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View Full Version : Exterior brick cleaning (white powder like)


janna72
Apr 16, 2008, 11:25 AM
How would we clean our brick on the exterior of our home, it has a white powderdy substance on it, but water alone is not removing it. The brick is about 100 years old.
THanks so much

Scleros
Apr 16, 2008, 11:47 AM
Read Efflorescence: Cause and Control (http://www.masonryinstitute.org/pdf/612.pdf).

amricca
Apr 16, 2008, 12:23 PM
Muriatic acid is probably best to use. Power washing can work but can also drive water into the brick and cause more efflorescence or loosen the morter. In extereme case sandblasting is used but I don't recommend it.