Remove moss from a shingled roof
There are two methods to keep the moss away:
1. Sprinkle the affected areas with a laundry detergent containing bleach granules.
2. Buy a roll of 10-cm (4 in.) zinc. Measure the roof ridge and cut a strip to match. Insert the strip under the ridge shingles on both sides so that 8 cm (3 in.) is showing. The oxidizing process of the zinc will continually coat the roof below and prevent moss from growing.