Dirty windows can obstruct your view and detract from your home’s appearance. While cleaning interior windows is straightforward, exterior windows present unique challenges—especially for multi-story homes. Pressure washing is a fast and efficient solution, but it requires careful execution to avoid damage.
In this guide, we’ll show you how to pressure wash your windows safely and effectively, provide tips on DIY cleaning, and advise you on when to call in professionals.
Understanding the Risks of Pressure Washing Windows
Can you use a power washer to clean your windows? Yes, but only when using the correct technique and equipment. While effective, pressure washing has potential risks. The wrong pressure setting and technique can crack glass, loosen window putty, and damage frames.
Understanding these risks and taking proper precautions to ensure your windows remain intact and functional after cleaning is crucial. The key is to use low pressure and the right nozzle to avoid damaging your windows or surrounding areas.
Essential Equipment for Pressure Washing Windows
You’ll need the right equipment to safely and effectively pressure wash your windows. Your toolkit should include a suitable pressure washer, appropriate nozzles, and essential safety gear.
Choosing the Right Pressure Washer
Select a pressure washer with adjustable settings—ideally, one that can operate between 1300 and 1700 pounds per square inch (PSI). This PSI range is powerful enough to deliver a deep clean without damaging your windows.
When choosing a pressure washer, consider the size of your home and the number of windows. If you have a larger home, a more powerful machine with a higher PSI may be necessary, but always use the lowest effective setting on your windows.
Selecting Appropriate Nozzles and Attachments
Use a wide-angle nozzle, such as a 40-degree nozzle (white) or a 65-degree nozzle (black). These nozzles distribute water over a broader area, reducing the risk of damage. An extension wand can help you reach higher windows safely from the ground. You can also use a nozzle with a soap dispenser attachment. This feature disperses the cleaning solution evenly.
Safety Gear You’ll Need
Wear eye protection, gloves, and closed-toe shoes to protect yourself from debris and potential splashback while working. Wear a mask to keep you from inhaling cleaning chemicals.
Preparing Your Windows and Surroundings for Pressure Washing
Before cleaning, inspect all windows for existing damage. Look for cracks in the glass or frame, and seal any gaps with window caulking. If frames appear old or worn, especially wooden ones, consider alternative cleaning methods to avoid potential damage.
Remove or cover outdoor furniture, decorations, and potted plants in the cleaning area. Use tarps to protect immovable objects, and cover exposed electrical outlets with waterproof tape to prevent water ingress.
Make sure all windows are tightly closed before cleaning. Add tape where the window meets the sill to prevent water from seeping in. This step is especially important for older windows or those prone to leaks.
Step-By-Step Guide To Pressure Wash Windows
Follow these steps to safely and effectively clean your windows using a pressure washer.
Setting Up Your Pressure Washer
Fill the pressure washer tank with water and add a suitable cleaning solution. A mixture of water and a few drops of dishwashing liquid can be effective and eco-friendly. Always check the manufacturer’s instructions for compatible cleaning agents. Before starting, check that your pressure washer is on a stable surface and that all hoses are securely connected.
Applying Cleaning Solution
Maintain a distance of 3–5 feet from the window and angle the sprayer at about 30 degrees to the glass. Start at the top of each window and work your way down. Apply the cleaning solution lightly and quickly over wooden frames or caulking to avoid damage. Clean one or two windows at a time to prevent the solution from drying and leaving streaks. If you encounter stubborn spots, resist the temptation to move closer to the glass. Instead, make additional passes with the sprayer or use a soft brush to scrub away the dirt gently.
When applying the solution, use a back-and-forth motion to cover the entire surface evenly. Allow the solution to sit for a few minutes to break down dirt and grime, making it easier to rinse away.
Rinsing and Drying
Rinse the windows thoroughly using clean water. You can use a garden hose or the rinse setting on your pressure washer. After rinsing, use a squeegee or microfiber mop to remove excess water and minimize streaking. Allow windows to air dry completely before replacing screens.
Once the windows are dry, apply a glass cleaner to remove water spots and streaks.
Best Practices for Pressure Washing Different Window Types
Different types of windows may require slightly different approaches when pressure washing. Let’s discuss the best methods for each type.
Double-Pane Windows
Double-pane windows are more resistant to pressure but still require care. To prevent water infiltration, avoid directing the spray at the seals between panes. Double-pane windows offer better insulation but are susceptible to moisture accumulation between the panes.
Single-Pane Windows
Single-pane windows are generally more delicate and require extra care. Use the lowest effective pressure setting and maintain a greater distance from the window surface. Be particularly cautious around the edges where the glass meets the frame.
If you’re unsure about the pressure setting to use, start with the lowest setting and gradually increase it if necessary. Always err on the side of caution to avoid damaging these delicate windows.
Storm Windows
Storm windows often have more robust frames but may have weaker seals. Pay extra attention to the edges and corners, using a gentler spray to avoid dislodging the window from its frame. You may even want to remove and clean these windows individually. Doing this allows for a more thorough cleaning and reduces the risk of dislodging or damaging the window.
Troubleshooting Common Issues While Pressure Washing
Even with careful preparation, you may encounter some challenges while pressure washing your windows. Here’s how to handle them.
Addressing Water Streaks
To minimize streaking, clean windows on cooler, overcast days when possible. If streaks occur, quickly wipe them away with a squeegee or microfiber cloth before they dry. Using distilled water for the final rinse can also help reduce streaking, as it contains fewer minerals that can leave deposits on the glass.
Dealing With Stubborn Stains
For tough stains, avoid increasing pressure. Instead, use a specialized cleaning solution and allow it to sit briefly before rinsing. If necessary, repeat the process rather than risking damage with excessive pressure. A soft-bristle brush may also be useful here.
Handling Pressure-Related Problems
If you notice any signs of damage or water infiltration, stop immediately. Reduce pressure or switch to manual cleaning methods for that area to prevent further issues.
Aftercare and Maintenance for Pressure-Washed Windows
After pressure washing, inspect your windows for any signs of damage or water intrusion. Clean the windowsills and tracks to prevent mold growth. Consider applying a water-repellent treatment to help maintain cleanliness and protect against future stains.
When To Call a Professional Window Cleaner
While pressure washing windows can be a DIY task, there are times when professional help is advisable. If you have a multi-story home, numerous windows, or if you’re uncomfortable working with pressure washers, leave the cleaning to the pros. Also, seek expert assistance if you notice any window damage or if your windows are particularly old or delicate.
Choosing a Reputable Window Cleaning Service
When selecting a professional service, look for insured and bonded companies with good references. Check online reviews and ask for detailed quotes. While price is important, don’t make it your sole deciding factor. Consider the company’s experience, services offered, and customer satisfaction ratings.
