Do you know what pressure your roof tiles and siding paint can take?
It all depends. If you live inside of a cave made of solid rock, then power washing is probably a fine idea. Why? Because rock can withstand the pressures of power washing. What matters most isn’t the amount of pressure but what you are washing. Pressure washing your driveway, brick patio, or rock wall are all fine uses of this system. However, once you start swinging the hose in the direction of your home, you may start to run into problems. Not all surfaces can be treated the same. This means that your tar gravel single roof, wood or vinyl siding, and potentially window frames can all be damaged during the pressure cleaning process. Paint will be chipped off and anything that isn’t fastened down will get removed via the spray. Low-pressure washing is a better alternative as your roof shingles and home siding will withstand the pressure much better.
Are you sure that all of the gunk and grime is cleaned off?
The other problem with purely pressure washing is that you aren’t getting all of the dirt off that you need to get off. Think about all of the cracks and crevices on the side of your home. Dirt and grime will continue to live there and host mold and mildew. Pressure washing can push these agents deeper into their caves allowing them to grow and multiply over time. So, pressure washing won’t just damage your home’s roof and siding, it can lead to mold, dry rot, and a decrease in your home’s value. Think that roof was supposed to last you 20-30 years? Not anymore, since you power washed it one too many times. Think of it this way. Do you just spray your dirty clothes with a hose and let them dry? No! You stick them in a washing machine that uses detergent and low-pressure water to rinse all the dirt and grime away. The same principle applies to soft washing. So, next time, do the smart thing and stay away from the pressure washer.