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Not pressure washing your driveway can lead to several consequences that affect both its appearance and its structural integrity over time:  

• Reduced Curb Appeal: A dirty driveway covered in grime, stains, and mildew detracts from your home's overall appearance.  

• Safety Hazards: The buildup of algae, moss, and mildew creates slippery surfaces. When wet, it increases the risk of slips and falls for you, your family, and visitors.  

• Structural Damage: Dirt, debris, and organic growth can trap moisture against the driveway's surface. In colder climates, this moisture can freeze and thaw, leading to cracks and deterioration of the concrete or asphalt.

You should avoid using a pressure washer on any surface or item that could be damaged by the high-pressure spray, as some materials are too delicate to withstand the force.

Key items and surfaces to avoid include:

• Electrical Components: Never pressure wash electrical systems, as water can cause short-circuits and create a safety hazard. This includes utility meters, breaker boxes, electrical outlets, generators, and HVAC or air conditioner units.

• Delicate and Fragile Materials: Fragile items can crack, shatter, or be stripped by the pressure. Avoid pressure washing windows, glass, light fixtures, shingled roofs (especially asphalt), and stucco.

• Painted, Stained, or Sealed Surfaces: Unless your goal is to strip the finish, do not pressure wash painted surfaces, stained wood (like decks), or anything with a protective seal that could be stripped away. Be especially cautious with older surfaces that may contain lead paint.

• Soft Woods and Certain Decking: Delicate surfaces like softwood, composite decking, and antique or wooden patio furniture can be etched or damaged. If you must wash wood, use a lower-powered pressure washer with a wide-angle nozzle to prevent damage.

• Living Things: Never use a pressure washer on people, pets, or plants. The force can cause serious injury and will destroy landscaping.

Pressure washing your home or fence can make a major difference in the appearance and may even help extend the life of the structure you’re cleaning. Some of the most common areas that people pressure wash around their property include:

• Driveway: $100–$250

• Patio: $100–$200

• Fence: $150–$300

• Gutters: $50–$150

• Roof: $450–$700

• Siding: $150–$1,400

• One-story house: $150–$750

• Two-story house: $400–$1,400

• Three-story house: $700–$1,800

Whether you need to winterize your pressure washer depends on where you store it. If you can keep it in a relatively warm place with no risk of freezing, you won't need to add antifreeze. However, if the machine will be stored in freezing temperatures, any liquid left in the water pump can freeze, expand, and cause severe damage. To prevent this, add antifreeze to keep it in good condition. While some suggest emptying the machine with compressed air, this can be a tedious process that may not fully drain the liquid. Regardless of storage conditions, it is also good practice to empty the gas chamber and refresh the oil before winter storage.