RealLifeDIY on MSN
If you see black streaks running down your roof shingles, here's what they're telling you
Those dark stains aren't dirt — they're alive and eating your roof.
QDEAR TIM: My roof needs cleaning. It's a newer asphalt shingle roof, but parts of it are covered with moss, lichens and algae. Is a pressure washer a good tool for cleaning roof shingles? Will it ...
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