DIY roof cleaning is dangerous and often ineffective. The safety risks of working on roofs, especially when wet from cleaning solutions, make this a job for professionals with proper equipment and training. More importantly, using the wrong cleaning methods or solutions can damage your shingles and void warranties. High-pressure washing, in particular, strips protective granules and can force water under shingles causing leaks. Professional cleaning costs far less than roof replacement or repair from DIY damage. You get guaranteed results, proper safety protocols, and protection for your property and landscaping.