• Hometalker
  • Leavenworth, KS
Asked on Apr 17, 2019

What's the quickest method to remove black streaks from roof?

BarbaraOlivaLinda Sikut


What's the quickest method to remove black streaks from roof without climbing up on it?

4 answers
  • Gathered In The Kitchen
    on Apr 17, 2019

    There are chemicals sold at your local hardware store that you can attach to the end of your hose and spray on your roof. I don't recall what it is called, but you can ask at the store. We have used it in the past with success. If the black streaks are really bad, you may need to get up on the roof with a push broom and loosen up the grime. Good luck!

  • Linda Sikut
    on Apr 17, 2019

    Hi Myrtha,

    That is very difficult to do. Many people think a pressure washer will work, but the problem is that a pressure washer will erode the pebbles in the roofing so that it will need to be replaced sooner and/or develop leaks. The black streaks are a combination of dirt and mold/mildew or defective shingles. We've had ours cleaned but always from someone who got onto the roof. I'd suggest getting several quotes from professionals if you don't know someone who can safely get on the roof. Wishing you the best.

  • Oliva
    on Apr 18, 2019

    You'll see immediate results, should you follow Linda's advice.

    You can use a garden sprayer and liberally apply Wet n' Forget as an alternative. You may have to ascend a ladder part way, to reach highest points. This method takes months, but is effective. Cover any ground plants nearby, before applying.

    Installing a ridge cover of copper or zinc should eradicate the streaks, as well.

  • Barbara
    on Apr 23, 2019

    Wet n Forget has a hose end sprayer kit now that claims to shoot 30 feet. Might save a trip to the roof.

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