How to Get Rid of Roof Algae Without Damaging Shingles

To get rid of roof algae, apply a roof-safe chemical treatment with a pump sprayer, allow the labeled dwell time, and rinse gently down the shingle slope. Avoid pressure washing, scrubbing, and upward spraying under shingle laps. The safest method depends on roof material, pitch, roof age, landscaping, and whether the algae has already damaged […]