Whether you’re performing basic home maintenance or prepping the windows prior to repainting the trim, learn how to easily clean off all of the dust, dirt and debris with the help of a pressure washer.

Step 1

Assess the Condition

Before using the pressure washer, take a close-up look at your windows. Check to make sure all caulking is in good condition, and that that the glazing around the panes is intact. If you plan on re-caulking or re-glazing, avoid pressure washing until the repair has been made. 

Be aware of any spots on your trim that may need repainting. The pressure washer can help to loosen chipping paint, but it can also damage exposed wood if the stream of water is too forceful.

Step 2

Water Soil Beneath Windows

Soaking the soil beneath each window helps to dilute any chemicals that are in the soap that you will use to wash the windows.

Step 3

Add Soap Concentrate to Pressure Washer Reservoir

Pour multi-use soap that is formulated for pressure washers into your washer's reservoir. Most formulas will show on the packaging that the soap is safe for siding, windows and sidewalks. Install the soap tip to the end of your pressure washing wand. When activated, the wand with the soap tip will provide a powerful stream of soapy water, but at a lower pressure (a ~60-degree angle spray) than other tips (stronger pressure tips range from narrower 40-degree, to a pin-point 0-degree stream).

Step 4

Use Pressure Washer to Apply Soap

Turn on the pressure washer and initiate the wand. Use the soapy spray to target the trim, keeping the tip of the wand at a 45-degree angle to the window and trim. Aiming the wand at an angle to its target will help to lift and remove dirt from the trim, windowsill and glass from beneath more effectively than blasting it straight on. It will also help to loosen any flaking paint, which helps with preparing your window trim for a new coat of paint.

Step 5

Rinse Windows

Turn off the pressure washer and switch the tip on the wand to a “general use” tip. A tip that delivers a 15- to 20-degree angle will provide a stronger pressure stream that will effectively remove soap that is on the surface and any dirt that has been loosened by the soap. Spray from the top of the window downwards to completely rinse the window clean. 

When complete, check to ensure that the glazing and caulk is still in good condition and allow the window to air dry for several days before you prime and paint.