How to get rid of moss on your roof
Moss develops in perennially shady areas in areas that tend to be cool and damp. You can live in a cool, damp area, but sections of the roof that get a couple of hours of sun per day may not develop moss. It’s that third factor–lack of sun–that promotes moss growth.
Moss begins as a thin green layer on the tops of the shingles. The areas between shingles and the shingles’ edges also get moss because they are even more shaded.
As moss thickens, it will get under the shingles, acting like a jack and raising and pushing them upward. It’s bad enough with asphalt or composite shingles, but if you have wood shingles it’s disastrous. Wood’s porous surface is prime real estate for moss growth. Once moss has adhered to wood shingles, it’s tougher to get off than the relatively smoother planes of composite or asphalt shingles.
A few ways to get rid of moss on your roof is as follows:
1. Attach zinc strips to the ridge of your roof. Over time, as rain falls, zinc residue coats the roof, preventing moss-growth, if you are not comfortable climbing ladders or being on the roof, hire a professional.
2. Mix one part of water to one part of bleach. Use a pump sprayer to spray the application on the surface of the roof. If you are not comfortable climbing ladders or being on the roof, hire a professional.
3. Bayer 2-in-1 Algae and Moss Killer- You screw the end of your garden hose to the bottle, turn on the water, it has the power to spray a two story house roof from the ground. This is the best alternative if you do not want to get on the roof or hire a pro.