If you want to prevent moss as best possible consider at least taking down branches over your roof if not cutting down the trees that are very close to your house.
Roofing materials that will not grow moss.
They are zinc and copper.
A copper zinc or a galvanized metal strip installed on the ridge of the roof can prevent the growth of moss algae and lichen.
The moss can then create a layer of algae lichen growth on your roof by collecting windblown soil and spores.
The strip will oxidize over time and wash down the roof plane when it rains making the roof plane much less habitable for moss algae and lichen.
Cut the limbs that hang from the roof or install stripe copper or zinc sling this ridge.
Algae algae is trickier than moss to prevent but some shingle manufacturers are making strides with copper composite.
It can take a good deal of time for the moss to grow around your roof.
Unlike algae and moss mold is not a healthy plant.
You can also prevent growing moss from your roof.
This not only prevents the growth of moss on the roof but also algae.
Roof mold can appear as black or brown blotches or slimy foul smelling accumulations.
As wind leads particles to your roof and leaves or twigs fall onto its structure the debris and other organic materials on your roof give moss the sugar and nutrients it needs to survive and grow.
Roof algae moss removal video watch this video for proof positive about how well copper works to keep algae and moss from a roof.
Install a metal strip.
This creates the perfect environment for moss to grow.
This microscopic bits of metal poisoned the algae and it simply would not grow.
The moss treatment is similar to the algae stain s treatment.
Each time it rained some of the copper or zinc washed down on to the roofs.
Two elements disrupt the ideal moss s environment.
The materials can provide your roof with the materials necessary to help moss grow all around.
To help eliminate moss these elements are cut into strips and nailed to the roof.
A moss s roots are rhizoids and can anchor the moss to your roof.
Shaded areas where the sun cannot evaporate all of the moisture on your roof provides the perfect region for moss to flourish.
Resist does not mean moss proof or lichens proof however for shingles subject to difficult conditions such as extensive shade under trees and lots of organic debris left on the roof surface.
New asphalt roof shingles are available with an inclusion of chemicals that resist moss lichens algae and even fungal growth.