What's required for house washing is mostly preparation on the homeowner's side: closing windows, moving outdoor furniture or vehicles away from the home, and ensuring outdoor power outlets are protected from water exposure. On the service side, professional house pressure washing relies on the right equipment, including low-pressure nozzles, specialized soft wash chemicals, and trained technicians who understand how to treat different siding materials safely. Because every home is a little different, an experienced provider will assess your exterior before starting to determine the safest, most effective approach for your specific surface type.