Using copper to stop moss
First clean the roof with a pressure washer by starting at the top of the roof and working your way down. Thoroughly scrub any moss prone areas with a push broom, and thoroughly rinse off the roof. Then install zinc strips around the peak of the roof and nail every 12’’ with galvanized roofing nails zinc is a mineral that impedes moss growth and works way better than copper. After you applied the zinc strip apply a generous coating of zinc sulfate onto your roof, using a garden sprayer. The roof must be dry before the application and do not rinse the mixture off your roof repeat this every two years and you should have a nice clean roof.