Carved stone cold plunge basins across Africa

What a stone basin is, in numbers

A one- or two-person bowl cut from a single block, honed inside and left split outside, with a chiller, circulation, filtration and ozone behind it. Indicatively USD 7,000–13,000 supplied and installed, which places it between a chilled clad tub and a small plunge pool; each country page shows the band in local currency.

Empty, it weighs several tonnes. That single fact shapes everything else on this page.

Which stone, in which country

• Seychelles: pink-grey granite, often from a boulder already on the plot — see granite plunge basins in the Seychelles.
• Mauritius and Kenya: black volcanic basalt, dense and fine-grained.
• Zanzibar: pale coral stone, the material Stone Town is built from.
• Egypt: alabaster, worked by specialist carvers — see alabaster stonework in Egypt.
• Lagos: cast terrazzo, lighter than solid stone on a tower terrace.
• Anywhere: marble, cut and honed in our Istanbul factory.

Salt air does nothing to any of them, so a beach plot is no reason to avoid stone. The two calcite stones, alabaster and coral, dislike acid, which is why the water chemistry is kept neutral.

Local stonemason, factory marble, our crew

Shipping a raw basalt or granite block to Istanbul and back would be absurd, so local stones are cut near the site by a specialist stonemason working to our drawing and bowl profile. Marble is the exception: it is cut in-house and travels crated with the cabin and the plant.

Whoever holds the chisel, our crew does the engineering that turns a bowl into a plunge: rigid insulation and a waterproof backing behind the stone, pipework through the base, the chiller and its enclosure, commissioning and handover. You approve the profile drawing and photographs of the actual block before any cutting starts.

Why the stone needs a lining behind it

Stone stores cold superbly and keeps none of it on its own. Unlined, it leaks cold into the ground and the air all day and the compressor makes up the difference. Lined, the mass works for you: once the basin is down to temperature under a closed lid it barely moves overnight, and its monthly running cost ends up below that of a light clad tub.

Structure first, then the order

At ground level over rock there is nothing to discuss. On a suspended slab, a tower terrace, a balcony or a timber deck we want an engineer's opinion before we quote, and we will not place a stone basin on a structure nobody has checked. Where it cannot carry the load, a clad tub or Lagos terrazzo is the honest substitute.

Lead time follows the rest of the room — six to ten weeks after drawing approval, plus shipping — and on an island the barge deck sets the largest block we can quote. The long read on all of these stones is stone of the continent. Send a photo of the spot, and of the boulder if there is one: we reply with pictures of finished basins and a first budget.

In short

• Granite, basalt, coral stone, alabaster, terrazzo or factory-cut marble
• Honed bowl, split outer faces, a profile you approve before cutting
• Rigid insulation and a waterproof backing behind the stone
• Engineer's opinion on any suspended structure before we quote