Source: http://www.thriftyfun.com/tf744895.tip.html

Black Streaks on Roof (Mold)

I have black streaks on the roof of my house, I understand this is some type of mold. I would like to know if anyone has any ideas on how to safely remove these black streaks? I was told that you shouldn't use bleach, a powerwasher or anything involving scrubbing the shingles since all of these solutions will ruin my shingles.

Debbie from New Jersey

Source: http://www.thriftyfun.com/tf744895.tip.html

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