This customer has a roof that is very difficult to see from any point in or near their yard. The roof is about 10 years old and I think it was probably shocking to realize it had this much growth on it. The carpeted moss fortunately did not have rhizoids that attached to the roof, which allowed the majority of it to be removed with air. Interestingly, that moss provided an ideal environment for seeds to germinate and they were starting to root into the shingles...which is definitely not good. With over 36 varieties of moss, some grab onto the roof very strongly and some not so much. The white in the last photo is dead moss that has a very strong grip on the roof, even after a thorough rinsing, and it will continue to break down. It will slough off the roof over the upcoming weeks.