The cost depends on the size of your roof the amount of moss and the labor rates in your area.
Green mossy things on my roof.
Moss on a roof begins with a thin dusting of green that you may notice only from low angles.
A more common type of growth on roofs is of course moss.
As a rule of thumb professionally removing moss will cost about 5 of what it would take to replace your roof altogether.
Roof moss and lichen are not only unsightly but can damage the roof over time.
Use a solution of bleach vinegar or dish soap for this.
These are probably not good things for your composition shingles.
When the moss is dead scrub it off then install zinc flashing to prevent more moss growth.
This thin layer on the top of the shingles expands and becomes wide thick and mat like.
If you notice green white or gray spots on your roof moss and lichen are likely the culprits.
Identifying removing preventing algae fungus lichens moss on roof shingles.
The third most common type of growth on a roof is algae.
Photos and text guide diagnosis of asphalt roof failures how to identify and explain roof shingle failures obtain claims.
Asphalt roof shingle defects.
Here we discuss the causes of algae moss lichens or fungal growth on roof shingles the effects of these conditions and how to cure or prevent them.
Moss is darker green much thicker holds more water and also grips into the surface of the shingles.