We’re re-roofing our house with Certainteed XT-25 shingles and trying to decide if we should get the algae-resistant version. Our roofer says the AR version is an extra $500. He doesn’t really recommend the AR shingle because it is warrantied against algae for 10 years and usually algae develops after that point.
We live in the Washington DC area and on a fairly shady lot. There is a small areas of green on our existing roof but we don’t know how old the roof is (we’ve only lived there a year).
I’m looking for input on whether the AR shingles actually are algae-resistant, whether that’s important, and if it’s worth an extra $500. Thanks in advance for any responses!