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 kill algae, mildew, and bacteria at the root. The chemistry does the work instead of the pressure. It's the only safe method 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 for an even, stripe-free finish
- 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 leaves the organism alive in the surface pores, so it comes back fast, often within months.
A soft wash kills the growth completely and lets it rinse away. That's why a soft-washed house in Tulsa stays clean noticeably longer than a pressure-washed one — the problem was treated, not trimmed.
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.