Can You Wash Windows with a Power Washer: A Guide for Safe


The thought of cleaning windows, especially those on higher floors, can be daunting. A pressure washer can be a tempting solution, offering the promise of faster cleaning and the ability to reach those out-of-the-way windows. But before you unleash the power, it’s crucial to understand how to use a pressure washer safely and effectively on windows.

Safe Use is Key

While pressure washers can be window-cleaning lifesavers, improper use can lead to cracked windows, damaged window frames, and even injury. By following the right steps and techniques, you can achieve sparkling clean windows without the risk of costly repairs.

Using a Power Washer on Windows: Yes, But With Caution

Safety First:

The immense power of a pressure washer can easily damage windows if not used correctly. High pressure can crack glass, and the forceful spray can dislodge window frames or loosen caulking. To avoid these issues, it’s essential to use the right settings and techniques.

See also: How Much PSI Do I Need to Pressure Wash Concrete?

Pressure Washer Setup:

For window cleaning, opt for an electric pressure washer. These typically have a lower PSI (pounds per square inch) than gas-powered models, making them safer for delicate surfaces like glass. Look for a pressure washer in the 1300-1700 PSI range for window cleaning tasks.

When it comes to nozzles, choose one with the widest spray pattern possible. This helps distribute the water pressure more evenly and reduces the risk of concentrated blasts damaging the window. Look for nozzles with a 40-degree or 65-degree spray pattern for window cleaning.

Window Cleaning Technique:

Preparation is Key:

Before unleashing the pressure washer, give your windows a pre-rinse with a regular garden hose. This removes loose dirt and debris that could potentially scratch the glass under the high pressure of the washer.

Soap it Up:

For stubborn grime and a more thorough clean, apply a pressure washer-approved window cleaning solution. These solutions are formulated to tackle dirt and grime without damaging the glass or window frames.

Spray with Care:

Once you’re ready to use the pressure washer, keep the nozzle at a safe distance from the window and use the wide spray pattern you selected earlier. Start at the top of the window and work your way down, allowing the rinse water to flow freely and remove any soap residue. This prevents streaks and ensures a sparkling clean finish.

Additional Considerations

Window Frame Material:

Aluminum and vinyl window frames generally hold up well to pressure washing. However, use caution with wood frames. Check the integrity of the caulking and weather stripping around the windows before using a pressure washer. Damaged caulking can allow water to seep behind the window frame, potentially leading to rot and other problems.

Alternatives for Delicate Windows:

For very old windows, delicate windows, or windows with questionable caulking, it’s best to forgo the pressure washer and stick to a gentler method. A regular garden hose with a spray nozzle attachment can be a perfectly effective way to clean these windows.

See also: The GPM Needs in Pressure Washers


By following these steps and using caution, you can achieve sparkling clean windows with the help of a pressure washer. Remember, the key is to use the right settings, techniques, and equipment to avoid damaging your windows. If you’re unsure about cleaning high-rise windows or windows in hard-to-reach areas, consider consulting a professional window cleaning service. Their expertise and equipment can ensure a safe and sparkling clean, even for the most challenging windows.

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