What is the best way to clean or treat a roof with moss?

We recommend treating your roof for moss, lichen or black mould with a chemical roof treatment. Our chemical treatment is applied to the roof during dry conditions with light or no wind. Once applied it will kill the moss as long as there is no rain for at least 4 hours, The moss will then dried up. The rain, sun and the wind will weather it further to wash it from your roof over a 1 - 3 month period. If your roof was heavily infested a second treatment may be advisable in a further 12 months. This is the best way to remove moss.

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