Marble and Travertine in the Aegean: Sun, Wind and Hard Water

Along the Aegean coast, stone is everywhere in daily life: marble and travertine are widely used around the pools of holiday complexes, in the entrances of city apartment buildings, on hotel terraces and in home bathrooms. The region is also home to some of these stones' own quarries; it is known for Denizli travertine and for the marble quarries in and around Muğla. However, the Aegean's climate and water place a particular burden on these stones. Hard water leaves white marks on surfaces, the strong summer sun affects the stone's color and fillers, and wind-blown sand and dust abrade the surface. In this article we look at these three factors one by one, show the differences between holiday homes and city buildings, and offer care recommendations by stone type.

In short: The three main problems of marble and travertine in the Aegean are the white marks left by hard water, color change and filler yellowing caused by the sun, and surface abrasion from wind-blown sand. Limescale is managed mechanically and with preventive drying, not with acid; in sun-exposed areas durable fillers and sealers are chosen, and at entrances sand is kept at the door.

The Three Factors That Shape Stone in the Aegean

The Aegean coastline has a typical Mediterranean climate, with long, dry summers and mild, rainy winters. In summer the sun heats stone surfaces for hours, the wind blowing all day carries dust and sand, and watered gardens and used pools wet the stone with hard water in the evenings. In winter, rain sends water into the stone's pores, and frost can occur in some inland areas.

These factors reinforce one another. Hard water spilled onto a travertine pool edge heated by the sun evaporates quickly and leaves a white ring behind. Sand brought by the wind sticks onto this ring and, rubbed by shoes, dulls the surface. If an acidic product is used at the next cleaning to remove the limescale mark, the stone's surface is permanently etched.

That is why stone care in the Aegean is less about solving a single problem than about breaking the links of this chain one by one. Preventing hard water from drying on the stone, choosing sun-resistant materials and keeping sand at the door are each simple on their own, but decisive together.

Hard Water: Where Do the White Marks Come From?

Water hardness is measured by the amount of dissolved calcium and magnesium salts it contains. In Turkey, hardness is usually expressed in French degrees of hardness; a hardness equivalent to 10 milligrams of calcium carbonate in one liter of water corresponds to one French degree. In many parts of the Aegean, well water and mains water can be hard; hardness varies from place to place and from source to source. You can find out how hard your home's water is from the local water authority's analysis results or with a simple test kit.

When hard water dries on stone, the minerals in it remain as a white deposit. This deposit is most often seen where water repeatedly wets and dries the surface. The main sources of limescale marks in Aegean homes and complexes are:

• Shower and bathroom: The shower tray, wall cladding and the area around the sink get wet and dry with every use; limescale marks first appear in the joints and at the spots where water drops dry.
• Pool edge: Water splashed from the pool and carried by wet feet evaporates quickly in the sun, leaving white rings on the travertine coping stones.
• Garden irrigation: Water from sprinklers and drip irrigation systems that touches stone walls and garden paths forms noticeable limescale stains over time.
• Kitchen countertop: Water drops that collect under glasses and kettles and at the edge of the sink leave dull rings on granite and marble countertops.
• Air conditioner and gutter drips: Water constantly dripping from an air conditioner's outdoor unit or a gutter can leave a limescale mark concentrated at one spot on the stone below.

We explained in detail how to recognize and clean limescale marks on countertops in our article on limescale and water marks on granite countertops in detail.

Managing Limescale Without Damaging the Stone

Limescale deposit is chemically largely calcium carbonate, and so are marble and travertine. That is why any acid that dissolves limescale dissolves the stone at the same time. Limescale removers from supermarket shelves, vinegar and citric acid leave a permanent acid mark on marble and travertine in place of the limescale mark. We also covered the effect of these products on stone separately in our article on cleaning chemistry as well.

The most effective way to fight limescale is prevention. Drying the stone with a squeegee and a dry cloth after a shower, rinsing the pool edge with clean water and drying it in the evenings, and adjusting sprinklers so they do not touch stone surfaces noticeably reduce limescale buildup. Using a water softening system at home can also slow the formation of limescale marks in the bathroom and kitchen.

For accumulated limescale, mechanical methods are used. Thin deposits can be removed patiently with a plastic spatula, a soft pad and a pH-neutral stone cleaner. For thickened limescale layers embedded in the stone's texture, the surface is renewed in a controlled way with suitable diamond pads; this process removes acid marks along with the limescale and restores the stone's original appearance. On stones that do not contain calcite, such as granite, some special limescale cleaners can be used in a controlled way, but grout and resin fillers must also be taken into account.

Sun: Color, Heat and Fillers

The Aegean's summer sun heats outdoor stone surfaces for long hours. Heated stone expands and contracts in the cool of night. This daily movement usually causes no problem for sound stone, but it stresses the joints and, especially in paving with narrow joints or none at all, can cause breakage at slab edges. Dark stones heat up much more than light ones; if people will walk barefoot around the pool and on terraces, this difference must be taken into account separately.

The sun's effect on the stone's color is more complex. Some marbles and travertines contain iron minerals in their structure. These minerals can react with moisture and oxygen and lead over time to a yellowish or brownish discoloration; sun and heat are thought to speed up this process. The yellowing seen over time on light stones outdoors is often the result of this oxidation. Conversely, some dark and colored stones can fade when exposed to the sun for a long time.

The sun's most noticeable effect is seen in fillers. Some resins used to fill travertine's pores or repair cracks yellow or darken when exposed to ultraviolet light for a long time. A filler that keeps its color for years indoors can stand out clearly from the stone within a few summers on a sun-exposed terrace. That is why the light resistance of fillers and sealers to be used outdoors should be checked in the product documentation.

Wind and Sand: A Silent Sandpaper

The winds blowing throughout summer in the Aegean carry fine sand and dust onto stone surfaces, especially at buildings close to the coast and next to the beach. The afternoon sea breeze (imbat), blowing from sea to land, leaves these fine grains on coastal terraces and entrances. Sand does not harm stone by itself, but when it is rubbed on the stone under shoes, it acts like sandpaper.

The most visible sign of this abrasion is the dulled strips seen at doorways and along heavy walking lines. On a polished marble entrance, these strips become noticeable within a few summers. Wind-blown dust settling into porous travertine creates a grayish dullness on the surface and suppresses the stone's natural color.

Keeping sand at the door is the simplest way to reduce this abrasion. A coarse mat at the outer entrance, an absorbent mat just inside the door, and dry sweeping or vacuuming before wet mopping on terraces prevent a significant part of the abrasion. Wiping a sandy floor with a wet mop drags the sand across the surface and creates scratches. In holiday homes near the beach, a foot shower or foot-washing point noticeably reduces the amount of sand carried into the house.

Holiday Homes and City Buildings: Different Use, Different Plan

When people talk about stone care in the Aegean, holiday homes come to mind first; but apartment buildings, workplaces and public buildings in cities such as İzmir, Aydın, Manisa, Denizli and Muğla are also under the influence of the same climate. Because the way they are used differs, the care plan differs as well.

In holiday homes, the load is concentrated in a short period. Between June and September the house is crowded, the pool and terrace are in constant use, and sand and sunscreen are carried onto the stone; then the house stays closed for months. In this pattern, the best timing is a thorough cleaning and, where needed, surface renewal at the end of the season, and a sealer check and a light refresh before the season. Airing the interior of a closed house from time to time prevents damp and mold stains. In complexes with many holiday homes, having the management set up a single care schedule for the shared pool edge, walkways and entrances gives a more orderly and more economical result than each home dealing with it separately. A walk-through of the common areas at the end of the season reveals joint and filler problems that could grow over the winter at an early stage.

In city buildings, the load is more regular throughout the year. Abrasion from sand and dust stands out at apartment entrances and on stairs, traces of hard water in bathrooms and kitchens, and sun effects on south-facing balconies. Here, a regular care schedule, more frequent polish renewal for heavily trafficked entrances, and proper product training for fighting limescale in wet areas are important.

The table below summarizes the problems commonly seen in the Aegean, with their symptoms and countermeasures:

Short Notes by Stone Type

Marble and travertine, the two stones most commonly used in the Aegean, react to these factors in different ways. Polished marble shows limescale marks and acid damage very quickly; outdoors and in wet areas, a honed or matte finish is both safer and requires less maintenance. For white and light-colored marbles, the risk of yellowing should also be taken into account in outdoor use.

Travertine, on the other hand, absorbs hard water, dust, and sunscreen more easily because of its porous structure. In filled travertine, the condition of the filler is the focus of maintenance; in unfilled travertine, it is the dirt and limescale that build up in the pores. We covered the maintenance of unfilled travertine in detail in our article on unfilled travertine in detail. Granite, for its part, is more resistant to limescale and acid, but polished granite is also slippery when wet, and limescale marks are clearly visible on dark colors.

If you notice limescale, discoloration, or wear on the stone surfaces of your summer house in the Aegean or your building in the city, you can send photos of the areas and details of how they are used through the service request form and we will recommend a maintenance plan suited to your stone.