Nearly every home on your street is showing signs of mold and algae growth. The black stuff is actually growing each day until the day you decide to hire a professional roof chemical cleaning company.
Pressure washing alone will not solve your problem. You can not kill the mold spores with just water. You must use a specialized chemical formula that is formulated to kill the spores and all other types of growth on your roof whether it may be a tile roof or asphalt roof.
What is the black stuff? That black algae growing on your roof or home is called Gloeocapsa magma. According to Wikipedia.com "Gloeocapsa magma is a species of cyanobacteria. Cyanobacteria are an ancient line of photosynthesizing bacteria, which photolyze water generating oxygen gas. Ancient cyanobacteria were ancestral to the chloroplasts of all plants on earth. Wikipedia"
Call our office today for a $50 discount off your roof cleaning service, 772-626-7159.