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If you don’t use the right PSI setting for your fence’s material, then yes, pressure washing can ruin your fence. Specifically, if you use a PSI that's too powerful, you may permanently damage a fence. Pressure washers can also remove paint from fences, though this can be a great thing if you’re looking to restore an old wood fence.

As you can imagine, the difference between soft washing and pressure washing is the amount of pressure applied in the cleaning process. Soft washing is a gentler method that uses a low-pressure nozzle and is safe for fragile paint and masonry. Because it’s not as aggressive as pressure washing, you need to use a cleaning solution when soft washing.

If pressure washers are stored in freezing conditions and aren’t pretreated for such temps, any liquid remaining in the water pump may freeze, expand, and severely damage your machine. While often recommended, emptying the machine with compressed air is a long and tedious process and still may not completely drain the liquid in this pressure washer part. But adding a bit of antifreeze instead will keep it in tip-top shape without the extra effort.

A good PSI for a pressure washer will depend on the job you're doing. Pressure washer PSI ratings range from 1,300 to 4,200 PSI. Lower PSI is suitable for cleaning dirt and debris off of softer materials. Use a low PSI when pressure washing vinyl siding , wood, or stucco. A heavy-duty job like cleaning graffiti off of concrete or brick will require at least 2,000 PSI.