Pressure Washing: What Surfaces to Avoid

Pressure washing is an effective way to clean a variety of surfaces, but its powerful jets of water can cause damage if used incorrectly. To ensure your cleaning efforts are both effective and safe, it’s important to know which surfaces should be avoided when using a pressure washer. Here are some key surfaces to steer clear of and the reasons why.

1. Asphalt Shingles

Pressure washing asphalt shingles can cause significant damage. The high-pressure water can strip away the protective granules, leading to premature aging and increased vulnerability to the elements. This can shorten the lifespan of your roof and lead to costly repairs.

2. Wood Siding

While wood decks and fences can benefit from pressure washing, wood siding is more delicate. High-pressure water can penetrate the wood, causing it to crack, splinter, or develop mold and mildew from the trapped moisture. Instead, use a gentler cleaning method or consult a professional.

3. Old Mortar

If you have an older brick home or walkway, be cautious. Pressure washing can erode the mortar between bricks, leading to instability and potential structural issues. It's better to clean old mortar gently with a lower pressure setting or by hand.

4. Windows

Windows and their seals can be damaged by the high pressure. Water can seep through the seals, causing leaks and potential water damage inside your home. Additionally, the force can break or crack the glass. It's best to clean windows using traditional methods like a hose and squeegee.

5. Electrical Panels and Meters

Water and electricity do not mix. Avoid using a pressure washer on or near electrical panels, meters, or other electrical fixtures. Water infiltration can cause short circuits, damage, or even fire hazards. Clean these areas manually with a dry cloth or a very gentle spray of water.

6. Vehicles

While some people use pressure washers to clean their cars, it’s risky. The high pressure can strip paint, damage the car’s finish, and even dent the body. Use a regular garden hose and car-safe soap instead, along with a soft sponge or cloth.

7. Air Conditioning Units

The delicate fins and coils of air conditioning units can be easily bent or damaged by a pressure washer. This can reduce the efficiency of the unit or even cause it to malfunction. Use a vacuum or a specialized coil cleaner instead.

8. Stained or Painted Surfaces

If you have a stained or painted surface, pressure washing can strip away the color and finish. This is especially true for decks, fences, and painted walls. Use a lower pressure setting or a gentle cleaning solution to preserve the finish.

9. Laminate and Composite Decking

Laminate and composite decking can be damaged by the intense force of a pressure washer. The high pressure can cause splintering, cracking, and even delamination. Use a soft brush and mild soap to clean these surfaces safely.

10. Garden Furniture

Plastic, wicker, and certain types of wood furniture can be damaged by high-pressure water. The force can cause cracks, fading, and other types of wear. Clean garden furniture with a mild soap and water solution using a soft cloth or sponge.

Conclusion

While pressure washing is a powerful cleaning method, it’s important to use it wisely. Avoiding these surfaces can help you prevent damage and prolong the life of your home and belongings. When in doubt, start with a low-pressure setting or consult a professional for advice on the best cleaning methods for delicate surfaces.

If you need professional help with your pressure washing needs, contact us for a consultation. We offer a range of services tailored to both residential and commercial properties, ensuring your surfaces are cleaned safely and effectively.