Remove lichen, moss, and algae by washing your roof with low water pressure. This removes the unsightly black stains which is an algae called Gloeocapsa Magma, that feeds on the limestone which is contained in most shingles. By removing the algae, it removes the harmful effects of heat being trapped in the shingle which will shorten the life of the shingle. Lichen and moss eat into the limestone causing pox marks in the shingle, in turn shortening the life of the shingle. Washing your roof will astheticly and physically extend the life of the roof to it’s proper effectiveness.
Most homeowners believe their roof needs to be replaced but this is simply not the case. Save your money and save your roof. Your roof should last at least 25 years….