Have you ever looked at your roof and wondered what those black streaks are? That is algae and moss growth that has developed over time. Yes, it may just seem like an unsightly annoyance. But this organic build-up can quickly develop into roof damage or cause shingles to blow off if left unchecked. How do we solve it? Per manufacturer recommendations a mixture of water, sodium hypochlorite, and a surfactant needs to be applied via pump up, 12-volt sprayer, or some type of lower pressure pump. This method of cleaning is the safest way to restore your roofs appearance but most importantly keeping your roofs warranty valid! Some tips we find helpful are keeping trees cut back from the roof and removing any debris that may accumulate on the surface.