Your patio is where you grill, relax, and host friends. It is also one of the first places Florida’s humidity shows up. Green film, dark patches, and slick spots can build up in just a few weeks, and a patio that looks great in spring can feel unusable by midsummer.

The right patio cleaning method depends on what your patio is made of. Pavers, brick, natural stone, and concrete all react differently to pressure and cleaners. This guide walks through each material, the safest way to clean it, and when it makes sense to bring in a professional.

Why Patios in St. Augustine Get Dirty So Fast

Patios sit outside all year, and Northeast Florida’s climate is tough on them. A few common causes explain why the grime comes back so quickly.

Humidity keeps surfaces damp. Even on sunny days, shaded corners and low spots stay moist, which gives algae and mildew a place to grow. This is most noticeable near landscaping and under trees.

Rain and sprinklers spread growth. Water carries algae spores and soil across the patio. Irrigation overspray along the edges is a frequent source of staining.

Pollen, leaves, and sap leave marks. Organic debris breaks down on the surface and leaves dark spots and a sticky film.

Furniture and planters trap moisture. The ground under pots, grills, and chairs often turns dark or green because water cannot evaporate.

Salt air adds grime near the coast. Homes closer to St. Augustine Beach often see a dull film build up faster than inland properties.

Common Patio Stains and What Causes Them

Knowing what you are looking at makes it easier to pick the right cleaner.

Green or black growth: Algae, mold, or mildew in damp or shaded areas.
Gray, dull film: Dirt, pollen, and airborne residue.
Orange or rust marks: Metal furniture, fasteners, or iron in irrigation water.
Oil or grease spots: Grill drips, food spills, and sunscreen.
White, chalky haze: Efflorescence, which is mineral salt rising to the surface.
Weeds in the joints: Common between pavers and bricks where soil collects.

Algae and mildew are living growth. A quick rinse removes the surface layer, but a proper cleaner is what slows them from returning.

How to Clean a Paver Patio

Pavers are popular in Florida, and they need a gentler touch than many people expect. The sand packed between the pavers, called joint sand, keeps everything locked in place. Too much pressure can blast that sand out and leave you with shifting pavers and weeds.

Here is a safe approach for light cleaning:

Sweep the surface. Clear leaves and loose debris.
Wet the pavers. A gentle rinse helps loosen dirt.
Apply a patio cleaner made for pavers. Follow the label for dilution and dwell time.
Scrub stubborn spots. Use a soft or medium bristle brush.
Rinse with a wide fan tip. Keep the nozzle moving and at a safe distance.
Check the joints. If sand washed out, the patio may need re-sanding.
Let it dry. Allow the surface to dry fully before any sealing.

Pavers that look faded or blotchy often respond well to professional cleaning followed by sealing, which helps bring out the color and protect the surface.

How to Clean a Brick Patio

Brick is durable but porous, which means it soaks up moisture and stains easily. Old brick can also have soft mortar joints that break down under heavy pressure.

Use low to moderate pressure and avoid blasting the mortar.
Choose a cleaner made for masonry or brick.
Test any product on a small, hidden area first.
Avoid strong acids unless a professional recommends them. They can damage mortar and discolor brick.
Rinse thoroughly so no residue stays in the pores.

If your brick has a white, chalky haze, that is likely efflorescence. It often needs a product made for that specific problem.

How to Clean a Natural Stone Patio

Natural stone looks beautiful, but it is the most sensitive material on this list. Travertine, limestone, and flagstone can be dulled or etched by the wrong cleaner.

Stay away from harsh acids. Acidic products can eat into calcium-based stone and leave permanent marks.

Use a pH-neutral or stone-safe cleaner. These are designed to lift dirt without damaging the surface.

Go easy on pressure. Soft stone can pit or erode under high pressure.

Check the manufacturer’s care guidelines. If you are not sure what type of stone you have, a professional can help identify it before cleaning.

How to Clean a Concrete Patio

Standard poured concrete is the toughest of the four, but it is also porous. It handles higher pressure well, though stamped, stained, or coated concrete needs a lighter touch.

For plain concrete, a cleaner matched to the stain plus controlled pressure usually does the job. Oil spots may need a degreaser, and algae needs a cleaner that targets organic growth. A surface cleaner attachment helps give an even finish and avoids the streaky lines that a bare wand can leave.

Patio Pressure Washing: What to Know Before You Start

Patio pressure washing is fast and effective, but it is easy to overdo. These tips help protect your surface.

Match the pressure to the material. Pavers, brick, and stone usually need less pressure than plain concrete.
Use a wide fan tip. A narrow, concentrated stream is more likely to etch or gouge.
Keep the nozzle moving. Staying in one spot can leave marks.
Hold a safe distance. Start far back and move closer only as needed.
Watch the joints. Aim to clean the surface without washing out the sand.
Protect plants and furniture. Move items away and rinse nearby landscaping before and after cleaning.

Power washing a patio uses heated water, which can help with grease and tough grime. It is not needed for most home patios, but it can be useful for heavily soiled or oily areas.

Choosing the Right Patio Cleaner

A good patio cleaner does most of the work, so you do not have to rely on pressure alone. The best option depends on the stain and the surface.

Algae and mildew: Use a cleaner made to kill and lift organic growth.
Grease and sunscreen residue: A degreaser or detergent-based cleaner works better than water alone.
Rust stains: These often need a rust-specific treatment.
Natural stone: Choose a pH-neutral cleaner made for stone.

Be careful with bleach and strong acids. They can discolor surfaces, damage mortar, and harm nearby plants. When in doubt, test in a small, hidden spot first.

Common Patio Cleaning Mistakes to Avoid

A few small errors can turn a simple cleaning into a repair job.

Using too much pressure on pavers, brick, or stone
Blasting out joint sand and leaving pavers loose
Letting cleaner dry on the surface before rinsing
Using acidic cleaners on natural stone
Skipping the drying time before sealing
Forgetting to protect nearby plants and furniture

If you ever see light and dark stripes after a cleaning, it usually comes from uneven pressure or cleaner that dried in patches.

How Often Should You Clean Your Patio

Most patios in St. Augustine benefit from a cleaning once or twice a year. Your own schedule depends on a few things.

Shade and tree cover: More shade means faster algae growth.
Patio use: Frequent grilling and entertaining mean more spills and foot traffic.
Material: Porous surfaces like brick and pavers show staining sooner.
Sprinkler exposure: Patios near irrigation tend to stain along the edges.
Coastal exposure: Salt in the air adds grime on properties closer to the water.

If the patio looks dull, feels slick, or has visible green or black patches, it is time for a cleaning.

Sealing Your Patio After Cleaning

Once the patio is clean and fully dry, sealing helps protect it. A good sealer slows how much moisture and dirt soak in, which makes future cleanings easier. On pavers, sealing also helps hold joint sand in place and keeps the color looking rich.

Sealing works best on a clean, dry surface. Applying sealer over leftover algae or dampness can cause it to fail early.

When to Hire Patio Cleaning Services

DIY cleaning works for small patios with light dirt. A professional is worth considering if you have:

A large patio that would take most of a weekend
Heavy, set-in algae, rust, or oil stains
Natural stone or decorative surfaces that are easy to damage
Pavers with washed-out joints or shifting
Plans to re-sand and seal after cleaning

Professional crews use commercial equipment, adjustable pressure, and cleaners matched to your material. They also know how to protect your landscaping and outdoor furniture while they work. If you are searching for paver patio cleaning near you, look for a local company that understands Northeast Florida’s climate and surfaces.

Combine Patio Cleaning With Other Exterior Services

Most homeowners have more than just a patio that needs attention. Our pressure washing service covers driveways, walkways, and other hard surfaces in the same visit. For paver patios, paver cleaning restores the look of the surface, and paver sealing helps protect it afterward. If you notice loose pavers, damaged edging, or other small repairs, our handyman service in St. Augustine can handle those too.

Patio Cleaning FAQ

What is the best way to clean a patio?

Start by sweeping, apply a cleaner made for your patio material, scrub stained spots, and rinse with controlled pressure. The right method depends on whether you have pavers, brick, stone, or concrete.

Can I pressure wash my patio?

Yes, if you use the right nozzle and pressure for the material. Pavers, brick, and stone need a gentler approach than plain concrete, since high pressure can wash out joint sand or damage the surface.

How do I remove green algae from a patio?

Apply a cleaner designed to kill algae, let it dwell for the time listed on the label, then scrub and rinse. Algae is living growth, so a cleaner works better than water alone.

Is power washing better than pressure washing for patios?

Power washing uses heated water, which helps with grease and heavy grime. For most patios, regular pressure washing with the right cleaner is enough.

Should I seal my patio after cleaning?

Sealing is not required, but it helps protect against stains and makes future cleaning easier. It is especially helpful for paver patios.

How much does patio cleaning cost in St. Augustine?

Cost depends on the size of the patio, the material, and the level of buildup. A free estimate is the easiest way to get an accurate price.

Final Thoughts

A clean patio is easier to enjoy and safer to walk on, and regular upkeep helps the surface last longer. The key is matching your method to your material. Pavers, brick, stone, and concrete each need their own approach, and the wrong pressure or cleaner can cause damage that is expensive to fix.

Ready for a Cleaner Patio?

A1A Pressure Washing provides professional patio cleaning throughout St. Augustine, St. Johns County, and Northeast Florida. Request a free estimate and let us help bring your outdoor space back to a clean, inviting look.

Patio Cleaning in St. Augustine: A Guide to Pavers, Brick, Stone, and Concrete