Best Power Washing in Philadelphia, PA

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Q: How often should I power wash my Philadelphia home? A: Once per year is the standard for most Philadelphia homes. The city's humidity, road salt, and tree canopy create heavy algae and mold growth. Homes in areas with mature tree cover (Chestnut Hill, Mt. Airy) may benefit from twice-yearly washing of north-facing surfaces where growth accumulates fastest.

Q: Is power washing safe for old Philly brick? A: Standard high-pressure washing (2,500–3,500 PSI) can damage aged mortar joints common in pre-1940 row homes. Reputable contractors use soft washing (500–1,200 PSI with surfactant detergents) for brick facades. Ask specifically whether the contractor owns a soft-wash rig or is using a standard hot-water pressure washer turned down.

Q: Will power washing remove the green algae on my concrete steps? A: Yes — a combination of sodium hypochlorite solution (soft wash) and 2,000+ PSI rinsing removes algae, black mold, and mildew from concrete. Note that concrete in the shade will re-grow algae within 6–12 months in Philadelphia's humid summers. Some contractors offer a preventive biocide application for $30–$60 that extends the clean surface by another 6 months.

Q: Do I need to be home during the service? A: No. Most contractors need only access to an outdoor water spigot and clear the yard of furniture. They will lock gates behind them. Confirm this in writing before the appointment, as some companies require a walkthrough first.

Q: What is the difference between power washing and pressure washing? A: The terms are used interchangeably by most consumers, but technically power washing uses heated water while pressure washing uses cold water at high PSI. Hot water is more effective on grease (driveways, restaurant patios) and dissolves organic matter faster. For standard residential cleaning in Philadelphia, cold pressure washing is sufficient and less expensive.