The appropriate PSI (pounds per square inch) for soft washing a house can vary depending on factors like the type of siding, the level of dirt and grime, and the cleaning solution used. Generally, soft washing involves using lower pressure compared to traditional pressure washing. A typical soft washing PSI range could be around 100 to 500 PSI. This lower pressure helps prevent damage to more delicate surfaces like siding, stucco, wood, and roofing materials. The key with soft washing is to rely more on the cleaning solutions and less on high pressure for effective cleaning. It’s important to note that the right PSI is only part of the equation. The cleaning solution, the type of nozzle, and the technique used also play crucial roles in achieving a successful soft wash. In many cases, it’s advisable to hire a professional who has experience with soft washing and understands how to balance pressure and cleaning agents for the best results. If you’re planning to do it yourself, start with the lowest pressure setting and test it in an inconspicuous area to make sure it’s not causing any damage or peeling paint. Always follow manufacturer guidelines for your pressure washer, and if you’re uncertain, consult with experts or professionals who specialize in soft washing.