Roofs develop black stains caused by an algae called Gloeocapsa Magma. We will spray your roof with a cleaning solution to kill all organic growth. Our process is recommended by all shingle manufacturers to lengthen the life of you roof. Moss and lichen are very damaging to your roof as they lift shingles with growth and embed around the granules. After the service all growth and stains will be gone and rinsing will occur from future rains.