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  • I have a moss problem on the roof. Does anyone know if its something I can power wash off or is it a scaffold and then clean up job? Or can I just leave it?

  • The cheapest passive option is to lay a length of 3mm copper wire along the ridgeline above any mossy areas. When it rains it'll oxidise and wash a copper solution down the tiles, which kills moss spores. That should stop it spreading at least.

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