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I have a whole sub division that has shake shingles and a realitor that asked about cleaning them.  I understand that working on the roof will entail a different approach vs. asphalt. The question has to do with the solution to use? What works best for cleaning cedar/pine shake shingles and is there a different way to apply? I believe at one time these shingles in question were cedar, they are so stained it is hard to tell.

Would like to know any difference between pine vs. cedar for cleaning.

Thanks