How to Clean a Concrete Patio in Naples, FL

A concrete patio in Naples cleans up with a chlorine-based cleaner, a 10 to 15 minute dwell time, and a rinse at 1,500 to 2,500 PSI through a flat surface cleaner. That combination lifts the black and green film without the wand-swirl marks a bare pressure washer tip leaves behind. A typical 300 to 500 square foot patio takes 45 to 90 minutes to do yourself, or runs roughly $100 to $200 professionally in Southwest Florida.

What is actually growing on a Naples patio?

Almost none of it is dirt. Southwest Florida sits at high humidity for months at a time, and shaded, north-facing concrete stays damp long enough to grow three things: algae, the green film that is worst under screen cages and roof overhangs; mildew and mold, the black speckling that collects in expansion joints; and lichen, the flat, crusty grey-green discs that will not scrub off. A fourth stain is specific to homes on well-fed irrigation: iron, which turns concrete orange and does not respond to chlorine at all.

What do you need to clean a concrete patio?

• A pressure washer rated 2,000 to 3,000 PSI at 2 to 4 GPM. On flat concrete, water volume does more work than raw pressure.
• A surface cleaner attachment, the round disc with spinning bars underneath. This is the single biggest difference between a clean patio and a striped one.
• Sodium hypochlorite (pool chlorine) diluted to roughly 1 to 2 percent, with a little surfactant so it clings instead of running off.
• A garden hose for pre-wetting plants and flooding the perimeter afterward.

How do you clean a concrete patio step by step?

• Clear and pre-wet. Move furniture and planters off the slab, then soak nearby grass, hedges and beds with plain water before any cleaner is applied.
• Apply the cleaner. Spray the diluted chlorine across the whole slab and let it dwell 10 to 15 minutes. Do not let it dry in the sun - re-mist if it starts to.
• Work the stubborn spots. Lichen, grill grease and tire marks need a stiff brush while the solution is still wet.
• Rinse with the surface cleaner. Overlap each pass by about a third and move at a steady walking pace so the slab cleans evenly.
• Flood the perimeter. Rinse the surrounding plants and beds a second time so no residue sits on roots.

Can you clean a concrete patio without a pressure washer?

Yes, for light algae. The same chlorine solution from a pump sprayer, given 15 minutes to dwell, scrubbed with a stiff deck brush and flooded off with a hose will take a green slab back to grey. It is slower, and it will not lift deep-set lichen or years of grease, but on a small screened lanai slab it genuinely works.

How often should you clean a concrete patio in Naples?

Once a year for most homes, twice for slabs in permanent shade or under oaks. The rainy season here runs June through September, and that is when algae goes from a faint tint to a slick, genuinely unsafe surface. Late spring and again in October is the pattern that keeps a patio looking clean year-round. Most homeowners bundle it with the rest of the hardscape as deck and patio cleaning.

Should you seal the patio afterward?

Only once it is fully clean and dry, which means waiting at least 24 to 48 hours. Sealing over live algae traps it under the film and it blooms back through within a season. Sealed concrete does stay clean noticeably longer in this climate, but it is a separate job, not part of the wash.

Naples concrete patio FAQ

Will pressure washing damage my concrete patio? It can. A zero-degree or 15-degree tip held close will etch permanent lines into the surface. A surface cleaner at 2,000 to 2,500 PSI will not.

Why is my patio orange instead of green? That is iron staining from well-fed irrigation, common on the eastern side of the county. Chlorine will not touch it - it needs an oxalic acid rust remover.

Does a slab under a screen cage still need cleaning? Yes. Cages hold humidity in and cut airflow, so caged pool decks and lanais often grow algae faster than fully open patios.

If you would rather not give up a Saturday to it, see what pressure washing in Naples covers.