An expert shares the tools you'll need and the best methods to follow.

By Sara Dickinson
July 08, 2020
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Getty / John Coletti

Your home's exterior is exposed to sun, wind, pollutants, dirt, and even bugs and animals. These elements take their toll: Over time, you'll notice that your siding, deck, or driveway has become discolored or damaged. Luckily, there's a solution. Power washing your house is an easy way to boost its curb appeal, prime surfaces for painting, prevent damage, and bring the façade back to its original glory. To help you do just that, we asked Lowes Project Expert Hunter Macfarlane to share exactly how to power wash your house.

Purchase your tools.

You may think that you need to hire a professional to power wash your house—and depending on the size of the job, you might want to do so—but Macfarlane assures us that this is a task most homeowners can tackle. To get started, here's what you'll need: a pressure washer, a hose, some form of eye protection, detergent, and drop cloths. Whether you decide to purchase or rent the necessary equipment (that's an option, too!), carefully read the documentation that comes with your machinery to ensure it's the right power washer for your home. "Take the time to learn how to set up your machine and how to select the correct spray pattern," Macfarlane says. "Settings often vary by detergent application or high-pressure cleaning."

Check your paint type.

Before you begin power washing, avoid a potential health risk by checking that your exterior is not covered in lead paint; applying forceful pressure can break up and spread pieces of this paint, which would be be harmful to your family. If you think your home might have a lead-based paint, Macfarlane recommends buying a test kit or working hiring a professional for an inspection.

Do the prep work.

Prep your work area by making sure all doors and windows are closed; it's also important to turn off the power to external electrical outlets, which should be covered with tape and plastic. Trim back plants and shrubbery that might get in the way, too. "Once you've prepped the area, start by testing the high-pressure spray on an inconspicuous spot to make sure the setting does not damage the exterior surface," Macfarlane suggests.

"Cleaning tough stains and grime on your home exterior may first require a detergent—you'll use a low-pressure spray pattern to apply this," he continues. If you use a detergent, let it sit on the surface for a few minutes and then work the pressure washer from top to bottom in small sections. If you have a two-story home, Macfarlane recommends getting spray tips and extensions to make sure you can reach the areas that are higher up.

Avoid windows and vents.

Keep in mind there are some areas you'll want to avoid when power washing your house. "Regardless of the type of exterior you're cleaning, avoid getting detergent or water behind the outer surface," Macfarlane explains. "Keep the high-pressure spray away from windows and exterior vents." He also advises standing on a stable surface and wearing safety protection equipment; never leave the spray gun unattended while the power washer is running, he adds.

Get yourself on a schedule.

How often should you give your home's exterior a deep clean? According to Macfarlane, you shouldn't need to power wash your house more than twice a year—but there is one spot in particular to keep a close eye on. "The northern exposure of a home is more prone to a buildup of moss and lichens because the area receives less direct sunlight, which may need more frequent power washing," he says.

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