Soft washing uses lower pressure (typically under 500 PSI) combined with specialized cleaning chemicals to break down organic growth, while traditional pressure washing relies primarily on high-pressure water (1,500-3,000+ PSI) for cleaning power. For most house siding, especially vinyl, composite, or painted surfaces, soft washing is often the better choice. It’s gentler on materials, more effective at killing organic growth at the root level, and results tend to last longer because the cleaning solutions prevent regrowth. Pressure washing works well for harder surfaces like concrete driveways or brick, but can damage siding, force water into unwanted areas, or strip paint if not done carefully. The best house washing services use a combination approach, selecting the right method for each surface.