Is sandstone or travertine better around a salt water pool?

Both can work. Travertine generally copes well with salt when its holes are filled and it is sealed. Sandstone varies more: dense grades perform well, while soft, absorbent sandstone is vulnerable to salt attack unless it is deeply sealed, ideally dip-sealed before laying.

Which stone is cooler underfoot?

Colour and shade matter more than stone type. Pale sandstone and pale travertine both stay noticeably more comfortable than dark stone such as bluestone or granite, but any stone in full summer sun gets warm. Enhancing sealers deepen colour and can make the surface feel warmer.

Can I use acid to clean travertine or sandstone pool coping?

No. Acid etches travertine, which is calcium carbonate, and it attacks the binder in sandstone, which can release orange iron staining. Use a pH-neutral or stone-specific alkaline cleaner instead.

Is honed travertine too slippery for a pool surround?

It can be when wet. Tumbled and textured finishes usually grip better. Summaries of Standards Australia's HB 198 suggest P4 or Class B barefoot for pool surrounds, so ask your supplier for the stone's slip classification and confirm requirements with your designer or builder.

Do both stones need sealing around a pool?

In practice, yes. A penetrating sealer slows salt water, oils and sunscreen from soaking in while letting the stone breathe. It does not make the stone salt-proof, so regular fresh-water rinsing and balanced pool chemistry still matter.

Can damaged coping be restored, or does it need replacing?

It depends on the depth of damage. Travertine can often be honed and refilled. Lightly affected sandstone can be cleaned, desalinated and sealed. Badly spalled pieces of either stone usually need replacing by a stonemason or pool builder before the area is sealed.

Sandstone vs Travertine Pool Surrounds Compared

The Prestige Standard stone-care team · Published 5 November 2026 · Updated 5 November 2026 · 9 min read

Sandstone vs travertine pool surrounds: how they compare — Illustrative image.

Two stones, two chemistries

The most useful way to compare these stones is to start with what they are made of, because almost every difference in how they behave around a pool follows from it.

Sandstone, including the Hawkesbury sandstone quarried around Sydney, is made mostly of quartz grains held together by a softer natural binder of clay and iron-bearing minerals. Quartz itself is hard and chemically tough. The binder is the weak point: it is what gives way when sandstone is scrubbed too hard, blasted with a narrow pressure jet or washed with acid, and it is where the stone's honey, ochre and rust-coloured banding comes from.

Travertine is a form of limestone. It is made mainly of calcium carbonate, deposited where mineral-rich spring water releases carbon dioxide and leaves the dissolved carbonate behind. That origin explains its characteristic holes and voids, and it explains its main weakness: calcium carbonate reacts with acids. Anything acidic, from a pool-shop tile cleaner to badly balanced pool water, can dull or etch the surface.

Both stones are porous, which means both absorb water and whatever is dissolved in it. How porous varies a great deal between quarries, grades and finishes, so treat any blanket statement that one stone is always denser than the other with some caution. What matters on your project is the particular stone you have or are choosing, and how it has been prepared and sealed.

Around salt and chlorine pools

Most pools in the Eastern Suburbs and Northern Beaches are now salt-chlorinated. A salt chlorinator typically runs the water at a few thousand parts per million of salt, commonly cited as around 3,000 to 5,000 ppm. That is roughly a tenth of the salinity of seawater, but concentration is not the whole story. Every time splash water dries on the coping, the salt it carried stays behind, and over months it builds up in the pores of the stone.

When that salt crystallises inside the stone rather than on the surface, the growing crystals push against the pore walls. Repeated wetting and drying is the driver. The result, called salt attack, shows up as pitting, flaking or a sugary, crumbling surface, usually starting along the waterline edge and the nose of the coping. We cover the mechanism and the repair options in detail in our guide to salt attack on pool coping.

How each stone responds

Both stones are vulnerable to salt attack when they are unsealed or under-sealed. Softer, more absorbent sandstones are generally the more exposed of the two, which is why some Australian stone suppliers flag sandstone as a choice to check carefully around salt pools, and why sealer manufacturer Dry-Treat recommends dip-sealing soft stone coping before it is laid in harsh saltwater settings. Dense, well-selected sandstone, properly sealed, can perform well. Poorly chosen soft sandstone around a salt pool is one of the most common failures we are called to.

Travertine tends to cope better with salt where it has been well filled and sealed, but it carries its own pool-specific risk: acid. Water with a low pH can etch calcium carbonate, and pool chemistry that drifts acidic, or acid dosing splashed onto the coping, leaves dull, rough patches. NSW council guidance for public pools recommends keeping pH between 7.2 and 7.6 and notes that low pH can etch pool surfaces. Your pool professional will set the target range for your pool, but the principle holds: travertine coping benefits from steady, balanced water.

Chlorine-only pools

A traditionally chlorinated pool adds less salt to the stone, but it is not risk-free. Chlorine products, acid used to correct pH, and the minerals in the water itself all end up on the coping. Sealing and rinsing still matter, just with a little more margin.

Heat underfoot

Barefoot comfort is often the deciding factor for families, and here the honest answer is that colour, finish and shade matter more than the stone type.

Both stones are usually supplied in pale, warm tones, and pale stone absorbs less of the sun's heat than dark stone. Suppliers describe both as comfortable choices: Gosford Quarries says sandstone stays cooler in direct sun than bluestone or granite, and Stone Depot lists travertine and limestone among the cooler options. Neither claim means the stone stays cool on a still January afternoon in full sun. Any stone in direct summer sun gets warm.

A few practical points help more than the choice of stone:

Choose the paler end of the range for areas in full afternoon sun.
Remember that enhancing sealers deepen the colour, which can make the surface feel warmer. Test a patch before committing.
Shade sails, trees and pergolas over the main walkways make a far bigger difference than switching stones.
Splashing the coping with pool water cools it quickly, but it also adds salt. Rinse with fresh water at the end of the day.

Slip resistance and finish

Slip resistance is set mainly by the surface finish, not the stone name. A tumbled or textured travertine and a sawn or textured sandstone can both grip well. A smooth honed finish on either stone can be slippery when wet, and suppliers disagree about whether honed surfaces suit pool surrounds at all.

Australian Standard AS 4586 classifies the slip resistance of new pedestrian surfaces, and Standards Australia's handbook SA HB 198:2014 recommends minimum classifications for different locations. Summaries of HB 198 list P4 (or Class B barefoot) for swimming pool surrounds, and P5 (Class C) for pool ramps and stairs leading into water. HB 198 is guidance; whether a rating is required on your project is a question for your designer, builder or certifier. Our regulations page sets this out.

Sealing affects slip too. Glossy, film-forming coatings can make either stone slippery when wet, and they trap moisture and salt beneath the film. Penetrating sealers sit inside the stone and generally keep its natural texture. Around pools and on steps, test the finish on a patch before sealing the whole area.

Sealing each stone for a pool

For both stones, the right product is a penetrating sealer, also called an impregnator, that lines the pores rather than coating the surface. It slows the entry of salt water, sunscreen and food oils while letting moisture vapour escape. Our guide to penetrating vs enhancing sealers explains the options.

Sandstone

Sandstone's absorbency means the depth of penetration matters. Dry-Treat's technical guidance for soft sandstone near salt water calls for deep penetration, and notes that a thin treated layer can actually encourage salt to crystallise just beneath it and lift the surface. For new installations around salt pools, dip-sealing the coping before laying, or sealing all faces including cut edges, gives the best start. On existing coping, preparation and the number of coats matter more than the brand.

Travertine

Travertine needs its holes dealt with before sealing. Open voids collect dirt and salt water and break down faster, so they are usually filled with a colour-matched filler first. The sealer then goes onto clean, fully dry stone. Avoid any cleaner or sealer prep product that is acidic. Our travertine sealing and sandstone sealing services use impregnators chosen for salt exposure.

No sealer makes either stone salt-proof. Sealing buys time and reduces how much salt gets in; rinsing and good pool chemistry do the rest. How often to re-seal depends on the product, the exposure and the traffic, and a simple water-drop test tells you when protection has dropped off. See how often to seal travertine for the test.

How each stone ages

Both stones age well when they are looked after, but they age differently.

Sandstone develops a patina over time. The colour softens and the iron banding can deepen. Its weak points are erosion of the binder, which leaves a sandy, powdery surface, and black mould or lichen on shaded edges. Sandstone that has been pressure-washed with a narrow tip ages badly: it stays rough, collects dirt faster and grows mould sooner. Well-cared-for sandstone coping can be cleaned back to a warm, even colour many times over.

Travertine tends to hold its colour, but the filler in its holes gradually washes out, leaving open pits. Etch marks from acidic spills or water accumulate as dull patches. The good news is that travertine's surface can be renewed: diamond honing removes a fine layer and brings back an even finish, and holes can be refilled. Our travertine honing service covers this.

In both cases, the worst ageing comes from salt attack that went unnoticed for years. Once the surface has spalled, sealing can slow further damage but cannot rebuild what has been lost.

Sandstone and travertine side by side

Sandstone and travertine as pool surrounds: a practical comparison
Factor	Sandstone	Travertine
What it is	Quartz grains in a softer clay and iron-mineral binder	A limestone, mainly calcium carbonate, with natural voids
Salt pools	Softer grades are vulnerable to salt attack; choose dense stone and seal deeply	Copes well when filled and sealed; still vulnerable if left unsealed
Acid and low pH	Acid attacks the binder and can release iron staining	Acid etches the surface; balanced pool chemistry matters most
Heat underfoot	Pale tones stay comfortable compared with dark stone	Pale tones stay comfortable compared with dark stone
Slip	Natural texture grips well; smooth finishes need checking	Tumbled or textured finishes grip well; honed can be slippery wet
Sealing	Deep penetrating sealer; dip-seal new coping for salt pools	Fill holes, then penetrating sealer; no acidic prep
Routine cleaning	Low pressure only; pH-neutral cleaner; biocide for growth	pH-neutral or alkaline stone cleaner; never acid
Typical ageing	Patina and deeper banding; risk of powdering and mould	Colour holds; filler washes out; etch marks accumulate
Renewal options	Careful cleaning, poultices, repair or piece replacement	Honing, refilling, piece replacement

Neither column is a verdict. A well-chosen, well-sealed sandstone will outlast a poorly installed travertine, and the reverse is equally true.

What you can do yourself

Whichever stone you have, most of the protection comes from simple habits.

Rinse with fresh water. After heavy pool use and on hot, dry days, rinse salt splash off the coping, concentrating on the waterline edge. A watering can or a hose with a trigger nozzle is enough.
Keep the water balanced. Test regularly, keep salt at the level your chlorinator manufacturer specifies rather than topping up generously, and keep acid dosing away from the coping.
Clean gently. Use a pH-neutral stone cleaner and a soft brush. No vinegar, bleach, brick cleaner or pool-shop acid on either stone.
Watch the water-drop test. Once a year, drip water on the coping. If it darkens the stone instead of beading, the sealer needs renewing.
Look along the edge. Check the nose and waterline edge each season for pitting, flaking or a sugary feel. Early salt damage is far easier to manage than late.
Keep run-off out of the drain. Wash water from cleaning should not go into the stormwater system.

Choosing new stone? Ask the supplier for its slip classification, whether it has been tested for salt resistance, and whether the coping can be dip-sealed before laying.

When to call a specialist

Call a specialist when:

the coping is pitting, flaking or crumbling, especially along the waterline;
a white crust keeps returning after it dries;
travertine has dull etch marks that do not wash off, or many open holes;
an old glossy coating is peeling, cloudy or slippery;
pieces sound hollow or move underfoot, which needs re-bedding by a tiler or pool builder first;
you are building or renovating, and want the coping sealed properly before or after laying.

Our pool coping service covers both stones: an acid-free clean for travertine, low-pressure cleaning for sandstone, hole filling, and a penetrating sealer chosen for salt exposure, with the pool protected throughout. We work across the Eastern Suburbs and Northern Beaches. Get in touch for an inspection and a written quote.

Sandstone vs travertine pool surrounds: how they compare