If you've been shopping around for exterior cleaning services, you've probably seen both terms thrown around. Most homeowners assume they're the same thing — they're not. Using the wrong method on your home can cause real damage. Here's what you need to know. What Is Pressure Washing? Pressure washing uses high-force water — typically 1,500 to 4,000 PSI — to blast dirt, grime, and buildup off surfaces. The cleaning power comes almost entirely from water pressure. It's fast and effective on...