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Raystown Roof Cleaning Central PA 1-800-236-0322 wrote:

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Hey Eric, moss is irritating because there aren't instant finished results,...but it doesn't really take that long for it to disappear once it's fried by the mix. I think the Sun does as much as the rain does in the aiding of it's disappearing. After it's already dead the Sun just bakes it and breaks it down more and it just flakes away,..and then rain helps break it up and wash it away as well.

I always find ways to do drive-bys to check these jobs out periodically. After some of the lichen covered roofs I've seen clean up,..I am pretty confident it disappears. But lichen can take a few months to completely go away sometimes.

Jeff

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  Yes, I like the satisfaction of instant results!  I always include in my contracts that moss and lichen may take 60 to 90 days to be completely removed because of their root system.  Fortunately, this job is close to my home so, I can get by ther often to check the progress.