Patio and lanai cleaning in Sarasota removes the black algae that roots into porous pavers, travertine and concrete in shaded areas. Open patios are cleaned with a surface cleaner, while tight lanais are largely wand work at controlled pressure. Cleaning is the required first step before sealing. Call 941-266-5284.
Patio cleaning is one of the things our customers mention most on our Google profile, right alongside lanai work. That is not a coincidence. A lanai is the outdoor room Sarasota homeowners actually use, and it is also the surface that gets dirty fastest, because the screen cage that makes it comfortable is the same thing that blocks the sun from drying it out.
Sarasota Paver Sealing Pros cleans patios and lanais across Sarasota, Bradenton, Venice and Lakewood Ranch. Pavers, travertine, natural stone, stamped and plain concrete each need a different touch. This page covers how the surface changes the method, why shade drives everything, and how cleaning fits into sealing.
Why is my lanai always dirtier than the rest of the property?
Because it never gets the two things that keep a surface clean, which are direct sun and moving air. A screen enclosure diffuses sunlight and slows airflow by design. That is what makes a lanai pleasant to sit in. It also means moisture that lands on the floor stays there far longer than it would on an open patio ten feet away.
Add the roof overhang, the house wall on one side and usually a tree on another, and parts of a Sarasota lanai floor essentially never dry out during the wet season. Black algae establishes in those areas first and spreads outward from them.
The floor is porous too, whether it is pavers, travertine or concrete. Growth is not sitting on top of the surface, it is rooted in the pores. That is why a garden hose brightens a lanai for a week and then it goes gray again. You removed the top and left the roots.
| Location and surface | Sun and airflow | What shows up first | Relative cleaning interval |
|---|---|---|---|
| Open patio in full sun, pavers | High sun, good airflow | Light surface dust and pollen | Longest |
| Open patio, concrete, near irrigation | High sun, sprinkler overspray | Orange iron staining, then algae | Long, but rust needs spot treatment |
| Screened lanai, sunny side, pavers | Diffused sun, some airflow | Faint gray film across the field | Moderate |
| Screened lanai, shaded side, pavers | Little direct sun, slow airflow | Black algae rooted in the pores | Short |
| Lanai under tree canopy, travertine | Minimal sun, constant organic litter | Tannin staining and dark growth | Shortest, and needs gentle chemistry |
| Pool deck edge, any surface | Sun, plus constant splash out | Chlorine dulling and mineral haze | Moderate, watch for efflorescence |
| North side walkway, concrete | Shaded most of the day | Slick green film, a slip risk | Short, safety driven rather than cosmetic |
Do you use a surface cleaner or a wand on a patio?
Both, and the split is different from a driveway. An open patio with a decent field of pavers or concrete gets a rotating surface cleaner across the main area, because the spinning jets deliver an even number of passes to every square inch and leave no stripes.
A lanai is usually a different situation. It is smaller, it has a screen kick plate all the way around, columns, a pool coping edge, a step, and often a threshold into the house. A surface cleaner cannot get into any of that. So lanais tend to be more wand work than driveways are, and that puts more weight on operator technique.
Wand work is not a problem in itself. Uncontrolled wand work is. Distance, angle, speed and tip selection are what separate a clean edge from a permanent stripe. The mistake homeowners make with rental equipment is holding the tip too close for too long, and on travertine or stamped concrete that shows immediately.
How do you clean travertine and natural stone without damaging it?
Carefully, and at much lower pressure than pavers. Travertine is a softer stone with natural voids in it, and aggressive pressure pits the surface and opens those voids further. Once a travertine deck has been etched by too much pressure it is not something that can be undone by cleaning it again.
It also matters what chemistry goes on it. Acid based products that are appropriate for rust on concrete will damage calcium based stone. Travertine is calcium carbonate, so an acid that dissolves mineral deposits also dissolves the stone. We select products by surface, not by habit.
The approach is a gentle cleaning agent, dwell time, low pressure rinse, and patience on the stubborn areas rather than more force. Slower is the correct answer on stone.
How we clean a lanai and get it ready for sealing
- Move furniture, planters and rugs out, and cover anything that stays
- Clean the pool cage first so debris from the frame lands before the floor is done
- Pre treat rust rings, tannin stains and the heaviest algae areas with dwell time
- Clean the open field with a surface cleaner where the space allows it
- Detail the kick plate, columns, step, coping edge and threshold with a wand at controlled pressure
- Match pressure and chemistry to the material, gentler on travertine and natural stone
- Let the surface dry completely, which takes longer in a shaded enclosure
- Re-sand the paver joints and compact before any sealer is applied
What causes the rings and marks under my patio furniture?
Usually rust, from metal furniture feet sitting on a damp porous surface. The iron oxidizes and stains into the paver or concrete underneath. It needs a rust specific treatment rather than general cleaning, and on stone the product has to be chosen with the material in mind.
The other common one is a clean patch rather than a stain. Furniture that has not been moved for a couple of years shields the surface underneath from the growth and weathering happening everywhere else. When it is finally moved you get a light rectangle. Cleaning the whole surface resolves that by bringing everything else back to the same tone.
Planters cause both problems at once, holding moisture against the surface and leaving a ring. Pads or feet under furniture and planters after a cleaning prevent the whole cycle from starting again.
Does cleaning a lanai remove the joint sand from the pavers?
Yes, and it should. The joints are where weeds, ants and organic growth actually live. Cleaning the paver faces and leaving compacted, colonized sand in the joints is a half job that looks fine for a month.
After the surface has dried, the joints get re-sanded. On a lanai this matters as much as on a driveway even though there is no vehicle weight involved, because the sand is what keeps the field interlocked and keeps the joints from opening up.
The sequence is fixed. Clean, dry, sand, then seal. Sand never goes in after sealer, because sealer is what binds and hardens the sand in the joint. That hardened joint is a large part of what you are paying for when you seal a lanai.
Is patio cleaning included when I have the lanai sealed?
Yes. Sealer soaks into the surface rather than covering it, so anything left in the pores gets locked in under a hard clear layer. Sealing a lanai with algae still rooted in the shaded corner means looking at that corner for years.
Our sealing quotes include the cleaning required to prepare the surface and the joint sanding on paver work. If you are comparing prices, that is the thing to check, because a cleaning and sanding priced separately changes the comparison entirely.
Cleaning only is also a perfectly good standalone job. Plenty of homeowners have the lanai and cage cleaned once a year and seal it on a much longer cycle.
How often should a Sarasota patio or lanai be cleaned?
Exposure sets the interval and it varies more than people expect. An open patio in full sun with airflow on all sides holds up considerably longer than a screened lanai on the north side of a house under an oak. The same paver, installed the same way, in two spots on the same property, will need cleaning on completely different schedules.
Sealed surfaces stay clean longer than unsealed ones, and that is one of the more practical reasons to seal a lanai. Closing the pores means growth has much less to establish in, so you deal with the surface less often.
The signal to watch for is the shaded edge going gray green, usually the corner nearest the house or a planted bed. Once that starts, it spreads. Cleaning at that stage is a lighter job than waiting for the whole floor to turn.
