Similar to Deb's response, I use cheap laundry detergent. I broadcast it over the areas with moss. It kills the moss and seems to help shed it from the roof. It is a lot better than some of the chemicals and does not harm plants or stain patios.What are the best 'substances' to apply to your roof to 'kill moss dead!' And how do you apply them?
I used something.. think it was called mossbgone.. comes in tube style can.. got a 4 pack at costco.. scattered it on the roof. Used all 4 for a 2000 sq ft roof.
Was first time I'd done it since buying the house 12 years before. It worked great. I live in the woods so lots of moss. Gotta be sure to clean the gutters a month or so later cause it can really wash all that junk down. I went up first and gently took off some thick moss by hand before treating but there was tons of it.
You dampen the roof before treating it and hopefully do it before a rain. (so it doesn't just blow off.) I may have lightly spritzted it with water just to start the action.
borax powder sprinkled on and then allowed to rain on or TSP.
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