“A good first appearance on a home can add as much as 5 to 10 percent to the value of the home,” says John Aust, president of the National Association of Real Estate Appraisers. These words may be important to keep in mind when trying to decide between pressure washing a home yourself or hiring a professional. A common myth among the general public is that pretty much anyone can properly power wash any surface. This may be true to some extent but you can easily cause damage to yourself and your home if you’re not careful. Pressure wash machines generate extreme amounts of pressure and can very easily damage the siding on a home if not used properly. With that said, it’s also very possible for a person with average pressure washing knowledge to not be aware of safety precautions that must be taken when operating a pressure washer. For example, all plants in the cleaning area should be pre-rinsed with water before beginning to wash with soap or other chemicals. Moreover, you should always wear the proper personal protection like gloves and safety glasses.