Originally Posted by dmcjeep
All I can say is good luck. I had a reputable contractor do my roof a few years back and as it turned out the white shingles all started turning brown/black long before the warranty was up. To bad take some off and send them to the manufacture. Warranty ya pro rated and nothing to cover labor cost. What a joke of a warranty.
I thought the black discoloration on light colored shingles was a form of algae, I hit some dark spots on my old house with oxygen bleach, shit came right off.