Barrel Sauna doesn’t just build outdoor projects — we also build custom-designed premium saunas inside existing buildings. We turn any room you choose in your home, villa, hotel or spa into a fully functional, luxurious wellness corner.
Each sauna is built from scratch to fit the room’s dimensions and design.
The most important detail of a sauna built inside a room is protecting the existing walls. Between the room walls and the sauna frame we build a multilayer insulation system of mineral stone wool and a moisture-resistant membrane. It keeps the heat in for fast heat-up and fully protects your walls from steam and humidity.
The cabin interior is built from eco-friendly linden — the healthiest material for a sauna. For an even more premium project we offer cedar, abachi or teak.
Linden releases no resin, has a smooth surface and an eco-friendly structure — the ideal, traditional sauna lining. Its light tone makes the room bright and airy, and it does not burn the skin even at high temperatures.
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Thermo linden goes through a special heat-treatment process that gives it exceptional resistance to moisture, rot and deformation. Its distinctive dark caramel colour and light, pleasant scent create a warm, luxurious atmosphere.
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With very low thermal conductivity, abachi stays cool to the touch even at high temperatures — which makes it the world’s number-one material for sauna benches. Completely knot-free, soft and splinter-free, it is perfectly comfortable and safe against bare skin.
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Natural essential oils in cedar create an antibacterial environment and a unique, relaxing aromatherapy effect. Its high natural resistance to moisture, mould and fungi makes it the go-to material for long-lasting premium projects.
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Built from whole logs of pure linden, the “Wild Sauna” brings a true forest atmosphere with its raw, unprocessed texture and unmistakable scent of wood. The massive linden trunks provide excellent insulation and make you feel as if you were in the middle of the wilderness.
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Decorative stone, Himalayan salt panels, log-cut décor and hidden LED lighting give every sauna its own character.
Any room or free space in a home, villa, hotel or spa. The sauna is built from scratch to fit the room; we plan ventilation and electrical supply together during design.
No. A multilayer insulation of mineral stone wool and a moisture-resistant membrane is built between the walls and the sauna frame, fully protecting them from steam and humidity.
Linden is the traditional, healthy choice. Thermo linden is more moisture-resistant, abachi stays cool for benches, and cedar adds aromatherapy. The wild sauna uses whole logs for a forest feel.
Usually an electric heater (Harvia, SAWO) sized to the room volume, with a control panel.
It depends on room size, wood, heater and décor. Send us the dimensions and we will quickly prepare an estimate.
Construction, finished saunas and the sauna atmosphere — in short videos.
12 October 2026 · 6 min read
Planning an apartment sauna? Room requirements, ventilation and power, protecting walls with insulation and a membrane, wood choice, and what sets the price.
10 October 2026 · 5 min read
How sauna ventilation works: inlet and outlet placement for electric and wood heaters, carbon monoxide, fire clearances, electrical safety, common mistakes.
4 October 2026 · 5 min read
A practical home sauna installation guide: choosing the room, ventilation, insulation and membrane to protect walls, heater wiring, wood, lighting and decor.
Free advice on size, model, wood and heater. Message us — we will discuss your project and give you an estimate.
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