Should I Power Wash My House Before Painting?

You may be wondering if you should power wash your house before painting them as you want to change the look of the outside of your home. Power washing is a great way to get rid of mold, dirt, and other filth that can make it hard for paint to stick to the surface. 

To keep from damaging things, it’s important to be careful when using this strong cleaning method. You can hire a pressure washing company to make sure the job is done safely and effectively, but you can also do it yourself if you know how to use power tools. 

You can choose the best way to clean the outside of your home by learning about the pros and cons of power washing, as well as the best way to do it.

The Benefits of Power Washing Before Painting

Power washing your home’s exterior before painting provides several key benefits:

Powered By BEdigitech

  • Removes Dirt and Grime: The high-pressure water from a power washer can blast away built-up dirt, mold, mildew, and other debris that has accumulated on the siding. This gives you a clean, smooth surface for the new paint to adhere to.
  • Improves Paint Adhesion: Painting over a dirty surface can prevent the paint from properly bonding, leading to issues like peeling, cracking, and an uneven finish. Power washing creates the ideal conditions for the paint to stick well and last longer.
  • Enhances Appearance: A freshly power washed exterior will look brighter, more vibrant, and freshly renewed, making the new paint job look its best.
  • Extends Paint Lifespan: By removing the contaminants that can cause premature wear and tear, power washing can help your new paint job last 7-10 years rather than just 3-4 years.

Preparing to Power Wash

Before you get started power washing your home’s exterior, it’s important to take some important safety precautions:

  • Wear appropriate protective gear, including safety glasses, sturdy shoes, and gloves.
  • Cover up any plants, fixtures, or other items near the walls that could be damaged by the water spray.
  • Practice using the power washer in an open area first to get a feel for how to control the water pressure and nozzle.

It’s also a good idea to work in small, manageable sections rather than trying to power wash the entire house at once. Apply the cleaning solution from the bottom up, then rinse from the top down. This helps prevent dirty water from running down over freshly cleaned areas.

Choosing the Right Cleaning Solution

The type of cleaning solution you use with your power washer can make a big difference in how effectively it removes dirt and grime. A good basic option is a mixture of bleach and water, with a ratio of about 1:10.

You can also add a few ounces of a mild, ammonia-free dish soap per gallon of the solution to help cut through grease and oil.

Avoid using harsh chemical cleaners, as these can potentially damage plants, landscaping, and the siding itself. Stick to gentle, biodegradable products that won’t harm the environment.

Allowing Time to Dry

Once you’ve finished power washing the exterior, it’s crucial to give the walls ample time to fully dry before attempting to paint. Depending on weather conditions, this can take anywhere from 24 to 48 hours.

Painting over a damp surface can trap moisture, leading to issues like bubbling, blistering, and mold growth under the new paint. So be patient and wait until you’re certain the siding is completely dry and ready for the next step.

Maintaining a Clean Exterior

After all your hard work, power washing and painting, you’ll want to keep your home’s exterior looking its best for as long as possible. Here are some tips:

  • Spot clean any new dirt or grime buildup right away using a mild detergent and a soft-bristle brush.
  • Conduct a full power wash once a year to remove accumulated debris and extend the life of the paint.
  • Keep the roof and gutters clear of leaves, sticks, and other debris that can eventually make their way down to the walls.
  • Repair any cracks or damage to the siding promptly to prevent moisture intrusion.

With a little ongoing maintenance, you can enjoy your freshly revived home exterior for many years to come.

DIY or Hire a Professional?

Deciding whether to tackle power washing yourself or hire a pressure washing company like Grime Busters, depends on a few key factors:

Skills and Experience

Power washing requires a certain level of know-how to avoid damaging the siding. If you’ve used a power washer before and feel confident in your abilities, a DIY approach may be feasible. But if you’re new to this tool, it’s generally safer to hire an experienced professional.

Time and Effort

While renting a power washer can save you money compared to hiring a pro, it also means taking on the time and effort required to do the job yourself. Professionals can typically complete the work faster and more efficiently.


Depending on the size of your home and the complexity of the project, hiring a pressure washing service may not be significantly more expensive than renting the equipment yourself. Pros generally charge $25 to $100 per hour, while a rental can run $35 to $175 per day.


Power washers can be dangerous if not used properly, potentially causing injury or damage to your property. Hiring an insured and experienced professional helps minimize these risks.


Power washing is often an important first step in getting the outside of your home ready for a new coat of paint. This high-pressure cleaning method can get rid of the grime, dirt, and other impurities that can make it hard for new paint to stick properly and last as long as possible. Make sure to be careful, use the right cleaners, and give it enough time to dry before painting.

So whenever you’re wondering if you should power wash your house before painting, you’ll know the options now. Power washing is an important part of making sure the outside of your home looks great for years to come, whether you do it yourself or hire a power washing company to do it for you. You can improve the look of the outside of your home and enjoy the benefits of a beautiful painted exterior for a long time with a little planning and the right method.

Leave a Comment