We use a custom made softwashing system comprised of multiple solution tanks and "low pressure" pumps to clean and rinse at minimal pressures. There are no pressure washers used in our softwashing rigs. Our cleaning solutions are comprised of mildew-cides, algae-cides, soaps, & surfactants. These solutions are mixed on-site and to the specific needs of the surface to be cleaned. First, the solutions are applied thoroughly to the surfaces targeted and given time to kill the mold, mildew, algae and fungus deep at its roots. Then, we rinse the surfaces thoroughly with fresh water at garden hose pressures. We take great care of all plants and landscaping by thoroughly wetting them down and or covering them with plastic when necessary. Many companies claim to softwash surfaces. Make sure the company you choose has the experience & proper equipment to do the job safely.