Travertine is everywhere in west Orlando. Walk through Windermere, Horizon West, Winter Garden, Ocoee, Hamlin, Waterleigh, Clermont or Minneola and you will see it on front walkways, entry courtyards, lanai floors and patios. It looks warm and expensive when it is clean. After a Central Florida wet season, though, many homeowners notice the same thing: gray-green film in the shaded corners, black spots in the natural pits of the stone, and a surface that feels slick underfoot after rain.
The natural reaction is to rent a pressure washer or grab a strong cleaner from the hardware store. On travertine, both can do lasting harm. This guide explains why travertine needs a different approach from concrete pavers, what soft wash (low pressure plus detergent) means for natural stone, and what to ask before you hire anyone.
Orlando West Soft Wash is a matching service. We connect homeowners with a local soft-wash crew for exterior cleaning. We do not clean the stone ourselves, and we are not a stone restoration company, a hardscape installer, a sealing contractor or a pool company. The crew you are matched with sets the scope, price and method.
Why travertine is different from concrete pavers
Most driveways in west Orlando subdivisions are interlocking concrete pavers. Travertine is a natural stone, and it behaves differently in three ways that matter for cleaning.
First, it is calcareous. The Natural Stone Institute explains that calcareous stone is composed mainly of calcium carbonate, and that calcium carbonate is sensitive to acidic solutions, so mild, non-acidic cleaners are recommended. That single fact rules out a long list of common products.
Second, it is porous and pitted. Travertine forms with natural holes and voids. Tumbled and unfilled pavers, which are popular outdoors because they grip better, have even more open texture. Those pits hold water, pollen and organic debris, which is exactly why algae and mildew love them.
Third, it is relatively soft. Compared with dense concrete pavers, travertine can scuff, pit further or lose its finish under aggressive impact. Many installs also sit on sand joints that wash out under high pressure, which can leave pavers loose or rocking.
None of this makes travertine fragile in normal use. It just means the cleaning method has to fit the stone rather than the other way around.
Why it turns green and black in Central Florida
The local climate does most of the work. Florida Climate Center normals for Orlando (1991–2020) show a pronounced wet season, with June through September each averaging more than six inches of rain in the station record and annual precipitation around 51 inches. Add warm nights, afternoon storms, shade from oaks and palms, and irrigation heads that mist the walkway every morning, and the stone rarely gets a chance to dry out fully.
The pattern on a typical property is predictable:
- North-facing and shaded areas discolor first, especially walkways along the side of the house and patio edges under trees.
- Low spots where rinse or rain water pools stay green longest.
- Areas next to beds and turf pick up soil splash, fertilizer and irrigation overspray.
- Pits and holes turn dark first because they trap moisture and debris.
- Sunny, well-drained areas often stay cleaner for much longer.
Climate data explains the regional trend. It does not diagnose your patio. Clear daylight photos of each area, close-ups of the discoloration and notes about irrigation and shade will help a crew far more than a guess about what the stain is.
What you are actually looking at
Not every mark on travertine is the same problem, and that matters because the right answer changes.
- Green or gray film is usually algae or related organic growth. This is the core soft-wash job and often responds well.
- Black spots in the pits are often mildew or packed organic debris, and frequently improve with the right dwell time.
- Orange or brown blotches near sprinkler heads are often rust from irrigation water. These may only lighten, and the acid-based rust removers people reach for are exactly what damages travertine.
- Brown leaf-shaped marks under oaks are usually tannin staining.
- Dull patches or rings where something acidic spilled are etch marks. That is surface damage, not dirt, and cleaning will not reverse it. A stone restoration specialist is the right call.
- Loose, cracked or sunken pavers are an installation and base issue, not a cleaning issue.
Our related guide on paver algae and joint weeds in west Orlando covers concrete paver fields in more depth. This article stays on natural stone.
What soft wash means on travertine
Soft wash uses chemistry and dwell time as the main cleaning force rather than impact. On travertine, a responsible crew should be thinking about:
- Pressure range. Low pressure for application and rinsing, not a narrow tip held close to the stone.
- Stone-appropriate chemistry. Non-acidic products suited to calcareous stone, applied at the right strength and given time to work. The crew owns the product choice and the label instructions, not the homeowner.
- Joint sand. Whether the method will disturb it, and whether re-sanding is in or out of scope.
- Plants and turf. How beds and lawn edges will be pre-wet, protected and rinsed.
- Runoff. Where the rinse water goes. Florida DEP’s stormwater program exists because what washes into storm drains reaches lakes and waterways, so ask how the crew handles it near curbs and drains.
- Nearby surfaces. Screen enclosures, doors, painted walls and outdoor furniture.
Soft wash is not automatically gentle just because the phrase is on a flyer. Ask the crew to describe its process for travertine specifically. If the answer is the same as for a concrete driveway, keep comparing.
Why we do not publish DIY recipes
Searches for travertine cleaning turn up plenty of home mixes. We do not publish them. Improvised chlorine mixes can burn turf and ornamentals beside the patio, corrode metal fixtures and screen frames, and run into beds and drains. Household acids such as vinegar and lemon juice can etch the stone. The Natural Stone Institute also warns that many rust removers contain trace hydrofluoric acid, which attacks all stone, and that ammonia and bleach must never be mixed because the combination creates a toxic gas.
UF/IFAS Florida-Friendly Landscaping guidance is a good reference for protecting the plants and turf around your hardscape. It is not a cleaning manual, and the crew should own the chemistry.
Sealing is a separate decision
Some homeowners seal travertine to make cleaning easier or to deepen the color. Sealing is an adjacent service, not part of a basic soft wash, and it changes how the stone looks and how it handles water. If you are weighing it, read our guide on paver washing and sealing in west Orlando and ask the crew whether it offers sealing, what product type it would use on natural stone, and how long the stone needs to dry before any sealer goes down.
Travertine around a pool
Many lanai and patio installs surround a pool. Soft washing the stone is hardscape cleaning, not pool service. Ask how the crew will keep detergent and rinse water out of the pool and away from pool equipment, and confirm that water chemistry, equipment and weekly pool cleaning are outside the scope. If the pool itself needs attention, that is a job for a pool company.
What to include in your request
A good request gets a realistic scope back. Include:
- Your town or ZIP, for example Winter Garden, Horizon West, Windermere, Ocoee or Clermont
- Where the travertine is: walkway, entry, patio, lanai or pool deck
- Rough size if you know it, and whether it is tumbled, filled or polished
- Photos of the worst areas and any orange or brown marks
- Whether it has ever been sealed, and when
- Any HOA notice, listing date or event deadline
Expect follow-up questions about access, plants and drainage. A crew that tells you an etched or rust-stained area may only partly improve is being honest, not losing interest.
Get matched with a local soft-wash crew
If your travertine walkway or patio has gone green, black or slick, request a free match. You can also read more about our paver and driveway wash service. Tell us the surface, what you see and when you need it done, and we will match you with a local soft-wash crew serving Winter Garden, Horizon West, Clermont and nearby towns. The crew sets the price, schedule and safety process.
Can you pressure wash travertine pavers?
High pressure is a poor default on travertine. The stone is soft compared with concrete pavers, has natural holes and pits, and often sits on sand joints that blasting can wash out. A soft-wash crew relies on low pressure plus a stone-appropriate detergent and dwell time, and should explain its pressure range before it starts.
Why can't I use vinegar or an acid cleaner on travertine?
Travertine is a calcareous stone, made mostly of calcium carbonate. The Natural Stone Institute says calcium carbonate is sensitive to acidic solutions and recommends mild, non-acidic cleaners. Products containing lemon, vinegar or other acids can dull or etch the surface, and many rust removers contain acids that attack stone.
Why does my travertine turn green or black in Central Florida?
Warm temperatures, heavy wet-season rain, shade, irrigation overspray and leaf litter keep the stone damp, which lets algae and mildew film settle into its natural pores. Shaded walkways and patio edges under trees usually discolor first.
Will soft washing remove every stain from travertine?
Not always. Organic film from algae and mildew usually responds well. Rust from irrigation water, oak tannin, oil, and acid etch marks are different problems that may only lighten, or may need a stone restoration specialist rather than a cleaning crew.
Do you clean travertine yourselves?
No. Orlando West Soft Wash is a matching service. We connect you with a local soft-wash crew in Winter Garden, Horizon West, Clermont and nearby towns, and the crew sets the scope, price and schedule.
Sources
- Natural Stone Institute — Learn about cleaning products for natural stone
- Florida Climate Center — 1991–2020 climate normals, Orlando
- UF/IFAS Florida-Friendly Landscaping Program
- Florida Department of Environmental Protection — NPDES Stormwater Program