Thermo Wood Barrel Sauna - Large (6 - 8 Person) Barrel Sauna | Finnmark Sauna

Crafted for Connection – 6 Person Barrel Sauna by Finnmark

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Nordic Thermo-Spruce: Timeless Durability 

Every 6 person outdoor barrel sauna in our range is crafted from Nordic thermo-spruce – timber transformed through heat and steam into something extraordinary. This natural process enhances stability, reduces absorption, and strengthens resistance to the elements.

Unlike untreated wood, it will not warp, swell, or twist with the seasons, giving you a structure that feels as dependable in the depths of winter as it does on a summer evening. Its enhanced stability and reduced moisture absorption ensure a durable, long-lasting sauna that performs beautifully in the ever-changing British climate. Responsibly sourced and refined by world-leading Nordic specialists, every board unites durability with rich natural character – the foundation of a lasting private wellness retreat.

The Art of Heat, Light, and Nordic Tradition

Creating the perfect outdoor sauna experience starts with having a choice. In our six-person range, you can select between the authentic crackle of a wood-burning stove or the convenience of an electric heater. Both are sourced from world-leading Nordic makers such as Narvi and HUUM – each known for blending design excellence with performance that endures.

Ambience is just as essential as heat. Panoramic windows open the space to your surroundings, while sauna lighting sets the mood – whether that’s a soft glow from LED strips, or warm wall fittings.

To complete the ritual, Finnmark curates a collection of sauna accessories: hand-crafted buckets and ladles,, pillows & seat covers, and more. Every element works together to transform your 6 person barrel sauna into a true home spa – a place where therapeutic heat and thoughtful details create an atmosphere of lasting wellness.

Thermo Wood Barrel Sauna - Regular with Relaxation Terrace (2 - 4 Person) Barrel Sauna | Finnmark Sauna
Thermo Wood Barrel Sauna - Small with Relaxation Terrace (2 - 4 Person) Barrel Sauna | Finnmark Sauna
Thermo Wood Barrel Sauna - Large (6 - 8 Person) Barrel Sauna | Finnmark Sauna
Thermo Wood Barrel Sauna - Regular with Relaxation Terrace (2 - 4 Person) Barrel Sauna | Finnmark Sauna

From Flat-Pack to Function in a Day

Even at a six-person scale, your sauna is designed to arrive with effortless simplicity. Each 6 person barrel sauna is delivered flat-packed, making transport and placement straightforward, even where outdoor access is limited. Precision-engineered panels and components align seamlessly, so assembly feels natural and the finished structure stands as though it has always belonged in your garden.

For those seeking a completely turn-key experience, Finnmark can provide professional installation. Our specialist team will assemble your sauna with the same meticulous care found in its Nordic design, ensuring everything is ready for years of reliable use. Whether you build it yourself or let us take care of every detail, the result is a wellness retreat crafted to enrich daily life from the very first gentle rise of steam.

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Frequently Asked Questions

How energy efficient is a 6 person outdoor barrel sauna?

Despite its size, the curved barrel shape promotes efficient heat circulation. Combined with thermo-spruce’s insulating qualities and premium heaters, the 6 person outdoor barrel sauna performs as an energy-efficient sauna, maintaining therapeutic heat while minimising running costs.

How long does it take to heat a 6 person barrel sauna?

The time it takes to heat a 6-person barrel sauna varies depending on the heater you select, along with external factors such as placement and season. In warmer conditions it may be ready in under an hour, whereas colder weather can extend the process. Electric heaters deliver convenience and ease of use, while wood-burning stoves take more time but provide the timeless Finnish atmosphere of a crackling fire and natural wood aroma.

What kind of base or foundation is needed for a large outdoor sauna?

A flat, level, and stable surface is essential. Most customers use a concrete pad, paving stones, or decking. A solid foundation ensures proper drainage and keeps the structure stable for years to come.

How do I maintain a 6 person outdoor barrel sauna?

One of the advantages of thermo-spruce is that it requires very little upkeep, but a few simple steps will help your sauna stay beautiful for years. On the exterior, applying a breathable stain or protective oil once a year helps shield the wood from harsh weather, especially in coastal or exposed locations.

Inside, treating benches and panelling with sauna paraffin oil every 6–12 months creates a protective barrier that helps prevent water damage, staining, and bacterial growth, while enhancing the wood’s natural grain and preserving its refined appearance over time. Combined with regular cleaning and good ventilation after each session, these measures ensure your sauna remains in top condition season after season.

For more information, read our full sauna cleaning guide.

Can a 6 person barrel sauna be used for commercial or holiday rentals?

Yes. Their scale, durability, and low-maintenance timber make these saunas popular with boutique holiday lets and Airbnbs. It offers a premium feature that enhances guest experience while standing up to regular use.

We would love to hear from you.

If you'd like to talk about your sauna plans, or simply want some free help and advice, send us a message below or call us on+44 (0)20 8050 2895