Eco-Friendly Roof Cleaning removes Black Algae, Lichen, Moss and other roof algae using Eco-Friendly products that are family and pet friendly. We have the most experience in the business. Also we offer a 10% discount to seniors and Angies' List members. All work is 100% GUARENTEED. Have you roof cleaned before you have to have it replaced ! Will NOT damage shingles, gutters, lawns, shrubs, or flowers. "Free Estimates". Residential or Commercial, Serving all of New England. Licensed and Fully Insured. RI Lic. # 2142.