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The answer to how often you should pressure wash your house is the same no matter whether your siding is wood, metal, or vinyl. Plan to do a project like this once a year with occasional hand cleanings in between to remove unexpected dirt—like debris from an especially violent storm or droppings from birds flying overhead.

Much like wood siding, it can be dangerous to use a pressure washer on composite siding. While normally durable, composite siding isn’t made to stand up to higher pressure settings. It also makes it very easy to damage the paint or finish on the siding. Some professional power washing companies may take the job on, but we recommend avoiding it, especially as a DIY project with a rented pressure washer.

It’s important to avoid power washing your house during freezing temperatures because the excess water can freeze on surfaces and cause damage. You should also avoid doing this task during heavy wind or rain because the water spray becomes less effective and could spread debris. Don’t power wash your home if your siding is cracked, loose, or peeling because the high pressure can worsen the damage. Lastly, if your home has delicate materials like softwood or stucco, consider gentler cleaning methods to prevent structural harm.

For pressure washing a driveway, a PSI (pounds per square inch) between 2,000 and 3,000 is recommended for both concrete and asphalt surfaces. A pressure of 3,000 PSI is ideal for deep cleaning without causing damage, effectively removing debris, dirt stains, and even oil spills. If your pressure washer has a lower PSI rating, you can still use it, but the cleaning process will take longer. For a more efficient and even clean, consider using a surface cleaner attachment.