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.
When comparing installation costs, asphalt is often less expensive upfront than concrete. Asphalt prices typically range from $7 to $15 per square foot, while concrete can range from $3 to $18 per square foot. However, long-term costs should also be considered. Concrete driveways generally last longer (up to twice as long) and require less maintenance, which can make them more affordable over their lifespan. While asphalt has a lower installation cost and is easier to repair, it requires more frequent maintenance, such as sealing, which can add up over time. Therefore, while concrete is more expensive initially, its durability may offset the cost in the long run.
The time it takes to pressure wash your driveway is mainly based on size (but your driveway’s material and condition also play a role). Small driveways can be pressure washed within an hour, medium within two hours, and large within four hours. However, this does not consider any prep time or time that sealing your driveway would take.
Filling small cracks in your driveway with patching material is usually the most affordable fix, costing about $2 to $3 per square foot. For larger damage, however, these repairs won’t last, so it’ll save you more to resurface or replace the driveway, depending on the extent of the issues.
Annually, or more if located in humid or heavily polluted areas.
The Chamita, NM homeowners’ guide to concrete driveway services
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