Concrete vs pavers — the joint resanding difference
Plain concrete is the cheapest exterior surface to pressure wash — a surface cleaner attachment handles it quickly with high PSI. Paver patios cost more per sqft because the joints between pavers need targeted cleaning, and the polymeric joint sand washes out during cleaning. Re-sanding the joints afterward (or accepting that they need topping up) is part of the job. Plan for 30–50% above the calculator's base rate if your patio is pavers.
Patio material guide
Concrete (poured or stamped) is fastest and cheapest to wash. Brick patios wash similarly to concrete but need slower technique to avoid eroding the mortar. Flagstone (slate, sandstone, bluestone) varies wildly — slate tolerates high PSI; sandstone is soft and benefits from soft-wash. Travertine and limestone are calcium-rich and react to acidic cleaners — stick to a plain water wash or pH-neutral cleaner only.
Pool surrounds and lanais — chemistry caution
Pool-deck patios and screened lanais need extra care because cleaning chemistry can drift into pool water or screen meshes. Sodium hypochlorite (the standard soft-wash mix) is the same chlorine the pool already uses, so small drift is harmless — but a strong concentrated rinse near the pool can bleach plants and corrode metal screen frames. Cover plants, mask metals, and time the wash for a calm day with no wind.
Sealing pavers and stamped concrete after cleaning
Plain concrete patios don't typically need sealing. Pavers and stamped concrete benefit from sealer every 3–5 years because the sealer locks the joint sand in place and prevents premature surface wear. Sealing is a separate trade — $0.50–$1.50 per sqft on top of the cleaning. Plan to clean, let the surface dry fully (48+ hours), then seal.
Regional cost-of-living impact
Patio cleaning labor scales with regional cost of living, same as every other surface. A 300 sqft concrete patio at standard intensity costs roughly $50 in Atlanta (0.95× multiplier), $71 in San Francisco (1.35×), and $74 in Manhattan ZIP 100xx (1.40×). The calculator applies your ZIP's USPS-prefix- based regional multiplier automatically.