Pressure washers are a fantastic tool for cleaning outdoor surfaces, offering a powerful stream of water that can blast away dirt, grime, and even tough stains. However, their strength can also be a disadvantage if used incorrectly. Knowing where you should avoid using a pressure washer is crucial to prevent damage to your property and ensure safe operation. In this article, we will explore the surfaces that are not suitable for pressure washing, alternative cleaning methods for these areas, and safe practices for pressure washing approved surfaces.
Safety First
Pressure washers can produce water pressure ranging from 1,500 to 4,000 PSI (pounds per square inch), making them capable of causing significant damage if not handled correctly. They can strip paint, etch concrete, and even cut through skin. Therefore, it’s essential to approach pressure washing with caution, especially around delicate surfaces and living things.
Delicate or Living Things
First and foremost, never use a pressure washer on people, pets, or plants. The high-pressure water stream can cause serious injury to humans and animals, including deep cuts and bruises. For plants, the force of the water can strip away leaves, break stems, and damage roots, leading to wilting or death. Always ensure the area you are cleaning is free of any living beings before you begin.
Protecting Your Property
While pressure washers can be incredibly effective, there are several surfaces where their use can do more harm than good. Below, we will discuss these vulnerable surfaces and the reasons why pressure washing should be avoided.
Roofs (Asphalt Shingles)
Asphalt shingle roofs are one of the most common types of roofing, and they are particularly vulnerable to damage from pressure washers. The high pressure can strip away the granules that protect the shingles from the sun and weather. This not only shortens the lifespan of the roof but also voids many roofing warranties. Additionally, the force of the water can loosen shingles and cause leaks.
Alternative Cleaning Methods for Roofs
Instead of using a pressure washer, consider soft washing your roof. Soft washing uses low-pressure water combined with specialized cleaning solutions to remove algae, moss, and dirt without damaging the shingles. This method preserves the integrity of the roof while effectively cleaning it.
Soft Surfaces: Wood Siding and Painted Surfaces
Wood siding and painted surfaces are also at risk when exposed to the high pressure of a power washer. The water pressure can chip and peel paint, leading to an unsightly appearance and the need for costly repainting. For wood siding, pressure washing can cause the wood to splinter and degrade, allowing moisture to penetrate and potentially leading to rot and mold growth.
See also: Pressure Washing Your Deck with a Turbo Nozzle: A Professional Guide
Alternative Cleaning Methods for Wood and Paint
For wood siding, a gentle scrubbing with a soft brush and a mild detergent is often sufficient. If you need to clean painted surfaces, a garden hose with a spray nozzle set to a gentle setting can usually do the trick without risking damage. Always test a small, inconspicuous area first to ensure that the cleaning method is safe.
Windows
The glass in windows is not designed to withstand the intense pressure from a power washer. High-pressure water can crack or shatter the glass, leading to expensive repairs or replacements. Additionally, the pressure can damage window seals, causing leaks and reducing energy efficiency.
Alternative Cleaning Methods for Windows
To clean windows safely, use a soft cloth or sponge and a mild glass cleaner. For higher windows, a squeegee attached to an extension pole can help you reach without using a ladder. Avoid abrasive cleaners that can scratch the glass and compromise clarity.
Light Fixtures
Outdoor light fixtures, including those around porches and gardens, are not built to withstand high-pressure water. The force of the water can damage the fixtures, leading to electrical problems and water ingress, which can cause short circuits or rust.
Alternative Cleaning Methods for Light Fixtures
Cleaning light fixtures is best done by hand. Turn off the power to the fixtures, remove any bulbs, and gently wipe down the surfaces with a damp cloth and mild detergent. Use a soft brush to remove any stubborn dirt or cobwebs.
Brickwork (Use Caution)
Brickwork can usually handle some pressure washing, but it requires caution. The mortar between bricks is vulnerable to the high pressure and can erode or crack, leading to structural issues over time. Loose or older bricks can also be dislodged.
Alternative Cleaning Methods for Brickwork
For cleaning brickwork, consider using a low-pressure setting on your pressure washer or using a garden hose with a spray nozzle. Additionally, a soft brush and a mixture of water and mild detergent can effectively clean bricks without damaging the mortar.
Safe Pressure Washing Practices
When using a pressure washer on approved surfaces, it’s important to follow best practices to avoid causing damage. Here are some key tips for safe pressure washing:
Use Lower Pressure Settings
For most cleaning tasks, a lower pressure setting (1,500 to 2,000 PSI) is sufficient and much safer than higher settings. Higher pressures should only be used for very tough stains and on surfaces that can handle the force, such as concrete driveways and patios.
Start from a Distance
Always start pressure washing from a distance and gradually move closer if necessary. This helps you gauge the impact of the water pressure on the surface and prevent accidental damage. A distance of 3 to 4 feet is usually a good starting point.
See also: How Much PSI Do I Need to Pressure Wash Concrete?
Use the Right Nozzle
Different nozzles provide different spray patterns and pressure levels. For most cleaning tasks, a 25-degree or 40-degree nozzle is appropriate, as these provide a wider, gentler spray. Avoid using the 0-degree nozzle, as its concentrated spray can easily cause damage.
Keep the Nozzle Moving
Never hold the pressure washer nozzle stationary over one spot for too long. Keep it moving in a sweeping motion to avoid concentrating the force on one area, which can lead to etching or cutting into the surface.
Follow Manufacturer Guidelines
Always follow the manufacturer’s guidelines for both the pressure washer and the surface you are cleaning. This ensures that you are using the equipment correctly and safely.
Regular Maintenance and Inspection
Regularly inspect your pressure washer for any signs of wear or damage, and perform necessary maintenance according to the manufacturer’s instructions. This helps ensure that the machine operates safely and efficiently.
Conclusion
Pressure washers are incredibly useful tools, but their power requires careful handling to avoid damaging delicate surfaces and causing injuries. By understanding where not to use a pressure washer, you can protect your property and ensure a longer lifespan for your home and belongings. For surfaces like asphalt shingles, wood siding, painted surfaces, windows, light fixtures, and brickwork, opting for gentler cleaning methods is the best choice. When using a pressure washer on approved surfaces, always use lower pressure settings, start from a distance, use the appropriate nozzle, and keep the nozzle moving to ensure safe and effective cleaning.
By following these guidelines, you can enjoy the benefits of pressure washing while minimizing the risks, keeping your property in excellent condition and avoiding costly repairs.