Start on lowest row of shingles and work your way backwards to the upper part of the roof.
How to keep mold from growing on roof.
Spray the entire roof thoroughly.
Overgrown trees often spread bacteria onto the roof and cause algae growth.
Here are a few effective ways to prevent future growth once you have gotten rid of mold and algae.
You can t prevent spores of algae and moss or mildew from landing on your roof.
Obviously the best care is preventative care.
Trim trees near the home.
Prevent roof mold algae.
With regular cleanings you can get rid of the algae before it even becomes an issue and definitely before it gives way to rot mold and mildew.
Continue spraying until you see runoff then let the chemicals sit for 15 20 minutes to soak in and begin attacking the mold.
Make sure to plant trees far enough away.
Roof mold and algae usually grow because of moisture and bacterial growth.