Welcome guests with confidence knowing your home’s exterior looks fresh and clean again, and enjoy the pride of coming home to a house that looks its best. A single pressure washing can bring that transformation back to your home.
3+ Years of Pressure Washing Experience
Gateway Power Washing is a full-service pressure washing company.
We handle everything from small residential jobs to large commercial cleaning projects.
Whether it’s a home, business, driveway, roof, or commercial property, Gateway Power Washing provides the equipment and experience to get the job done right.

We help homeowners restore the look of the surfaces that get the dirtiest over time.
Driveways and concrete
Sidewalks and walkways
Patios and pool decks
House exteriors (siding, stucco, brick)
Roofs and gutters
Fences and decks
Garage floors

Businesses rely on clean exterior spaces to create a professional first impression. We provide pressure washing for a wide range of commercial properties.
Parking lots and parking garages
Storefronts and building exteriors
Restaurant patios and outdoor seating areas
Loading docks
Dumpster pads
Fleet vehicles and work trucks
A lot of people have had pressure washing done before, but the results didn’t last or the job looked uneven.
That usually happens when the cleaning is rushed or the wrong equipment is used.
A lot of people have had pressure washing done before, but the results didn’t last or the job looked uneven.
That usually happens when the cleaning is rushed or the wrong equipment is used.
Clear scope and plan before work starts
Treats algae, mildew, and buildup before washing
Uses professional surface cleaners for driveways and large concrete areas
Adjusts pressure for siding, wood, and delicate surfaces
Cleans edges, corners, and detail areas carefully
Leaves surfaces evenly cleaned without streaks or “zebra lines”
Spray quickly without treating the buildup first
Leave streaks across driveways and sidewalks
Use the same pressure on every surface
Miss corners and detailed areas
Stains return quickly because they weren’t properly removed
When dirt and algae sit on surfaces for too long, they can cause more than just cosmetic issues.
Roof algae can cause dark streaking and shorten roof life
Mold and mildew can spread across siding
Oil stains can soak deeper into concrete
Slippery algae can make walkways unsafe
Regular exterior cleaning helps protect surfaces and prevent more expensive repairs later.
We keep things straightforward.

Tell us what surfaces need cleaning and we’ll provide a clear quote.

We use the right equipment and cleaning methods for each surface so stains, algae, and buildup are properly removed.

Before we leave, we make sure everything looks clean and that you’re happy with the results.

Sit back and enjoy a home that looks fresh, clean, and well cared for again.
Gateway Power Washing proudly provides professional pressure washing and exterior cleaning for homes and businesses throughout the area, including St. Charles, St. Peters, Cottleville, Weldon Springs, Chesterfield, Wildwood, Ballwin, Creve Coeur, Maryland Heights, Bridgeton, O'Fallon, Lake St. Louis, Wentzville, Troy, and Winfield.
Here's What Your Neighbors Say About Working With Us
Pressure washing uses a machine that pushes high pressure water through a hose and spray wand to remove dirt, grime, mildew, mold, grease, and debris from outdoor surfaces. The pump inside the pressure washer increases the water pressure, often reaching thousands of pounds per square inch, which gives the water its strong cleaning power.
A technician controls the flow using a trigger gun or spray gun, adjusting the spray pattern and nozzle depending on the surface being cleaned. This allows us to remove tough stains from concrete surfaces, siding, patios, driveways, gutters, and more without damaging the material underneath.
Yes, when it’s done properly. Different surfaces require different levels of pressure. For example, vinyl siding, wood, and vertical surfaces need a gentler approach than concrete surfaces or parking garages.
A professional pressure washing company knows how to choose the right pressure washer, nozzle, and spray pattern for each surface. We often test an inconspicuous area first to make sure the pressure and detergent are safe before cleaning the entire area. This process helps protect paint, siding, wood, and other materials while still removing mold, mildew, and built-up dirt.
In many cases, yes. Oil, grease, mildew, mold, and ground-in dirt can often be removed using the right combination of high pressure water, detergent, and the correct spray pattern.
For stubborn spots, we may use specialized tools like a surface cleaner or high pressure hose to focus the cleaning power where it’s needed most. Stains on driveways, garage floors, or parking areas often come from years of build up, but pressure washing can make a huge difference in how clean those surfaces look again.
Both methods use high pressure water to clean surfaces, but there is one key difference. Power washing uses hot water, while standard pressure washing uses cold water.
Hot water can help break down grease, oil, and heavy grime more quickly. Pressure washing with cold water still has strong cleaning power and works very well for most residential surfaces like siding, patios, decks, fences, and sidewalks.
A regular garden hose simply doesn’t produce enough pressure to remove tough buildup. Even with a spray nozzle attached, a garden hose cannot reach the pounds per square inch needed to remove mold, mildew, grease, or deep dirt from concrete and siding.
A pressure washer uses a pump and high pressure hose to create far more cleaning power than a garden hose. That added pressure allows the machine to wash surfaces quickly and effectively, making it a real game changer for outdoor cleaning projects.
It can if the wrong pressure washer or spray pattern is used. Too much pressure in one spot can strip paint or damage wood.
Professionals adjust the spray wand, nozzle, and water pressure depending on the surface. Softer materials like wood decks or vinyl siding require lower pressure, while harder surfaces like concrete or parking garages can handle stronger cleaning power. Using the correct equipment and technique helps protect the surface while still removing dirt and mildew.
Most homes benefit from pressure washing every 12 to 24 months. Over time, dust, mold, mildew, and grime slowly build up on siding, patios, and driveways.
Regular cleaning helps remove that buildup before it becomes harder to remove. It also helps protect siding, paint, wood, and gutters from long-term damage caused by mold and moisture.
Pressure washing can dramatically improve the look of your home or business.
Gateway Power Washing provides reliable service and professional results you can see immediately.

Gateway Power Washing provides professional exterior cleaning services in Saint Charles, O’Fallon, St. Peters, Wentzville, Lake St. Louis, and surrounding Missouri areas, specializing in driveway cleaning, house washing, patios, sidewalks, and commercial pressure washing.
Other services: Driveway Pressure Washing • House Washing • Patio Pressure Washing • Deck Pressure Washing • Gutter Cleaning Service • Roof Cleaning Near Me • Fence Pressure Washing • Garage Cleaning • Dumpster Pad Cleaning • Truck Fleet Washing
© 2026 Gateway Power Washing. All Rights Reserved.