December 11


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How to clean aluminium siding with a pressure washer

aluminium, cleaning guide, siding


  • Makes your siding shine
  • Clean large areas quickly
  • Removes stubborn dirt like mold and mildew


  • Too much pressure can damage siding


Most people prefer aluminum siding on their houses or shop buildings. Of course, there must be some reasons for this. It offers more than practical benefits in its own ways. Aluminum siding features an appealing look, and you don't need to repaint or replace it for years. Notably, it requires little maintenance.

However, a hazy glaze of dust, mildew, and stains can cover your siding over time and dulls out the overall appearance of your house. That said, it's extremely important to pressure wash the aluminum sliding. Does pressure washing really work? Well, yes, but you need the best pressure washer for aluminum siding.

Can you power wash painted aluminum siding? 

Yes! A pressure washer leaves your aluminum siding sparkling clean. Luckily, these products are there to freshen it up. Without further ado, let's narrow down the top-rated pressure washers that will help you clean all of that stubborn stuff off.

Just keep in mind that high pressure washing can damage your siding, so always start low and gradually increase the pressure as required.

Here’s how we’d recommend you approach cleaning your aluminum siding with a pressure washer.

  1. 1
    Where appropriate clothing and safety gear, like boots and goggles
  2. 2
    Rinse off your siding using a low to medium pressure and a nozzle with an angle on it to help you get to those hard-to-reach areas
  3. 3
    Now add your detergent. Be sure to read you pressure washer guide and the information that comes with the detergent.
  4. 4
    Cover the siding with your detergent using a low pressure setting
  5. 5
    Wait a few minutes.
  6. 6
    Rinse of the detergent starting at the top of your siding. You can use a medium to high setting to do this. We recommend a wide nozzle for rinsing
  7. 7
    Ensure you’ve removed all the detergent and leave your siding to dry.

Here’s a few pressure washers that come highly recommended:


Sun Joe SPX3000


Simpson MSH3125

GreenWorks 1600


2030 PSI

3800 PSI

3200 PSI

1600 PSI

Gallons Per Minute





Tank Size

Dual 0.23 gallon

0.26 gallon

No Tank

No Tank

Length of hose

20 ft

19.7 ft

25 ft

20 ft







1# Pressure Joe SPX3000 Electric Pressure Washer

If you have a tight budget, Pressure Joe SPX3000 is an absolute steal. It's well-known for its versatility to tackle several cleaning tasks, including aluminum siding buildings, houses, patios, cars and lawn equipment, decks, and more. Equipped with dual 0.9 liter onboard removable tanks, the SPX3000 pressure washer can store different kinds of detergent to handle various cleaning projects simultaneously.

The power this model exerts comes from a 1800W motor. While you may want something powerful, the electric motor generates about 2030PSI at 1.76 Gallon Per Minute. This maximum cleaning power is presumably enough to tackle light-to-medium and most demanding cleaning tasks.

Thanks to its Total Stop System (TSS). The TSS automatically shuts off your pump whenever the trigger isn't engaged. As a result, the safety lock switch prolongs pump life and allows it to save energy.

Besides, the pressure washer is packed with the most essential accessories like two 0.9 L (30.4 ounces) detachable detergent tanks, a 20-foot pressure hose, and a 34-inch extension wand. Others include a power cord, 5 quick spray tips, and garden hose adapter. All these are useful in the action.

Additionally, the model is mounted on a two-wheel system to ease the use. Together with a carrying handle, you can effortlessly carry it anytime wheels fall off during operation. The Lightweight model gives you a chance to reach even secluded corners of your house.

Above all, Joe SPX3000 comes with a steel hose and steel Iance fittings rather than plastic. This offers a nice touch similar to the best pressure washers in the market.

Things we like

  • Can tackle different cleaning tasks
  • Lightweight feature makes it possible to reach even the top-most corners
  • The TSS auto-shutoff saves energy when the washer is idle

things we don't like

  • Many users consider it as a medium-duty and not heavy-duty model

2# TEANDE 3800PSI Electric Pressure Washer

Stuck at home, wondering how you can clean up your aluminum siding house to perfection? TEANDE 3800PSI Electric Pressure Washer is a top option that's worth considering. It's a workhorse when it comes to washing anything at your home.

With its 5-adjustable spray nozzles, the pressure washer can operate within different spray patterns and soap. As such, this creates variable pressures to perform different cleaning tasks. The soap bottle outspreads thick and rich foam over around to loosen grime and dirt.

Even better, it comes with a powerful motor that generates up to 3800 PSI using 2.8GPM for optimal washing power. Whether you want to take away dust from your house, cars, fences, sidewalks, patios, and more, this model will get the job done.

As an upgraded version, TEANDE is easy to transport around with wheels. Plus, built-in storage compartments neatly accommodate all components and keep the fitted power cord tangle-free. So, storage is a breeze!

Just like other top picks, 3800PSI has a Total Stop System (TSS) for easy application. It shuts off automatically when the machine isn't operating. It's equipped with protection features to enhance durability and safety for maneuverability.

You'll like its precision technology and aerospace quality. And with high-speed rotation, you can freshen up and keep your paint on your house siding in good shape.

Things we like

  • User friendly
  • Has easy and free moving wheels for maximal maneuverability
  • Promising accessories, making cleaning jobs more easier
  • Easy to set up and use
  • It can clean nearly all surfaces perfectly

things we don't like

  • Relatively expensive when compared to the Joe SPX3000 machine

3# Simpson Cleaning MSH3125 Gas Pressure Washer

Well, here comes a cool, gas-powered machine that packs a mean punch. Simpson Cleaning MSH3125 is typically powerful than many electric models because of its engine. It may be highly-priced, but it will blast through dirt and grime to restore your aluminum siding.

This pride-worth pressure washer employs a Honda GC190 residential engine for dependable power. With a whopping 3,200 PSI at 2.5 GPM, the model is undeniably the ideal for cleaning your aluminum siding house, painting surfaces, car, patio furniture, and more. In simple words, MSH3125 is versatile.

Along with that, this machine is engineered with a welded steel construction frame and weighs only 66 pounds. The 10-inch pneumatic tires provide increased stability for better results during the cleaning process. You can carry it with your worry-free.

The Simpson Cleaning MSH3125 is also equipped with five-quick connect nozzle tips, which allow extensive applications. All pressure washers from Simpson Cleaning Store are 100 percent functionally tested for accreditation, and MSH3125 isn't an exception. Even before placing your hard-earned money, you'll be assured of a real deal.

On the other hand, an ergonomic spray gun and OEM axial pump give it an upper hand to perform the job quickly and thoroughly. Many users claim that this gas-powered unit is east to start and set up, and many reviewers call it sturdy, powerful, and reliable.

Things we like

  • It's a gas-powered machine, thus powerful, reliable, and effective
  • Made of a sturdy welded steel construction frame
  • Can be used in a variety of operations
  • Stable wheels and lightweight to carry around
  • Easy to start and install

things we don't like

  • Exorbitantly expensive when compared with electric pressure washers
  • May produce unpleasant fuel odour/residual oil

4# GreenWorks 1600 PSI Pressure Washer

For washing concrete, aluminum siding, and other surfaces than need heavy-duty power, you need a machine like GreenWorks 1600 PSI pressure Washer. Probably, this is one of the most rigid pieces of machinery designed for homeowners who would want to tackle small cleaning projects.

Unlike our top choices, this model is the most affordable, yet amicably outstanding. First, it offers comprehensive cleaning solutions to meet almost every homeowner's needs.

Powerful and easy to use; this model will get the job done right. It's backed with a massive 13Amp universal motor - takes a 1600PSI at 1.2 Gallon Per Minute to spot lurk dirt and restore your aluminum siding appearance.

Simply put, this lightweight machine weighs only 17.5 pounds for easier storage and transportation. You can pressure wash anything around without having to use much effort. A 20-foot pressure hose and 35-foot power cord ensure great coverage.

Uniquely, GreenWorks 1600 PSI can be used horizontally or vertically for significant stability. If you think about great value, this pressure washer comes with a soap applicator and 2-high-pressure nozzles to handle different spraying levels. It may look simple, but it's worth it.

Things we like

  • An affordable option
  • Perfect for quick and small projects
  • Easy to drag, store and transport
  • Lightweight for regular washing
  • Comes with important accessories like a soap applicator

things we don't like

  • Not suitable for heavy-duty, much power projects

What to Consider In A Pressure Washer for Aluminum Siding

There are several factors to consider when choosing the best pressure washer for aluminum sliding. In fact, these factors will help you to determine what task a machine is best suited for and how well it performs. Now, what are those factors that you should check out?

Power Source

When we talk about pressure washers, power is of utmost importance. You'll want to check out how different models are powered. The most popular are electric, and gas models, and each comes with its own benefits and drawbacks.

Gas-powered machines are typically expensive, but more powerful than electric ones. There are suitable for heavy-duty jobs around your home. Electric powered, on the other hand, are pretty cheap, easier to maintain, and lighter.

Moreover, they operate quietly without creating any disturbance and harmful air pollution. These are suitable for small projects. However, both will perform when it comes to cleaning aluminum siding on the house.

Water Pressure

Another critical feature to consider is water pressure. When buying your model, you'll have to jot down the amount of force the pressure washer creates. Keep in mind pressure that goes hand in hand with cleaning power – more pressure means more cleaning power.

Mathematically, water pressure is measured in Pound per square inch (PSI). But this doesn't mean that you shop for any highest PSI model you come across. It will depend on what you intend to do with the machine. Any machine that starts at around 2,000 PSI up to 3,000 PSI is suitable for tackling aluminum siding. But keep the pressure in the 300 to 500 PSI range to eliminate any damage.

Gallon Per Minute (GPM)

The next key factor, which is closely related to PSI, is the GPM (Gallon Per Minute). This means the volume of liquid going through the pressure washer. PSI and GPM are directly correlated. When the pressure is high, the machine will use more water per minute.

A pressure washer with a high GPM will clean effectively and faster. In our case, aluminum siding requires more water to fully clean built-up dirt, mildew, and stains. A machine that uses 2GPM up to 4GPN will maneuver.

Motor & Engine

A motor is an essential part of a pressure washer. It exerts the power required to run the machine. A powerful motor is enough to deliver decent performance.

The engine is the heart of your pressure washer. Like how a healthy heart is vital for your body, the engine determines how powerful and amazing an electric pressure washer is. For example, Simpson Cleaning MSH3125 comes with a powerful Honda GC190 residential engine for reliable power.

Frequently Asked Questions

How Can I Maintain Excellent Looking Aluminum Siding?

Now that aluminum siding is the smartest choice for house exteriors, how can you maintain it? To restore and maintain its great-looking, cleaning is a must-do. Though it can last for more years, practical cleaning will keep it attractive. A pressure washer is a suitable tool for this. Clean it at least once a year.

How Many PSI Do I Need To Pressure Wash Aluminum Siding?

Aforementioned, you need around 1,500 PSI up to 3,000 PSI to clean the exterior layer of your house, which is aluminum siding. But it's a wise idea to go for a versatile machine that will offer a wide range of applications.

Final Verdict

Overall, cleaning aluminum siding on your house can be a daunting task, especially if it looks worn and tired. You can only make it easier by embracing the best technique and approach. That's where the best pressure washer for aluminum comes in handy.

A pressure washer will spruce up the accumulated grime and dirt. If you grab the machine and use it wisely, your siding will look amazing in no time. Our top pick is Simpson Cleaning MSH3125. This gas-powered machine is powerful, reliable, and versatile. Good luck!

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