Travertine forms from hardened mineral deposits left behind when carbon dioxide rich water filters down through rock and earth. Passing through limestone, the water dissolves it. When that saturated water reaches the surface, the change in temperature and pressure releases the carbon dioxide, and as it fizzes out the limestone is left behind and recrystallizes – often over underwater plants and organic material.
Those escaping gas bubbles are why travertine looks the way it does. The fissures and small irregular holes across the face of the tile are the fossilized record of that process, and they are what distinguish travertine from the limestone it came from.
Filled or unfilled
Those natural holes are either left open or filled at the factory, usually with a cement or resin matched to the stone.
Filled travertine gives a smoother, more uniform surface that is easier to clean and more practical for floors and countertops. Worth knowing: the fill is not the same material as the stone. Over years of traffic some fills work loose and pop out, which is normal and repairable with a matching filler rather than a sign of a failed installation.
Unfilled travertine keeps the open texture and a more rustic, older look. It offers better slip resistance, and it collects everything. We rarely recommend it for a kitchen floor and often like it on a patio or a feature wall.
Finishes
- Polished – buffed to a shine. Formal, and it shows etching most readily.
- Honed – flat and matte. The most common choice, and the most forgiving day to day.
- Brushed – lightly textured with abrasive brushes. Soft, aged appearance.
- Tumbled – tumbled with grit to round the edges and rough the face. The classic Old World look, and the most slip resistant of the four.
Travertine is also cut two ways. Cross-cut slices across the bed and gives the cloudy, flowery pattern most people picture. Vein-cut slices along the bed and produces a linear, striated grain that looks far more contemporary. Same stone, completely different room.
Travertine etches
Travertine is calcium carbonate, and calcium carbonate reacts with acid. Lemon juice, vinegar, wine, tomato, many common bathroom and kitchen cleaners – any of them will dull the surface where they sit. That dull mark is an etch, and it is not a stain. The acid has physically eaten into the stone, so cleaning will not remove it. It has to be honed and refinished.
Sealing helps with stains. It does not prevent etching. Anyone who tells you a sealer makes travertine acid-proof is selling something.
None of this makes travertine a bad choice. It’s just a stone with rules:
- Use a pH-neutral stone cleaner and nothing else. No vinegar, no bleach, no general-purpose spray.
- Wipe spills quickly, particularly citrus, wine and anything tomato based.
- For kitchen countertops we generally steer people to granite tile, which shrugs off acids that would etch travertine.
- A honed or tumbled finish disguises minor etching far better than a polished one.
Where travertine works
It is at its best in bathrooms – floors, shower walls, tub surrounds, vanity backsplashes. The color palette is warm and quiet, it suits both traditional and modern rooms, and it is genuinely beautiful in a way manufactured tile has to work hard to imitate. It also makes an excellent fireplace surround and a handsome entry.
Travertine is softer than granite, roughly 3 to 4 on the Mohs scale, so it will scratch more easily and does not belong in the highest-traffic commercial floors. In a house it holds up fine.
Outdoors in Northern Colorado it needs care. Travertine is porous, and water that soaks in and freezes will break stone. If you want travertine on a patio it should be a dense unfilled grade, properly set and drained, and it is still more risk than granite would be. We will tell you honestly whether a particular installation is a good idea.
Sealing and maintenance
Travertine must be sealed. We use a penetrating sealer, applied before grouting so the grout does not stain the face, then again afterward. Resealing frequency depends on traffic and finish. We will discuss this with you in-depth so you have a full understanding of your specific installation’s requirements.
Day to day it wants a pH-neutral stone cleaner, a dust mop, and mats at the doors. The main enemies are acids and grit.
Grout matters on travertine because the joints are usually tight and the color match is close. We use a stain-proof or epoxy grout on most stone work so the joints do not absorb or discolor – the reasoning is in our guide to picking the perfect grout.
How we install travertine
Stone telegraphs whatever is under it, so the substrate is checked for flatness and deflection before anything is set. We dry-lay travertine before installing, because the color and pattern shift noticeably between crates and you want that variation distributed on purpose. Light stone goes over white thinset so the mortar does not shadow through the tile.
In a shower, the waterproofing behind the stone matters more than it does anywhere else. We normally use the Schluter Kerdi membrane rather than a liquid-applied product – our Kerdi shower preparation page explains what that involves. For showers generally see shower tile, and for bathrooms bathroom tile.
Front Range floors move – expansive soils and big seasonal swings – and a stone installation that does not accommodate that movement is where cracks come from.
Travertine tile installation in Fort Collins and Northern Colorado
We have been installing tile and stone since 1998. TileArt is Certified Tile Installer (CTI #847) through the Ceramic Tile Education Foundation and holds Certified Stone Specialist credentials through the University of Ceramic Tile and Stone.
If you are considering travertine for a bathroom, a shower, a fireplace or a floor in Fort Collins or anywhere in Northern Colorado, fill out our contact form or give us a call. To compare it against the other stone options, start with natural stone.
