You scrubbed that dark streak off your roof last spring, and now it's back again like it never left. Those black stains aren't just dirt that washes away with a hose. They're algae colonies that dig into your shingles and keep growing back because the spores are still there, even after cleaning. Most people don't realize that standard pressure washing can actually damage shingles and make the problem worse. A Roofing Contractor Wimberley, TX can treat the root cause with specialized solutions that kill algae at the source. Sometimes the damage goes deeper than stains, and you might need a Siding Contractor Wimberley, TX to check if moisture has spread beyond your roof. Prevention beats cleaning every single time. Western Skies Roofing & Construction : https://www.google.com/maps?cid=9229191897320819968 Read the full story : https://socialytime.com/blogs/118476/Why-That-Roof-Stain-Keeps-Coming-Back-Even-After-You