How often do you wash your roof?
Got up there today and gave it a good scrubbing then scrubbed the rest when I got down. Truth be told I haven't wash it since I bought it in 2013. Once a year? Twice? How many?
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At least 2X per year unless we are in a real dusty area, or sitting under trees. It would need it more often then to avoid black streaks from all the gunk.
