Moss, algae, mold, and mildew can grow between roofing tiles, causing those shingles to become loose, so they’re more likely to blow away in a storm. A high-pressure roof cleaning may not effectively remove this debris, as pressurized water only blows away their vegetation, without killing their spores!
Soft wash roof cleaning chemicals are designed to remove biological materials, including the spores of moss, algae, and other such contaminants. Having a soft wash roof cleaning for an Ann Arbor home means less risk of that moss, algae, mold, mildew, and other irritants growing back over the years.