If high pressure water is aimed near any damaged or missing roof tiles you will end up causing more damage than the moss ever did.
Moss on roof tiles damage.
Moss on roof tiles can cause multiple problems such as wood rotting and the obstruction of drainage points.
Moss absorbs and retains water.
Without any protection your shingles will warp and crack in the sun significantly shortening their lifespan.
Ultimately moss growth on a roof can result in costly repairs and can also reduce the lifespan of your roof.
However the greatest benefit of moss removal is on the gutters.
Moss alone cannot damage the tiles.
In addition the water trapped by the moss pools in gaps between your roof s tiles and as that water freezes and thaws it can pull the tiles apart causing even more damage.
If you remove moss from the roof then you will reduce the possibility of tiles suffering from winter cracks.
Once moss is removed there are less blockages and your gutters work more efficiently.
Moss damages your shingles in three significant ways.
First moss will strip away the protective oils on your shingles making them susceptible to erosion and sun damage.
Second moss absorbs water.