Most maintenance contractors will suggest that you power wash your patio about once a year. You can safely power wash other hard surfaces aside from your patio itself, for example: Decks. Walkways.

To achieve the best results, use a low-pressure stream and lots of detergent. A high-pressure spray pattern can force detergent to be absorbed into the brick, which can leave ugly stains. It's also helpful to divide your project up and work in sections.

Follow these tips to avoid damage as you clean your patio: Keep your pressure washer nozzle a safe distance from the stone. Your pressure washer's stream is most powerful at the tip of the nozzle. If the tip is too close to the stone, you can chip and crack it.