We are often asked by our customers here in Tampa, if Algae Resistant Shingles are effective, in keeping a roof clean.
Asphalt Shingles are made Algae Resistant by a patented process developed by the 3M Company.
Copper granules are embedded in the shingles. When water from Dew contacts the Copper, it leaches down the roof, slowly killing algae and bacteriological growth, and prevents roof cleaning.
This is what is claimed anyway.
Our experience is this, Algae Resistant Shingles do get dirty (we clean them here in Tampa all the time). However, they do seem to prevent the growth of Algae a few years longer then non algae resistant shingles.
Eventually, the heat and humidity here in the Tampa Florida area makes roof cleaning necessary, even for algae resistant roofing shingles.
If you have these algae resistant shingles on your roof, we may be able to assist you in getting your roof cleaned under warranty, for FREE !