Moss growing in the gutters and on your roof ruins the aesthetic appearance of your home’s exterior. It can also pose a serious threat. If moss growth isn’t dealt with, it will eventually weigh down the gutters, stop water from flowing freely, and dislodge or damage roofing shingles. Yes, it can be removed. But here are some tips to help prevent moss from taking hold in the first place.
On the Roof
Install copper flashing or zinc strips underneath the row of shingles at the top of the roof edges. Approximately a third to a half of the strip should be visible. To be effective, the metal strips should run along the entire length of the roof ridge. The rain interacts with the zinc or copper, then runs down the roof before entering the gutters. Zinc and copper molecules contain properties that are poisonous to moss, eliminating the potential for spores to spread.
Copper wire can also be used at intervals, starting at the top and ending three to five feet away from the gutters. Avoid nails or screws directly on roofing tiles; instead, place fasteners on the side of the roof.
When installing a new roof, consider purchasing asphalt shingles with embedded copper granules.
Near the Roof
Moss likes the dark side of your roof. Trim back trees that block out the sun. Since moss thrives in a moist and shaded environment, directing sunlight onto your roof and around the gutters will help to quickly evaporate water after a rainfall. Keep in mind that the north side of your home and other parts of the roof receive different amounts of sunlight from season to season. Areas prone to shade need to be inspected for debris buildup and damp spots.
Regularly sweep off the roof and muck out the gutters to prevent debris from piling up. When damp twigs, leaves, etc. hang around for any amount of time, it provides the ideal environment for moss spores. Standing water in gutter channels creates a number of problems, including moss growth.