You scrubbed that dark streak off your roof last spring, and now it's back again like it never left. Here's the thing most homeowners don't realize, those stains aren't just dirt you can wash away. They're algae, and they've got roots burrowing into your shingles. Every time you clean the surface, you're only removing what you can see. The spores stay behind, feeding on the limestone in your roofing materials. A Roofing Contractor Wimberley, TX will tell you that unless you treat the root cause, you're fighting a losing battle. Sometimes the damage goes deeper than cleaning can fix, and that's when you need a Siding Contractor Wimberley, TX to assess whether replacement makes more sense than endless scrubbing. Western Skies Roofing & Construction : https://www.google.com/maps?cid=9229191897320819968 Get the full story : https://socialytime.com/blogs/118476/Why-That-Roof-Stain-Keeps-Coming-Back-Even-After-You