moss on roofI have a lot of moss on my roof due to having very large trees around my house. I power washed it last year, but it seems to have come back in full force. Trimming back the trees is pricey. I am looking for alternatives. I have had a few people tell me to install a zinc strip at the peak of my roof, and others have told me to sprinkle a bag of builder's lime over the moss. However, I cannot find a store with either of these items. Any other ideas, or should I just power wash it again?October 08 2009 - Lockport00YesReport a ProblemProblemSelect oneOffensive contentIrrelevant contentSpam (pure self-promotion)OtherDetailsYour emailPlease enter a valid email address.Submit CancelContent flaggedWe will review this content. Thanks for helping make the site more useful to everyone. To learn more, read Zillow's Good Neighbor Policy.We're sorry. This service is temporarily unavailable. Please come back later and try again.