If you remove moss from the roof then you will reduce the possibility of tiles suffering from winter cracks.
Is moss damaging to roofs.
Moss itself is harmless.
You should also consider that moss retains a great deal of moisture which may have a damaging effect to the roofs structure.
However the greatest benefit of moss removal is on the gutters.
The danger of moss lies in its ability to retain moisture.
Moss is different from algae lichen or mold fungi which are typically easier to clean and less damaging to a roof.
In wet climates moss commonly grows into a mat a few inches thick.
It does not produce any dangerous spores or fumes it contains no poisons or irritants and it lacks the mass to physically damage any structures including roof shingles.
While moss is the most common form of growth on your roof homeowners should also be aware of the spread of algae and lichen as well as the buildup of organic matter such as fallen leaves twigs branches and nuts which will support the buildup of moss.
Once moss is removed there are less blockages and your gutters work more efficiently.
A small amount of moss is harmless but if it s left untreated it can cause significant damage and degrade the structural integrity of your roof.
A lot of care should be taken when removing moss because cleaning a roof could prove just as damaging to it than leaving the moss on it.
Moss alone cannot damage the tiles.
If you are worried about this it may just be best to go ahead and remove the moss.
Left unattended moss can spread and cause all kinds of damage.
Roof treatment chemicals for algae lichens or moss may risk also damaging the shingles may corrode or discolor copper gutters or downspouts and if not rinsed off of flowers or shrubs or lawns it may damage these plants.
As i mentioned before moss typically grows in the cracks between each shingle.