Our experience in Florida has shown that conventional roof cleaning has been clearly lacking in solving the problem. In fact, it has compounded the problem by putting high-pressure water jets on tiles that were not designed to absorb this kind of pressure. This is why we developed a soft wash option that contains some bleach and my own proprietary mold inhibitor that kills all surface mold and imbedded mold spores, thus preventing mold from growing over time. We take great care in protecting plants and surrounding areas from any bleach damage.
With that said, the roof cleaning experience will be quick and will last for a good 2 years, while protecting the integrity of your roof.