[Shop-talk] Moss removal from roof?

[Obaa]

I use something called "Moss-X" (?); it comes in a green can similar to Ajax detergent and is commonly available at Home Depot and Lowes..  I think they also make a spray version.
The stuff works quite well, but takes a little while to kill it all off.
Once you have it all killed, you can install a zinc strip along the roof ridgeline.  It is a sacrificial strip, and will slowly leach in the rain.  It does a lot to keep moss from re-appearing, although you'll still need to clean the roof on occasion.

>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?