Do you have mold on your roof? It is not really mold up there it is algae, specifically Gloeocapsa Magma. Cleaning roof mold requires the use of specialized tools and experience. The mold or algae will absorb moisture and keep the shingle or tiles surface wet.  This will speed up the loss of granules and wear & tear.  Once the granules are lost they can not be replaced.  This will … [Read more...]