Quote:
Originally Posted by Bilyclub
We had our roof cleaned a year or 2 ago under the house warranty provided by the shingle maker. Our roof is still in one piece and clean.
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Many of the Certainteed shingle roofs came with a 10-year algae warranty. They will clean it for free, even if you are not the original owner. I also had mine cleaned. But, Roofmax is an oil-based product that Certainteed does not endorse and using it will void the Certainteed shingle warranty.