How to Clean Aluminum Siding with Pressure Washer [2023 Updated]

Aluminum siding is a popular choice for homeowners due to its durability and low maintenance. However, over time, it can accumulate dirt, grime, and other unsightly stains. If you’re facing this issue, you might be wondering how to restore your siding’s shine. That’s where a pressure washer comes in. 

How to clean aluminum siding with pressure washer? To clean aluminum siding with a pressure washer, start by removing loose debris and dirt using a soft-bristled brush. Then, use a low-pressure nozzle to apply a cleaning solution to the siding. Allow the solution to sit for a few minutes before rinsing with a high-pressure nozzle.

In this blog post, we’ll explore the steps to clean your aluminum siding using a pressure washer, so you can enjoy a pristine exterior once again. Get ready to transform your home’s curb appeal with these easy cleaning tips!

Preparing for Pressure Washing Aluminum Siding

Preparing for Pressure Washing Aluminum Siding

Pressure washing is a great way to restore your siding’s shine and make it look like new again. But before you get started, it’s essential to prepare properly. Following are the steps you need to take to prepare for pressure washing your aluminum siding, so you can achieve the best results possible.

Safety Precautions

When pressure washing aluminum siding, safety precautions are crucial to ensure a successful and injury-free cleaning process. Some safety measures to take include wearing proper protective gear, such as eye and ear protection, gloves, and non-slip shoes.

Before starting the pressure washer, it’s essential to check the nozzle and the hose for any damages and make sure they are securely attached. Also, one should never aim the pressure washer directly at someone or use it while standing on a ladder.

By taking these safety precautions, one can effectively clean their aluminum siding without causing harm to themselves or others.

Gathering the Necessary Equipment

When preparing to pressure wash aluminum siding, gathering the necessary equipment is an essential first step. You will need a pressure washer with a PSI of at least 2000, an extension wand, a nozzle with a 25-40 degree spray pattern, a ladder, safety goggles, and gloves.

It’s also helpful to have a cleaning solution specifically designed for pressure washing, as well as a bucket and scrub brush for any stubborn stains.

Taking the time to gather all necessary equipment beforehand will ensure a more efficient and effective cleaning process.

Assessing the Condition of Your Siding

When preparing to pressure wash aluminum siding, assess its condition before proceeding. This includes checking for any signs of damage, such as cracks or dents, and ensuring that the siding is securely attached to the house.

Consider the age of the siding, as older siding may be more fragile and require more delicate handling. By assessing the condition of the siding beforehand, you can avoid causing further damage during the pressure washing process.

Pressure Washing Aluminum Siding: Step-by-Step Guide

Pressure Washing Aluminum Siding: Step-by-Step Guide

Following is the process of pressure washing aluminum siding, from preparation to post-cleaning maintenance, so you can keep your home looking its best.

Preparing the Cleaning Solution

Before pressure washing your aluminum siding, it is essential to prepare the cleaning solution properly. The cleaning solution can be made using a variety of ingredients, including dish soap, bleach, vinegar, and water.

You should mix these ingredients in the right proportions to create a powerful cleaning solution that will remove dirt, grime, and stains from the aluminum siding effectively. You should ensure that the cleaning solution is suitable for use on aluminum siding and will not cause any damage or discoloration.

Once you have prepared the cleaning solution, you can move on to the next step of the pressure washing process.

Adjusting the Pressure Washer

When pressure washing aluminum siding, it is essential to adjust the pressure washer to ensure that you don’t damage the surface. You can adjust the pressure washer’s pressure by using the nozzle’s spray pattern or by adjusting the pressure regulator.

Start with a low-pressure setting and gradually increase the pressure until you find the perfect balance between removing dirt and grime without causing damage. It’s also essential to use the right nozzle for the job.

A 25-degree nozzle is suitable for general cleaning, while a 15-degree nozzle is more appropriate for stubborn stains. Always test a small area before starting the cleaning process to ensure that the pressure washer is set up correctly.

Spraying the Siding

  1. Use the right technique and equipment to ensure that the siding is cleaned properly without causing any damage. 
  2. Start by selecting the appropriate nozzle and adjusting the pressure to a safe level. 
  3. Begin spraying the siding from the top, working your way down and making sure to cover all areas evenly. 
  4. Use a sweeping motion and maintain a safe distance to avoid causing any dents or scratches. 
  5. Rinse the siding thoroughly with clean water and inspect it for any missed spots. 

Rinsing the Siding

When rinsing aluminum siding with a pressure washer, start from the top and work your way down. Make sure to use a wide spray pattern and keep the nozzle at a 45-degree angle to avoid damaging the siding.

Also, be mindful of any areas that may be more sensitive, such as around windows or doors, and adjust the pressure accordingly.

Eventually, make sure to rinse thoroughly to remove all soap and dirt, and avoid letting the water sit for too long to prevent streaks or water stains.

Tips for Achieving the Best Results

Tips for Achieving the Best Results

To achieve the best results while pressure washing, know the proper techniques and precautions to take. Below are some valuable tips to help you clean your aluminum siding with a pressure washer and get your home looking its best.

From choosing the right nozzle to using the correct pressure setting, these tips will help you avoid damaging your siding and achieve a sparkling clean finish. 

Starting from the Top

When using a pressure washer to clean aluminum siding, start from the top and work your way down to ensure that the dirt and grime are removed completely. This will also help to prevent streaking and ensure that the siding looks clean and even.

By starting at the top and working your way down, you’ll be able to reach all areas of the siding and ensure that no dirt or grime is left behind. On top of that, use the correct pressure setting on the pressure washer to avoid damaging the siding.

Working in Small Sections

When cleaning aluminum siding with a pressure washer, work in small sections. This allows for better control and ensures that all areas are thoroughly cleaned. By working in small sections, you can also focus on any areas that require extra attention or have stubborn stains.

It is recommended to start at the top of the siding and work your way down to prevent streaking. Furthermore, be sure to overlap each section to avoid missing any spots. Working in small sections can make the task of cleaning aluminum siding more manageable and efficient.

Using Proper Technique

When cleaning aluminum siding with a pressure washer, using proper technique is crucial to achieving the best results. Here are some tips to keep in mind:

  1. Start by testing a small, inconspicuous area of the siding to ensure that the pressure and spray nozzle you’re using won’t cause any damage.
  2. Keep the pressure washer nozzle at least 2 feet away from the siding to prevent any accidental damage.
  3. Use a wide-angle spray nozzle to cover more surface area and minimize the risk of damage.
  4. Work from the top of the siding down, spraying in a downward motion to avoid forcing water under the siding.
  5. Use a cleaning solution specifically designed for use with pressure washers and aluminum siding.
  6. Rinse thoroughly after cleaning to remove all cleaning solution and any dirt or grime that may have been loosened during the cleaning process.

By following these tips and using proper technique, you can effectively clean your aluminum siding with a pressure washer without causing any damage and achieve the best results.

Cleaning Hard-to-Reach Areas

Cleaning hard-to-reach areas of aluminum siding can be challenging, but there are some tips that can help you achieve the best results. One effective way to clean these areas is by using an extension wand for your pressure washer.

This will allow you to reach high or tight spaces without having to climb a ladder or get too close to the surface. Also, you can use a specialized cleaning solution designed for aluminum siding to help loosen and remove dirt, grime, and stains.

Take your time and use caution when cleaning hard-to-reach areas, as rushing or being careless can result in damage to your siding or injury to yourself.

Post-Cleaning Maintenance

After cleaning your aluminum siding with a pressure washer, perform some post-cleaning maintenance to ensure that it stays in top condition. Although aluminum is a durable material that can withstand harsh weather conditions, regular maintenance can help to extend its lifespan and keep it looking great for years to come.

In the following paragraphs, we are discussing some simple maintenance tips to follow after pressure washing your aluminum siding. By following these tips, you can maintain the cleanliness and appearance of your siding and prevent any damage or deterioration from occurring.

Drying the Siding

Drying the siding after pressure washing is crucial to prevent water spots and potential damage to the surface. Use a clean, dry towel or allow the siding to air dry completely before proceeding with any post-cleaning maintenance.

Avoid using abrasive materials or harsh chemicals during the drying process, as they can scratch or discolor the siding. If necessary, use a leaf blower or soft-bristled brush to remove any remaining water droplets from hard-to-reach areas.

Remember to always follow the manufacturer’s instructions and safety guidelines when using a pressure washer or any other cleaning equipment.

Inspecting for Damage

When inspecting for damage on your aluminum siding after pressure washing, you should check for any signs of dents, scratches, or other forms of physical damage. You should also look out for any signs of moisture or water damage, such as mold, mildew, or discoloration. Any damage should be repaired promptly to prevent further deterioration and maintain the appearance and longevity of your aluminum siding.

Making Repairs

Some common repairs include fixing dents, replacing damaged panels, and addressing any water damage or mold growth that may have occurred as a result of the pressure washing process. Make these repairs promptly to prevent further damage to the siding and to maintain the aesthetic and structural integrity of the home.

Applying Protective Coatings

Applying protective coatings is an essential step in post-cleaning maintenance of aluminum siding. Protective coatings help to prevent oxidation and corrosion of the aluminum surface, which can cause unsightly stains and damage over time.

There are various types of protective coatings available in the market, including acrylic, silicone, and epoxy coatings. Before applying any coating, it is essential to ensure that the surface is thoroughly cleaned and dried to avoid any adhesion issues.

Choose a coating that is compatible with the aluminum siding material and the environmental conditions in your area. Applying a protective coating can extend the lifespan of your aluminum siding and help maintain its appearance for years to come.

Understanding the Benefits of Pressure Washing Aluminum Siding

Understanding the Benefits of Pressure Washing Aluminum Siding

In this section, we’ll explore the benefits of pressure washing your aluminum siding, including how it can save you time and money, improve the overall appearance of your home, and extend the life of your siding. So let’s dive in and learn more about the advantages of pressure washing your aluminum siding.

Quick and Efficient Cleaning

Pressure washing offers a faster and more effective way to remove dirt, grime, and stains from the surface of the siding. It can also help to prevent the growth of mold and mildew, which can damage the siding and create health hazards. Pressure washing is environmentally friendly because it uses less water than traditional cleaning methods. Nevertheless it is necessary to follow safety guidelines and avoid using too much pressure, which can damage the siding or cause injury.

Environmentally Friendly

When cleaning aluminum siding with a pressure washer, consider the environmental impact of the cleaning solution and process. Many pressure washing detergents contain harsh chemicals that can harm the environment and even pose a health risk to humans and animals.

Fortunately, there are environmentally friendly options available that are just as effective at cleaning aluminum siding. Some examples include using a mixture of vinegar and water or a biodegradable cleaning solution. Adjusting the pressure and distance of the pressure washer can also help minimize any negative impact on the environment.

By using environmentally friendly cleaning methods, not only are you protecting the planet, but you are also ensuring the safety of those around you. It’s a win-win situation that benefits everyone involved.


When it comes to cleaning aluminum siding, using a pressure washer can be a cost-effective option. Hiring a professional to clean your siding can be expensive, but investing in a pressure washer can save you money in the long run. Pressure washing allows you to tackle the job yourself, eliminating the need for a professional and saving you money on labor costs.

Pressure washing can extend the lifespan of your aluminum siding by removing built-up dirt, grime, and other debris that can damage the siding over time. By investing in a pressure washer and taking care of your siding yourself, you can save money and keep your home looking its best.


Cleaning aluminum siding with a pressure washer is easy. First, remove any debris or dirt using a brush. Next, apply a cleaning solution using a low-pressure nozzle. Let it sit for a few minutes, and then rinse with a high-pressure nozzle. 

In conclusion, pressure washing is an effective and efficient way to clean your aluminum siding. Not only does it remove stubborn dirt and grime, but it also helps maintain the integrity and longevity of your siding.

By using a pressure washer, you can save time and energy compared to traditional cleaning methods. Pressure washing can enhance the curb appeal of your home and increase its overall value.

At the end, if you want to keep your aluminum siding looking its best, pressure washing is definitely the way to go. Just be sure to follow the proper techniques and safety precautions to ensure a successful and safe cleaning experience.

We hope this guide has provided you with the information and insights you need to confidently clean your aluminum siding with a pressure washer. Happy cleaning!

Frequently Asked Questions (How to Clean Aluminum Siding with Pressure Washer)

How much pressure does it take to clean aluminum siding?

When cleaning aluminum siding, it is recommended to use a pressure washer with a pressure setting between 1,200 and 1,500 pounds per square inch (psi). This range is generally effective for removing dirt, grime, and mildew without causing any damage to the siding.

It is important to avoid using excessive pressure, as it can dent or bend the aluminum panels.

What is the best thing to clean aluminum siding with?

The best solution for cleaning aluminum siding is a mixture of mild detergent and water. You can create this solution by mixing a non-abrasive household cleaner or dish soap with water in a bucket.

Apply the solution to the siding using a soft-bristle brush or a sponge, working from the bottom up. Rinse thoroughly with clean water after scrubbing.

What do you spray on siding before pressure washing?

Before pressure washing siding, it is advisable to apply a specialized siding cleaner or a mildew remover solution. These products are designed to help loosen dirt, grime, mildew, and other stains, making it easier for the pressure washer to remove them effectively.

Follow the instructions provided by the manufacturer for the specific product you are using.

What not to do when pressure washing siding?

When pressure washing siding, there are a few things to avoid to prevent damage:
Using excessive pressure: High-pressure settings can cause dents, scratches, or even strip off paint from the siding. Stick to the recommended pressure range mentioned earlier.
Spraying water upward: Avoid directing the pressure washer’s stream upward as it may drive water behind the siding, leading to moisture issues and potential damage.
Using abrasive materials: Do not use abrasive brushes or harsh cleaning solutions that can scratch or corrode the siding’s surface.
Neglecting safety measures: Always wear protective gear like goggles and gloves while pressure washing, and be cautious of your surroundings to prevent accidents.

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Andrew Joseph
Andrew Joseph

Introducing Andrew Joseph, a pressure washing expert with 15 years of experience in residential, commercial, and industrial projects. Andrew shares his vast knowledge through insightful blog posts, offering valuable tips and best practices for optimal cleaning results. His passion for educating others, combined with his extensive expertise, makes Andrew an indispensable resource for those looking to master the art of pressure washing.