Try using a long handled brush and be careful when walking atop your roof.
How to get moss of roof tiles.
Before applying a moss remover cleaner use a scrub brush 3 15 the home depot or a long handled soft bristle brush to gently scrape or pluck moss from the roof shingles or tiles.
Use the tool to gently lift away matted moss that has gathered on the flat sections of the shingles.
It s actually a combination of algae and fungi living together.
Carefully place a ladder near the area of moss growth and don slip resistant shoes old clothes rubber gloves and eye protection.
In the seams use the sharp edge of the scraper like a dental pick to force out the moss.
You could replace all the roofing with new shingles dark enough to disguise the staining or with shingles laced with copper granules which are lethal to algae.
Lichen isn t a plant.
The less expensive solution is to spray wash the roof with a 50 percent mix of water and bleach to get rid of the algae.
In fact it s not even a single organism.
Climb up to the roof and begin scraping off dead moss from the shingles using a putty knife or painter s 5 in 1 tool and working from the bottom up.
Applying moss killer is an obvious removal option but be aware that these chemicals have the potential to contaminate the groundwater.
A north facing roof usually has little sunlight which enables moss to buildup on the roof.
Hose off and brush all moss loose from your roof shingles.
Moss can grow quite quickly and it will grow in between roof tiles filling in the voids and lifting up roof tiles and slates.
Packing out any gaps and plugging the spaces.
And on your roof it usually looks like a green crust that grows in patches.
Cleaning moss off roof tiles is generally best done as soon as possible before this soil has a chance to gather.
Work on one small section at a time which allows you better control of the brush and your scrubbing motions.
Moss can be removed from roof tiles by gently brushing it off if the growth is not too severe.
But that would only make sense if the shingles were worn out.