Roof algae eats away at shingles over time, and that's why roof cleaning services in Texas matter so much. They use gentle, low-pressure washing to remove algae and moss before they wear down the shingle surface. This keeps roofs lasting longer and saves homeowners from early, costly repairs. What's Really Damaging Texas Roofs? Most people think those dark streaks on a roof are just dirt. But that's not the case. There's actually living algae growing right on the shingles. Me