TOPIC: I Have An Existing Metal Roof and Have A Question
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Thank you Todd. We also have a pollen problem on a high pitch older green metal roof. Is it safe to pressure wash a colored roof? I don’t want to damage the integrity of my roof.
Penny, in addition to power washing, you could also try products such as RoofWash or Wet N Forget, or have it "soft washed" which is a lower pressure powder wash with cleaning agents. Whatever you do, try it on a limited area first to make sure the finish isn't damaged. There have been many types of paint finishes used on metal roofs over the years and I have no predictable way to know how yours will respond to various cleaning methods.
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