Range 05 · 4.5–23.9m²

Cave saunas: the outdoor sauna, reinvented

An outdoor sauna unlike any other — the home sauna, taken underground. Earth-sheltered cave saunas hold heat and silence the way barrel and cabin saunas never can — domed vaults circulate steam like nothing else on the market.

From £30,000
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Official UK Partner of Revonia  ·  1,500+ projects across Europe  ·  25-year structural warranty  ·  Planning handled for you
Outdoor cave sauna interior with domed vault, wooden benches and stoveASSET IN FOLDER → ../Sauna Homepage.jpg (temp hero — replace with retouched final)

The Physics

Why earth-sheltered saunas hold heat better

A barrel sauna fights the weather; a cabin sauna leaks heat through every wall. A cave sauna is wrapped in earth — the best insulator there is. It heats faster, holds temperature longer, uses less wood or power, and the domed vault rolls steam around the room instead of trapping it at the ceiling.

Beyond the Löyly

Sauna, spa or wellness room

The larger configurations pair the sauna with spa rooms, showers and kitchens — a wellness suite in the garden. Training at home too? Pair it with a garden gym.

Cave sauna interior: vaulted ceiling, cedar benches and concealed lightingASSET: sauna-interior.webp — final
Cave sauna exterior: earth-covered mound with arched glass entrance and twin chimneysASSET: sauna-exterior.webp — final
Sauna spa room with shower, vaulted plaster ceiling and sauna doorASSET: sauna-spa-room.webp — final

The Journey

From order to first sauna

Scoping call, design, siting, install — the modules arrive finished and connect in days. The full process is on how it works.

FAQ

Your questions, answered

Wood-fired or electric?

Both are available. Wood-burning stoves are hand-matched to the room volume; electric heaters suit sites where flues are impractical.

Does an outdoor sauna need planning permission?

Smaller cave saunas often fall within permitted development. Where consent is needed we handle it end to end — see the planning guide.

What maintenance does it need?

Very little. The concrete vault does not rot, warp or need retreating like timber saunas; interior woodwork needs only the care of any quality sauna.

More questions? See the full FAQ.

Heat, silence, earth

Book a scoping call to plan your cave sauna — or download the brochure to see every configuration.

Book a Scoping CallDownload the Brochure