Can I Use A Pressure Washer To Clean Windows?

One piece of equipment that stands out as a secret weapon in the fight against dirt and grime in a world full of tedious domestic duties is the pressure washer. Although pressure washers are most recognised for their ability to quickly and effectively remove stubborn stains from exterior surfaces like patios and driveways, they also excel at washing windows, a duty that is often overlooked.

Window Washer stock photo

In this article, we explore the waters of utilising a pressure washer as a window cleaning method. We will learn strategies and clever shortcuts that will make what was previously a scary process, a piece of cake. Using the pressure washer’s great strength and versatility, you can clean your home like an expert, improving its appearance without spending a tonne of time or energy.

Can I Use A Pressure Washer To Clean Windows?

Absolutely! Cleaning with pressure washing windows is an effective and time-saving solution that can yield great results. Pressure washers are typically used for cleaning exterior surfaces, but with enough planning and adjustment, they may be used for indoor window washing as well. What you must know is as follows.

Pressure Settings

The force with which water is ejected from the nozzle can be adjusted with the pressure settings of a pressure washer. Pressure is commonly expressed as several (pounds per square inch). It’s crucial to regulate the pressure settings before washing windows to avoid breaking them. Windows are fragile and can break or be damaged in various ways if too much force is applied to them. That’s why it’s best to wash windows with a less powerful setting.

The pressure washer should be started at its lowest setting and raised if necessary. Start at a distance of at least two feet from the window to gauge the force of the water spray. Reduce the pressure immediately if the windows are flexing or the glass is rattling as a result of the pressure.

The goal is to find the sweet spot of pressure where the windows may be cleaned thoroughly without being damaged. Finding the sweet spot between enough pressure to clean thoroughly and a level that prevents damage is essential.

Nozzle Selection

If you want sparkling windows after using a pressure washer, it’s important to use the proper nozzle. The spray pattern and strength of the water are both affected by the nozzle you use. Some popular nozzle choices and their intended uses are as follows:

0-Degree Nozzle (Red)

This nozzle produces a concentrated, pencil-thin stream of water. It is designed for maximum pressure and is typically used for tough, stubborn stains on hard surfaces. However, it is not suitable for window cleaning as the high-pressure stream can damage the glass or window frames.

15-Degree Nozzle (Yellow)

The 15-degree nozzle creates a narrow, high-pressure spray pattern. It offers a bit more coverage compared to the 0-degree nozzle while still providing a significant amount of pressure. Although it can be used for heavy-duty cleaning, it is not recommended for window cleaning due to the potential risk of damage.

25-Degree Nozzle (Green)

The 25-degree nozzle produces a wider spray pattern, making it a popular choice for general cleaning tasks. It offers a good balance between pressure and coverage, making it suitable for removing dirt and grime from windows. The wider spray pattern helps distribute water evenly without applying excessive pressure on the glass.

40-Degree Nozzle (White)

The 40-degree nozzle provides an even wider spray pattern, dispersing water over a larger area. It is considered the gentlest option and is often used for delicate surfaces such as cars, outdoor furniture, or windows. The wider spray angle helps reduce the risk of concentrated pressure and potential damage to the windows.

Maintain Distance

Safe and effective window cleaning requires keeping the pressure washer nozzle at a safe distance from the glass. The importance of location and how to achieve the best outcomes are discussed below.

Preventing Damage

The high-pressure water spray from a pressure washer can be powerful enough to damage windows if the nozzle is held too close. The force of the water can cause cracks, chips, or even break the glass. By maintaining a safe distance, you minimize the risk of unintentional damage to the windows.

Avoiding Pressure Imbalances

Holding the nozzle too close to the window creates an uneven distribution of pressure. Certain areas may receive excessive pressure, which can lead to damage or streaking, while other areas may not receive enough pressure to effectively clean the surface. Maintaining the right distance ensures that the pressure is evenly distributed, resulting in consistent cleaning across the entire window.

Finding The Optimal Distance

The ideal distance between the pressure washer nozzle and the window surface can vary depending on factors such as the pressure washer model, the pressure setting, and the condition of the windows. As a general guideline, start by holding the nozzle approximately 2 feet (60 centimetres) away from the window surface. From there, you can adjust the distance based on your observations of the cleaning effectiveness and any potential damage.

Test And Observe

Before proceeding with cleaning the entire window, it is advisable to test the pressure washer on a small, inconspicuous area of the window. Observe the impact of the water spray and ensure that the pressure and distance are appropriate and that there is no damage or undue stress on the window.


When cleaning windows with a power washer, pre-treatment is crucial. Pressure washing is most successful when filth, grime, and tenacious stains have been treated with a cleaning solution or detergent beforehand. The following is essential information regarding pre-treatment:

Window Cleaning Solutions

Use a window cleaning solution specifically formulated for use on glass surfaces. These solutions are designed to effectively break down dirt, grease, and other residues commonly found on windows. Avoid using harsh or abrasive chemicals that can damage the glass or surrounding surfaces.

Dilution And Application

Follow the instructions provided with the window cleaning solution to determine the appropriate dilution ratio. Mix the solution with water as directed, and apply it to the window surface using a spray bottle, sponge, or soft cloth. Ensure that the solution covers the entire window, paying special attention to areas with heavy soiling.

Soaking Time

Allow the cleaning solution to sit on the window surface for a few minutes to allow it to penetrate and loosen the dirt. This soaking time helps to break down stubborn stains and make the cleaning process more efficient. Avoid letting the solution dry on the windows, as it can leave residue and streaks.

Scrubbing, If Necessary

For particularly stubborn stains or heavily soiled windows, you may need to gently scrub the surface with a soft brush or sponge. Be cautious not to apply excessive pressure that could damage the glass. Scrubbing can help dislodge stubborn debris and enhance the effectiveness of the pressure washer.


Cleaning windows with a power washer requires a certain method that must be mastered. You may get a flawless finish if you use the appropriate motions and techniques. Here are some essential methods to remember:

Starting From The Top

Begin cleaning the windows from the top and work your way down. This ensures that any cleaning solution or dirt that runs down during the cleaning process does not drip onto already cleaned areas, preventing streaks and uneven cleaning.

Sweeping Motions

Use sweeping motions with the pressure washer wand or nozzle. Start from one side of the window and move horizontally or vertically across the surface, maintaining a consistent distance from the glass. This helps ensure even coverage and thorough cleaning. Avoid staying in one spot for too long to prevent potential damage.

Overlapping Strokes

Overlap each stroke slightly to ensure that no areas are missed. By overlapping the cleaning paths, you guarantee that every part of the window receives adequate cleaning and rinsing. This technique also helps to avoid streaks caused by uneven cleaning patterns.

Controlled Movements

Maintain control over the pressure washer wand or nozzle and keep a steady hand. Avoid jerky or erratic movements that may lead to uneven cleaning or accidental damage. Smooth and controlled motions provide a more even distribution of pressure and a consistent cleaning result.

Angled Approach

Hold the pressure washer wand or nozzle at a slight angle to the window surface. This helps direct the water spray evenly across the glass and allows for effective dirt removal. Avoid holding the nozzle perpendicular to the window, as this can create excessive pressure and potential damage.

Distance And Pressure

Continuously monitor the distance between the pressure washer nozzle and the window surface. Maintain a safe distance as recommended earlier, and adjust the pressure settings if needed. Pay attention to the cleaning results and make necessary adjustments to achieve optimal cleaning without causing damage.

Rinse Thoroughly

After using the pressure washer to clean the windows, thoroughly rinse the windows with clean water to remove any remaining cleaning solution or debris. This final rinse helps ensure a streak-free finish and removes any residue that may be left behind.

Rinse And Dry

Rinsing and drying windows thoroughly after cleaning them with a pressure washer is essential for a streak-free, shiny result. The basic procedure for washing and drying is as follows:

Thorough Rinse

After completing the cleaning process with the pressure washer, use a lower pressure setting or switch to a wide-angle nozzle to rinse the windows thoroughly. Start from the top and work your way down, ensuring that all the cleaning solution, dirt, and debris are removed from the surface.

Check For Residue

While rinsing, inspect the windows for any remaining residue or streaks. If you notice any, you may need to re-rinse specific areas or use a soft sponge or cloth to gently wipe away the residue.

Squeegee Technique

To achieve a streak-free finish, consider using a squeegee. Start from the top corner of the window and pull the squeegee down in a smooth, straight motion. Wipe the squeegee blade with a clean cloth or sponge after each stroke to prevent streaks caused by residual water or dirt.

Drying Cloth Or Microfiber Towel

After using the squeegee, use a clean, lint-free cloth or microfiber towel to dry any remaining moisture on the windows. Gently wipe the cloth over the surface of the windows, focusing on edges and corners where water tends to accumulate.

Check For Streaks

Inspect the windows for any streaks or water spots. If you notice any, use a dry portion of the cloth or towel to buff and polish the affected areas until the streaks are eliminated.

Indoor Windows

For windows located indoors, place absorbent towels or a drop cloth beneath the windowsill to catch any drips or spills. It’s important to protect your indoor surfaces while drying the windows.


Cleaning windows with a power washer can be a quick and effective way to have them look like new again. You may clean your windows thoroughly and get rid of any filth, grime, or persistent stains by using the right pressure settings, nozzle, distance, pre-treatment, technique, and rinsing and drying procedures.

However, safety should always come first, and while using high-pressure water, it’s crucial to pay attention to and obey all warning labels and guidelines provided by the manufacturer. With the appropriate method, you may have crystal-clear windows that don’t leave streaks and improve the look of your home or company.

Leave a Comment

Your email address will not be published. Required fields are marked *