Fortunately removing moss is a fairly simple task that you can perform on a seasonal or as needed basis to keep your roof weathertight and great looking.
Moss roof remover.
Use a solution of bleach vinegar or dish soap for this.
If the water will not reach the peak of the roof from the ground you can spray while standing on a ladder.
Using bleach is recommended by most shingle roof manufactures and the arma asphalt roofing manufactures association.
Even so you will always need to mount the roof later on in order to remove the dead moss.
The most effective method of cleaning algae and moss from a roof is with a 50 50 mix of laundry strength liquid chlorine bleach and water.
When the moss is dead scrub it off then install zinc flashing to prevent more moss growth.
Moss growing on a roof lifts the shingles and allows water to seep underneath and rot the roof deck.
To remove moss you first have to kill it.
6 to kill existing moss and lichen make a cleaning solution of equal parts bleach and water.
4 apply a dab of sealant to every nail head and run a bead of sealant under each shingle.
Work on one small section at a time which allows you better control of the brush and your scrubbing motions.
3 secure the strip with roofing nails.
5 continue installing zinc strips across length of roof end to end leaving a 1 8 in.
Space between the strips.