What Is Pressure Washing? When to Do It and How It Differs From Power Washing

It’s time to put pressure on those dirty decks 

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  • Pressure washing uses a stream of highly pressurized water to blast away dirt, grime, and debris from your home's hard surfaces without heating the water.

  • Electric pressure washers cost $100 to $200, while gas models run around $500, plus $20 to $80 per gallon for eco-friendly cleaning solution.

  • Your pressure washer works best on cement, vinyl, or aluminum siding, concrete driveways, and unstained natural wood decks when you need deep cleaning power.

  • Hiring a local power washing professional removes the guesswork from safely cleaning your surfaces and helps you avoid damage from incorrect pressure settings or technique.

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When it comes to washing, water’s good, but water under pressure? Even better. Pressure washing uses a highly pressurized (but unheated) spray of water to blast tough messes off surfaces, including everything from dirt to old paint. Keep reading to explore the best uses of this impressive (pun intended) cleaning method and how it differs from power washing.

What Is Pressure Washing?

Pressure washing is any cleaning done with a pressure washer, which sends out a pressurized spray of water in a powerful blast. Basically, think of pressure washing as a supercharged hose.

The power of pressure washers is expressed in PSI, or pounds per square inch. A pressure washer with 2,000 PSI or less is useful for regular household tasks, while higher-powered pressure washers can get extra-dirty jobs done.

That said, if you have a serious mess, delicate materials that need a clean, or just want assistance on your project, a power washing pro near you can get the job done quickly without a mess or potentially costly mistake.  

DIY Pressure Washing Cost

If you want to DIY pressure washing, the machines are relatively affordable for homeowners to purchase and keep. You can buy an electric pressure washer for $100 to $200, though higher-powered gas models cost closer to $500 apiece. You’ll also spend $20 to $80 per gallon for an eco-friendly cleaning solution at your local home improvement store.  

Pressure Washing vs. Power Washing

 3 types of washers compared, with an electric pressure washer being affordable but not as powerful
Photos: Irina Shatilova / iStock / Getty Images Plus / Getty Images, cherrybeans / iStock / Getty Images Plus / Getty Images, OceanProd / iStock / Getty Images Plus / Getty Images

Now that we know what pressure washing is, what makes it different from power washing? Pressure washing is what we’ve described above (cleaning with a strong blast of water), but power washers create a blast of water and steam that’s highly pressurized and hot. 

In short, heat is the big difference between pressure washers versus power washers. Adding heat to the process makes power washers more effective at cleaning tougher messes, but it also makes them more dangerous to use and more liable to damage soft or porous surfaces. This is why hiring a pro for power washing is the safest and most effective move for your dirtiest surfaces. 

When to Pressure Wash

woman pressure washing wooden deck
Photo: coco / Adobe Stock

Because pressure washing is, well, high-pressure, there are several parts of your home you shouldn’t pressure wash. You can call a pressure washing company for more specific advice, but as a DIYer, avoid pressure washing the following:

  • Stained decks or those made with composite materials

  • Brick, stucco, or painted siding

  • Windows

  • Light fixtures

  • Electrical panels

  • HVAC units

  • Vehicles

On the other hand, pressure washing can help remove built-up grit and grime from hard, durable surfaces, such as:

  • Unstained, natural-wood decking

  • Siding made of cement, vinyl, or aluminum 

  • Concrete slab driveways and walkways

Again, if you have questions or don’t want to risk damaging your home, you can always hire a professional to help you get the job done right. After all, the water is supposed to be the one under pressure—not you. 

Frequently Asked Questions

Pressure washing is a great way to take care of built-up messes much more easily and quickly than manual scrubbing. Pressure washing can save you energy, time, and even money by getting rid of contaminants that can lead to damage to your home. It can also increase curb appeal if you’re getting ready to make a home sale.

The ideal frequency for pressure washing depends on the surface being cleaned and your local environmental conditions. For a home's exterior with siding that is safe to wash (such as vinyl, cement, or aluminum), a full wash once or twice a year is a good guideline to remove accumulated dirt, grime, mold, and mildew. You may need to wash more frequently if you live in an area with heavy rain or snow, near a dirt road, or if you notice excessive buildup. Other surfaces have different schedules; for example, a frequently used driveway may need cleaning more often, while outdoor patio furniture might only need to be washed every few years. Use your discretion based on how dirty the area gets.

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