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Old Mortar
A pressure washer will damage weathered brick houses and other landscaping surfaces with mortar. Any loose material, especially on older structures, will be blasted away by pressure washing on a high setting. Instead of a pressure washer, use this method to clean hard water stains off of brick.
Also, here’s how to pressure wash your whole house so that the new coat of exterior paint will stick better and last longer.
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Living Things
This one is (hopefully) a no-brainer. Never pressure wash humans, pets, or plants. The force of water coming from a pressure washer can cause physical harm — even penetrate skin—and will most certainly destroy your plants.
When you pressure wash appropriate surfaces, always wear safety glasses to protect your eyes from debris.
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