave a more noticeable patch than the marks. It is our recommendation that the brick be left in the wall.
SUPPLIERS:
Search for brick distributors in your area.
Link to the brick manufactures page.