The warranty for GAF Elk's 'Algae Eater' shingles states that at their discretion, they'll either replace the stained shingles, or have them cleaned by a roof cleaner.
Roof Cleaning Northern Virginia (571) 250 9650 wrote:
Here's one of the warranty docs, this one for GAF 'Smart Choice' (not Algae Eaters) but it reads the same. Note that it's also pro-rated after a year.
Page two, top middle paragraph:
Found it ...Thanks Ted... It is nice to see cleaning listed on the warranty. From the way that warranty reads it looks like we still have Job Security!
It would be crazy to replace them when ya can just clean them. This was discussed before, about copper granule shingles or something. This thread was more informative.
After reading the warranty it makes one wonder if any actual home owners actually know that is an option or if they ever pursue it. I gotta ask has anyone here ever worked on a warranty job and if so how payment conducted. Does the home owner pay the cleaning crew and wait for reimbursement ?