[Shop-talk] Moss removal from roof?

[cornerexit]

I live in the pacific northwet and get a lot of moss on my composition roof
in the slots between the shingles (see picture in link). A pressure washer
of sufficient power is effective at removing this stuff but I don't like to
use one as it accelerates wear on the composition shingles.

 

Are there effective moss chemicals that will breakdown the moss to the point
where it can be brushed out of these slots with a stiff brush/broom, and
then use a blower or low pressure hose to wash the debris down the roof?

 

Thanks

Wayne

 

http://jacksonii.smugmug.com/photos/363663045_L2NJ8-M.jpg