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Chlorine Bleach. Simply pour over the moss, wait a day or two and it will come right up without damaging the shingles. You can even sweep it off with a broom. Since the bleach won't react with the asphalt in your shingles, it is perfectly safe to use.

I have used a product called moss off. It comes in a sprinke can & you sprinkle it around the ridge of the roof. Then next rain activates it and the runs down to cover the roof. Works pretty good & its not too expensive

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Q: How do you kill moss on your roof without damaging the shingles?
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