Corner of the superyacht sauna with continuous LED strips along the timber benches

[ Project ]

Private Superyacht Spa — Built with Turquoise Yachts

Istanbul · Türkiye

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Sauna Dekor Spa Solutions — designing, manufacturing and installing saunas, steam rooms, hammams and pools since 1987, in our own facility in İkitelli OSB, Istanbul.

A sauna built into a private superyacht with Turquoise Yachts in Istanbul — weight, motion, marine ventilation and fire-safe material selection.

Sauna

[ 9 photos ]

From the project

Superyacht sauna interior with tiered timber benches and a dark marble reveal — Sauna

Curved glass entrance to the superyacht sauna, with warm LED-lit timber benches — Sauna

Superyacht spa entrance with the sauna on one side and a mosaic steam room on the other — Steam room

Curved timber sauna benches with LED strip lighting in a superyacht spa — Sauna

Superyacht sauna with curved glass doors, timber benches and a black marble surround — Sauna

Superyacht sauna with a black mosaic wall and a stainless steel heater beside the benches — Sauna

Curved timber bench and blue mosaic wall in the superyacht spa

Timber sauna with backlit bench edges and a headrest aboard the superyacht — Sauna

[ The build ]

A Finnish sauna built into a private superyacht

This is a Sauna Dekor project. We are a manufacturer first and a turnkey wet-area contractor second: cabins, benching, marble and mosaic are made in our own Istanbul workshop, then installed by our own crews. Founded 1987, 40th year, work delivered in 41+ countries.

This project is a sauna built into a private superyacht, delivered with the shipyardTurquoise Yachts in Istanbul. The owner is not named. The zone listed for the project is asauna, and our photographic record runs to eight frames.

Scope of work: the marine Finnish sauna cabin, heater, control and yacht interfaces

A dry-heat cabin built into a vessel rather than a building: cabin structure and insulated build-up, internal linings and benching, heater and control, glazing, lighting, and the interfaces with the yacht’s own ventilation and electrical systems. The cabin was made anddry-assembled in our Istanbul workshop and installed in coordination with the shipyard’sprogramme.

Weight, motion and fixing

Three things separate a marine sauna from a domestic one. Weight is a design constraint rather than an afterthought, so linings and framing are engineered for the lightest build-up that still gives the thermal performance — every kilogram above the waterline is paid for somewhere. Motion means nothing can rely on gravity: benches, guards, the heater and its surround are mechanically fixed for a vessel that rolls, and loose items such as buckets andladles need stowage rather than a shelf. And the whole assembly has to survive a hull thatflexes, so junctions between the cabin and the yacht’s structure are detailed to move without opening a gap in the vapour barrier.

Finnish sauna ventilation and the vapour barrier at sea

A yacht has no spare external wall and no tolerance for humidity escaping into adjoiningspaces, so the cabin’s air path is designed with the vessel’s HVAC rather than around it:supply low near the heater, extract low on the opposite side, both connected into the yacht’ssystem so warm moist air is taken away rather than pushed into a corridor. The vapour barrier matters more here than anywhere: a continuous foil layer with taped laps behind a ventilated cavity is what keeps moisture out of the yacht’s insulation and joinery, and on a vessel that insulation is also acoustic and fire-related. Seesauna ventilation.

Timber, heat load and safety in a marine Finnish sauna

Timber is kiln-dried and low in resin with concealed fixings, so nothing hot meets skin, and material selection is agreed with the shipyard because marine fire regulations govern what maybe used in a vessel’s interior — a decision that belongs to the yard’s certification path, notto us alone. General practice sizes a cabin at roughly a kilowatt of stone-heater output percubic metre of volume with additions for glazing; on a yacht the available electrical load is usually the binding constraint, so heater rating is confirmed against the vessel’s power budget before the cabin is designed. Product page:Finnish sauna.

What we solved on site

A shipyard programme does not wait, and access to a fitted-out vessel is narrow in every sense. We built and dry-assembled the cabin in ourIstanbul workshop, confirmed every joint there,then dismantled it into pieces that would pass through the yacht’s access route and numbered them for reassembly in sequence. Nothing was cut on board. Seeservices andprivate spa.

Frequently asked questions

What makes a sauna on a yacht different?

Weight, motion and flex. The build-up is engineered as light as the thermal performance allows, everything is mechanically fixed for a vessel that rolls, and junctions with the hull are detailed to move without opening the vapour barrier.

How is a marine sauna ventilated?

Into the vessel’s own HVAC. Supply low near the heater and extract low opposite, both connected to the yacht’s system so warm moist air is removed rather than pushed into an adjoining space.

Who decides which materials are allowed on board?

The shipyard, through its certification path. Marine fire regulations govern what may be used in a vessel’s interior, so material selection is agreed with the yard rather than specified independently.

What usually limits the heater size on a yacht?

The vessel’s power budget. The rating is confirmed against available electrical load before the cabin is designed, rather than calculated from volume alone and fitted afterwards.

Sauna Dekor’s own certification is TS EN ISO 9001:2015 quality management, covering sauna and spa product manufacturing and after-sales service. The equipment we install carries CE / EN 60335, TÜV, GS, GREENGUARD Gold, FSC and VDI 6022 certification from its own manufacturers — EOS, Sentiotec and Condair among them.