removing mold from patio stones?

15 Answers

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  • 2 months ago

    spray with lysol,kills mold & funguses

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  • ron h
    Lv 7
    2 months ago

    from a hardware store Lowes or HD, get some TSP cleaner (usually in the paint dept) and mix it with some bleach in hot (or warm) water. use a broom or brush to scrub what you can.  Rinse really well b/c bleach with make the stones really slock.

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  • Anonymous
    2 months ago

    Try the water hose with a garden nozzle first and blast the stones clean.  Sounds like moss.  It washes off.

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  • 2 months ago

    Do you mean mold or ALGAE? Which is not mold.  Algae is green--mold would be black. It can be removed with a product called Wet and Forget--which is just what it says--you spray it on and leave it. It kills the greenish algae that gets into stones, wood fences or decking and railings. If your stones are covered with thick green stuff--that's MOSS and you only need to scrape that off with a tool. They do make moss killers, but you don't need them. You can simply remove it and wash the stones with water after. 

    Stones usually don't mold. That's why I was asking. Bleach wouldn't be safe for the environment and it's not recommended for stone.

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  • Kate
    Lv 7
    2 months ago

    Bleach and hot water.

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  • 2 months ago

    Turn them over, and rinse with a hose.

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  • 2 months ago

    Scrub brush, vinegar, and a garden hose.

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  • 2 months ago

    High pressure water cleaning. You can get high pressure systems at Home Depot and similar large hardware stores. Simply spray the mold with the HP water and the mold will peel right off the stones and/or bricks.

    One word of caution (based on experience with my HP system), try spraying a small part of the patio especially in the mortar area between the bricks or stone. Sometimes the high pressure water will actually cause the mortar to break up.

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  • 2 months ago

    The fastest way would be to rent a pressure washer. Make sure it has a chemical injector. That way you can apply some bleach from a bucket and then use the pressure nozzle to easily remove all of it. In the video, the guy is using the chemical injector to apply the chemicals. If you have sand between the stones you may have to add more when you are done.

    https://www.youtube.com/watch?v=Gav7_plBuhw

    Youtube thumbnail

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  • Anonymous
    2 months ago

    Scrub with a mixture of baking powder and white vinegar.

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