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Thread: Retaining Wall Cleaning

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    Join Date
    Jan 2014
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    Dallas, TX
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    Retaining Wall Cleaning

    Is there a TPF type method for cleaning retaining walls and flagstone?

    I have a power washer and could use simple green or bleach but I'm hoping there is some magic formula like sodium bicarbonate and vinegar!




    26,000 gal / in-ground SWG (Hayward T-CELL-15) / Blue Granite PebbleSheen / 2hp WhisperFlo pumps (main), 1.5hp WhisperFlo pump (waterfall) / Pentair DE filter / AquaLogic control / Polaris cleaner aka "Trackie" / Dallas, TX

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    Patrick_B's Avatar
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    Jun 2011
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    Re: Retaining Wall Cleaning

    Those two things will react and neutralize each other. Is it the Green you are trying to remove? If so, I would soak with diluted bleach to kill it, then and rinse/powerwash it off.
    TFP Moderator
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    Re: Retaining Wall Cleaning

    Oxyclean and a pressure washer worked great!


    26,000 gal / in-ground SWG (Hayward T-CELL-15) / Blue Granite PebbleSheen / 2hp WhisperFlo pumps (main), 1.5hp WhisperFlo pump (waterfall) / Pentair DE filter / AquaLogic control / Polaris cleaner aka "Trackie" / Dallas, TX

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    JoyfulNoise's Avatar
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    May 2015
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    Tucson, AZ
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    Re: Retaining Wall Cleaning

    Oxyclean is a mixture of sodium percarbonate, sodium carbonate and some perfumes/etc. The percarbonate supplies the peroxide which is a bleaching/oxidizing agent and will definitely kill that moss (chlorine bleach works better). But here's the kicker....it's going to grow back. You need to kill it really good (*cough* *cough* bleach! *cough* *cough*) and then, you need to seal the stone. If you don't seal the stone, the moss will simply grow back again. But, as long as you don't mind the annual cleaning, you can leave it as-is....

    *cough* *cough* ... use bleach .... *cough* *cough* .... dang pollen allergies.....
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

  5. Back To Top    #5

    Join Date
    Jan 2014
    Location
    Dallas, TX
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    69

    Re: Retaining Wall Cleaning

    I power washed it too. Next year bleach!


    26,000 gal / in-ground SWG (Hayward T-CELL-15) / Blue Granite PebbleSheen / 2hp WhisperFlo pumps (main), 1.5hp WhisperFlo pump (waterfall) / Pentair DE filter / AquaLogic control / Polaris cleaner aka "Trackie" / Dallas, TX

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