Reader Recommendation Request: Roof cleaning/treatment

As a few more folks wander, stuffed, to the computer, we are sharing a WSB Reader Recommendation Request sent in a few days ago by David:

I sure could use some recommendations for roof cleaners and those who treat for moss prevention. … I have a tall house with a steep roof and it seems
difficult to find a company that deals with moss prevention/treatment. Ideally, I need someone to spray a moss inhibitor so that the more severe power-spraying/cleaning won’t be needed every couple years.

The House November 22, 2007 (9:48 pm)

I don’t know who will do it for you, but a 50/50 solution of Water and Oxi-Clean prevented moss on my roof for almost 2 years. I’d test it in a small area first to see if it dulls your roof though.