The single most expensive misunderstanding in exterior cleaning is treating 'pressure washing' as one thing. It's two very different methods, and using the wrong one on the wrong surface causes permanent damage.
Pressure washing uses high-pressure water — thousands of PSI — to physically blast contamination off hard surfaces. It's the right tool for concrete: driveways, sidewalks, patios, pool decks.
Soft washing uses low pressure — about the force of a garden hose — paired with professional cleaning solutions that remove the stains caused by algae and mildew. The chemistry does the work instead of the pressure. It's the method we use for siding, roofs, stucco, and painted surfaces.
Which surfaces get which method
- Vinyl siding — soft wash only. High pressure forces water behind the panels and can void the manufacturer warranty
- Brick and stucco — soft wash. Pressure etches stucco and blows out aging mortar joints
- Asphalt shingle roofs — soft wash, no exceptions. Pressure strips the protective granules and ages a roof years in one afternoon
- Concrete driveways and sidewalks — pressure washing with a commercial surface cleaner in straight, overlapping passes
- Wood decks and fences — low, wood-appropriate pressure with brightening solutions
Why this matters more in Oklahoma
Tulsa's humidity makes organic growth — algae, mildew, lichen — the main thing making exteriors look dirty, more than actual dirt. High pressure knocks growth loose but can leave the stains half-done and the surface roughed up.
A soft wash lifts the stains with cleaning solution and lets them rinse away — the stains are lifted, not just sprayed at. How long a Tulsa house stays clean depends on shade, weather, and surface.
Hydra Total Care soft washes every house and roof, and reserves true pressure for the concrete that can take it. If a company quotes you a 'house pressure wash,' ask exactly what PSI is touching your siding — then call us for a second opinion at (918) 922-9348.