Bright Brothers Soft Soap kills moss completely. As you can see by the gray color, the moss is dead, and as the roots which are attached to the shingles deteriorate, the dead moss will fall off the roof over time. Bright Brothers of the Valley does it this way because forcing, scraping or power washing the moss off the roof may cause some damage to the roof.
Moss Before Treatment
Moss on roof
Moss After Treatment
Dead moss will fall off over time
Roof Before
Unsightly moss covers this roof
Roof After Treatment
The moss has been treated, and will fall off over time.