Commercial Property Hardscape Power Washing Procedure
Restore and maintain concrete, brick, stone, and interlock paver surfaces. This procedure covers chemical pretreatment, pressure parameters, surface cleaning technique, and post-wash inspection for commercial properties.
To provide a standardized, repeatable method for pressure washing commercial hardscape surfaces — concrete, brick, stone, and interlock pavers — that removes dirt, mildew, oil stains, and efflorescence without damaging the substrate. Proper execution extends surface life, improves slip resistance, and maintains curb appeal for commercial properties.
This SOP applies to all exterior horizontal and vertical hardscape surfaces on commercial properties including walkways, plazas, loading docks, stairways, retaining walls, and parking lot curbs. It covers gas and electric pressure washer setups in the 3000–4000 psi range with appropriate surface cleaners and chemical injectors. Excluded: sealed surfaces (require separate low-pressure protocol), asphalt, wood decking, and interior floors.
- Lockout/Tagout — disconnect spark plug wire or battery on gas units; unplug electric units. Verify zero energy before any nozzle or hose service.
- Wear face shield, chemical-resistant gloves, rubber boots, hearing protection (≥85 dBA), and waterproof suit. Do not operate without closed-toe footwear.
- Wet surfaces are extremely slippery. Use sand shoes or boots with aggressive tread. Barricade work zone with cones and wet-floor signs. No public access during washing.
- Read SDS for all cleaning chemicals. Alkaline concrete cleaners are corrosive — avoid skin/eye contact. Neutralize spills with vinegar solution. Have spill kit on site.
- Keep wand and spray at least 10 ft from overhead power lines. Never spray electrical panels, outlets, or junction boxes. Use GFCI-protected circuits for electric units.
- Pressure washer (3000–4000 psi, 4+ GPM) — gas or electric
- Surface cleaner attachment (15–20 inch diameter)
- Rotary nozzle / turbo wand (0° – 25° variable)
- Chemical injector or downstream sprayer
- Alkaline concrete degreaser / heavy-duty cleaner (pH 10–13)
- Stiff-bristle push broom or deck brush
- Plastic sheeting (6 mil) + tape for plant and fixture protection
- Garden hose with spray nozzle for pre-wet / final rinse
- 5-gal bucket for chemical mixing
- PPE: face shield, nitrile gloves, rubber boots, hearing protection
- Spill kit with absorbent pads, neutralizer, disposal bags
- Cones, barricade tape, wet-floor signs
- Camera or smartphone for documentation