Does Roof Algae Affect Shingle Lifespan? The Real Answer
Roof algae can shorten asphalt-shingle service life indirectly, but black streaks alone do not prove that shingles are being structurally destroyed. The main risks are retained moisture, accelerated granule loss, reduced drying, and progression to moss or lichen. A roof’s age, ventilation, climate, slope, and existing wear determine whether cleaning is worthwhile. Key facts at […]