Looking for roof cleaning services ? So, Kelanway is always ready to provide you this service. It’s roof cleaning solution contains a mildewcide that prevents mildew from growing back, to give your roof a longer lasting clean. When discussing the benefits of roof cleaning overall, it’s of equal importance to look into the methods used. High pressure roof cleaning will wreck your roof. Shingles are fragile, being composed of many thousand to tens of thousands tiny granules and, while pressure washing will remove some stains, it will also remove parts of your roof.