What Happens If You Never Clean Your Roof?
Published on: 04/12/2026
Learn how roof algae, moss, and black streaks can trap moisture, shorten shingle life, and hurt curb appeal on Hudson Valley homes if left untreated for too long.
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Learn how roof algae, moss, and black streaks can trap moisture, shorten shingle life, and hurt curb appeal on Hudson Valley homes if left untreated for too long.

Black streaks on your roof are usually algae. Learn what causes them, how they affect roof life and curb appeal, and why soft wash roof cleaning is the safest fix.