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    jimerskine's Avatar
    jimerskine Posts: 1, Reputation: 1
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    #1

    Jul 12, 2010, 04:43 AM
    White algae on brick walls outside
    How should I treat and get rid of white algae or fungi on outside brick wall
    KBC's Avatar
    KBC Posts: 2,550, Reputation: 487
    Ultra Member
    		  
    #2

    Jul 12, 2010, 04:59 AM
    Are you sure it's not calcium or lime build-up on the brick,not mold?

    Calcium/lime deposits are a lot more common on brickwork,namely from the mortar(lime mix with sand)and common rainwater leaching the chemicals from older bricks.

    A pressure washer and something like CLR,Lime away, etc.. That would bring back a certain amount of the original bricks, if not all.

    Look into the chemical uses listed on the labels and find out what exactly the build-up on the bricks really is.
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