Houston's humidity grows a green film on anything that holds still: driveways, sidewalks, fences, patio furniture, and the north side of every house. Pressure washing takes it off in minutes, which is why every hardware store rents the machines. It's also why we get calls to repair what the machines did.
Concrete and brick pavers can take high pressure. So can most composite decking, though you'll want a fan tip and some distance. Those surfaces are where a pressure washer earns its keep.
Wood is different. High pressure on a deck or fence raises the grain and leaves permanent wand marks, so it needs lower pressure, the right cleaner, and a wider tip. Siding, stucco, and painted surfaces shouldn't be pressure washed at all in the usual sense. They need a soft wash: low pressure, a cleaning solution that does the work, and a thorough rinse.
Windows, window seals, and anything with caulk are the places to keep the wand far away. Water driven behind a seal ends up inside the wall. If you'd rather not learn all this the expensive way, it's a job we do all summer.