You can improve your house’s street appeal by pressure washing your patios, sidewalks, entry ways, and even your house using a “soft wash” technique. Here we have a small residential pressure wash job in Seattle. The customer wanted to get rid of the moss, algae, and gunk from her sidewalks. During these cold rainy months mossy steps and walkways can be very slippery and dangerous. Pressure washing your walkways is a simple easy solution to keep your walkways safe and looking great.