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Thread: First brick wash job, heavy black mold

  1. #1
    Jr. Member
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    First brick wash job, heavy black mold

    I have a customer who wants me to wash his patio and brick wall. Wall has a heavy layer of black mold. Should I DS a heavy house wash mix for this or use my roof pump and use a strong roof mix for this? Then I'm assuming hit it with a high pressure fan tip? Don't know why my pics keep getting attached sideways, maybe someone could also chime in on the too Thank you

    image1.JPG
    Mark Johnson
    Pro-XCL, LLC
    Winston Salem, NC
    proxclinfo@gmail.com

  2. #2
    That depends alot on what's in your house wash mix. Meaning what strength SH you use. If its 10-12% then DSing a strong housewash mix with a good bit of surfactant should get it done

  3. #3
    Jr. Member Hydro-Works's Avatar
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    Dec 2014
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    Clemmons, NC
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    What bulletproof said. Be mindful of too high of pressure on the mortar though. Depending on it's age/condition it could be damaged easily. Good luck!
    Robert Tilley, Owner
    Hydro-Works, LLC
    Clemmons, NC
    336-971-2757

  4. #4
    Mark, that's black algae on the brick. By no means am I trying to step on Vincents toes however, don't waste your time trying to downstream the brick. Hit it with a medium strength roof mix. If the area isn't too large, you can use a pump sprayer. If it's a large area, break out the dedicated pump!

    You want to wack it in one to two applications. Not three to five. When you go to rinsing, don't kill it with high pressure. You can run a high pressure tip however, keep back some so you don't kill the mortar.

    With applying the right mix, that should be a very easy wash job!!!

    Make certain to pre-wet any vegetation in the adjacent area.

    Mike
    Michael Heward
    Coastal Cleaning Service
    Serving Central and Southern Anne Arundel County
    Millersville,MD.
    www.coastalcleaningmd.com

  5. #5
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    Thank all of you so much for the responses!! All very helpful!
    Mark Johnson
    Pro-XCL, LLC
    Winston Salem, NC
    proxclinfo@gmail.com

  6. #6
    Jr. Member ambtink's Avatar
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    West Deptford, NJ
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    Mark when I have had brick walls in past i would use pure SH in a bucket with a good soap and brush it on. Do one application and ket it sit. Hit it with a second application and wash it off. Just my 2 cents! good luck
    Tom
    Water Boy Pressure Washing
    West Deptford, NJ
    609-932-0595
    www.waterboypressurewashing.com

  7. #7
    Turbo nozzle and call it a day.
    Then a mild sh after to kill the spores if necessary


    Sent from my iPhone using Tapatalk

  8. #8
    Incorrect method above!!! You need to kill the black algae before removing it.

    Otherwise, you will spread the algae all over the place... Afterwards, you won't need the high pressure from a turbo nozzle!!!

    Trying to insert two images, this brick walkway was Pretreated with a medium roof mix and rinsed using 1400psi. Zero damage and all of the black algae was killed off before removal...

    Mike
    Attached Images Attached Images
    Michael Heward
    Coastal Cleaning Service
    Serving Central and Southern Anne Arundel County
    Millersville,MD.
    www.coastalcleaningmd.com

  9. #9
    I agree that DS'ing won't touch it. Like Tom, we use straight 12% when we can (no surrounding landscape and controlled runoff)

  10. #10
    Jr. Member
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    Michael, those images are great! Thank you again for all the feedback!
    Mark Johnson
    Pro-XCL, LLC
    Winston Salem, NC
    proxclinfo@gmail.com

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