Modular Sauna Kalle

Quick-build sauna with black exterior

Prices from

£10,095 inc VAT & Delivery Included
STEP 1 OF 1

Choose your installation

Choose your timber colour

Natural Spruce

Choose your roof shingles

Terracotta

Umber

Forest

Graphite

Onyx

Choose your sauna heater

Buy together
Modular Outdoor Sauna Kalle — 4–5 Person Painted Spruce Insulated Sauna, Factory-Built, 4.9m²
Modular Sauna LED Light Strips — Bench Lighting Kit, 1 Room

Choose your add-ons

Product information

All the heat retention, none of the long build. Modular Sauna Kalle uses pre assembled Spruce wall sections rather than panel by panel construction, fitting together quickly once it reaches the garden. 4.9m² of solid timber gives two or three people proper room without compromising on thermal performance. Built for anyone who wants a real outdoor sauna without committing several weekends to get there. The Spruce structure is supplied with its exterior factory-finished in painted black.

Natural Nordic Spruce

Natural Nordic Spruce

Built for Every Season

Built for Every Season

Everything You Need to Install

Everything You Need to Install

Designed for Fast Heat-Up

Designed for Fast Heat-Up

Specifications

  • Shape: Rectangular
  • Accommodates: 4-5 People
  • Footprint: 320 x 240 cm
  • Max Height: 250 cm
  • Floor Area: 4.9 m²
  • Wall Thickness: 180 mm
  • Material: Spruce
  • Main Door: 90 x 190 cm
  • Window: 230 x 148 cm
  • Glazing: Tempered Glass
  • Assembly: Factory assembled
  • Insulated: Yes
  • Design Note: Only factory assembled and insulated
  • Power Supply: Single or Three Phase
  • Heater Compatibility: Electric & Wood-Fired
Free Mainland UK Delivery Naturally Insulating Spruce Consistent Warmth Year Warranty Year-Round Use Heats Up Fast
Free Mainland UK Delivery Naturally Insulating Spruce Consistent Warmth Year Warranty Year-Round Use Heats Up Fast
Free Mainland UK Delivery Naturally Insulating Spruce Consistent Warmth Year Warranty Year-Round Use Heats Up Fast
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Designed around your ritual

Full Glass Back Window

Full Glass Back Window

Bring the outdoors in. A full glass rear window fills the sauna with natural light and opens up wider scenic views.
Half Moon Back Window

Half Moon Back Window

Privacy meets natural light. A half-moon rear window creates a softer, brighter feel while keeping more enclosed wall space.
Full Glass Front Barrel

Full Glass Front Barrel

Turn every session outward. Full front glazing opens the barrel sauna to natural light and uninterrupted outdoor views.
Full Glass Front Cube

Full Glass Front Cube

Modern design, open views. Full-height front glazing creates a brighter, cleaner space with a sharper architectural finish.
LED Lighting Kits

LED Lighting Kits

Set the perfect mood. Integrated LED lighting creates warmth and atmosphere, transforming the sauna experience day or night
Bluetooth Speakers

Bluetooth Speakers

Soundtrack your downtime. Built-in Bluetooth speakers bring music, podcasts, and guided sessions straight into your sauna.
Quality Accessories

Quality Accessories

Complete the experience properly. Practical finishing touches that improve comfort, convenience, and the overall sauna ritual.
Premium Thermowood

Premium Thermowood

Built to age beautifully. Thermowood offers a richer finish, stronger durability, and better long-term performance.

From Your Sketch
To Reality ✏️

A sauna built entirely around your space, your ideas and how you want it to feel.

Send us your hand-drawn sketches, and we’ll turn them into detailed CAD designs ready to bring your vision to life.

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Bespoke wood-fired sauna and wellness space
Modular construction doesn't change the physiological benefits of sauna bathing itself, but the insulated wall sections do typically mean faster warm-up times and more consistent heat retention than uninsulated log construction, which can make a real practical difference to how often a sauna actually gets used. A sauna that heats up quickly and holds its temperature reliably removes one more barrier to regular use, and consistency is what drives most of the long-term wellbeing benefits associated with sauna bathing.

The core benefits remain well established regardless of construction method: heat exposure raises heart rate and improves circulation in a way that resembles light cardiovascular exercise, and regular sauna bathers show improved long-term cardiovascular markers in studies of habitual users across Finland and similar sauna cultures. Sweating during a session also supports skin health by clearing pores and improving blood flow to the skin's surface.

For households new to sauna ownership specifically, a faster, more predictable build process can mean less delay between deciding to invest in a sauna and actually being able to use it regularly. Given that habit formation around wellness practices tends to benefit from early, consistent use, getting a sauna installed and operational quickly, rather than facing weeks of self-assembly, can genuinely support building a lasting routine rather than losing momentum during a long build process.
Delivered flat-packed for self-assembly, with free UK mainland delivery on qualifying orders. The larger Cube format requires a little more assembly time than the smaller Icon models, so we recommend allowing a weekend and having a second person to help. A solid, level base and suitable delivery access are required.

For a complete setup, select Professional Installation and choose your preferred date, allowing for the stated production lead time. We’ll then arrange the installation around your requirements, including any additional preparation or works needed to accommodate your sauna where possible.

Electric sauna heaters require a suitable dedicated electrical supply and are not simply plug-and-play. The power requirements depend on the heater's output and the electrical supply available at the property.

Smaller heaters may be suitable for a 230V single-phase supply, while larger or more powerful heaters can require a 400V three-phase supply. Single-phase power uses one electrical phase, whereas three-phase power distributes the load across three phases and is better suited to higher-powered equipment.

The correct supply will depend on the specific heater you choose, so the heater's electrical requirements should always be checked before installation.

Sauna heaters will normally need to be hard-wired into a correctly rated dedicated circuit with the appropriate cable, isolation and electrical protection. They should not be connected using a standard household plug or extension lead.

The final electrical connection should be completed by a suitably qualified electrician in accordance with the heater manufacturer's instructions and applicable electrical regulations. This is important for both safety and reliable operation of the heater.

If you're based in the Leicestershire area, we can arrange the electrical installation of your sauna heater for an additional fee. Please speak to our team if you'd like this included with your sauna.

Wood-fired sauna heaters do not require an electrical supply for heating, but they do require the correct installation of the stove, chimney, flue and surrounding heat protection.

The stove must be positioned according to the manufacturer's required safety distances from timber walls, benches and other combustible materials. Depending on the stove and sauna design, suitable heat shields or other non-combustible protection may also be required.

The floor beneath and immediately around the stove may also require suitable non-combustible protection, particularly where there is a risk of embers or hot material falling from the stove.

A suitable chimney and flue system must be installed to safely carry smoke and combustion gases outside the sauna. Where the flue passes through the roof, the correct insulated chimney components, roof flashing and heat-resistant protection should be used.

Correct ventilation is also important. A wood-fired stove requires an adequate supply of combustion air, while the sauna itself needs sufficient airflow to provide fresh air, circulate heat and allow moisture to escape.

When choosing the position of an outdoor wood-fired sauna, you should also consider where the chimney will discharge in relation to your house, neighbouring properties, windows, boundaries and outdoor seating areas.

Any applicable local requirements should be checked before installation, particularly where chimney positioning, smoke control or other restrictions may apply.

Modular saunas need broadly the same care as traditional log construction, with the added benefit of factory insulation reducing some of the moisture-related risks that uninsulated cabins face. After every session, leave the door open for twenty to thirty minutes to let the heat room dry out fully, which remains the most effective way to prevent mould or staining regardless of construction method. Wipe benches down once cooled, and give the interior a light sand once or twice a year wherever hands and bare skin make the most contact.

The tempered glass window just needs a standard glass cleaner and soft cloth. Because the wall sections are factory-built and insulated, there's less need to worry about gaps or settling at the joints compared with a self-assembled log structure, though it's still worth checking seals around the door and window each season.

Externally, treat the spruce exterior with a wood treatment every two to three years depending on weather exposure, following the same principles as any outdoor timber building. Keep the base of the structure clear of leaves and standing water, and check that any ground preparation done at installation is still draining properly, since this affects insulated modular construction the same way it affects traditional log saunas.
This sauna comes with a 5 year warranty for residential use and 2 years for commercial use, covering structural timber, glazing, and hardware. Valid claims are assessed case by case, and we'll supply replacement parts wherever possible rather than the whole sauna.
Production takes 10-12 weeks, plus 1-2 weeks dispatch time for pallet haulage. This sauna is delivered as pre-assembled wall sections rather than fully flat packed. Free UK mainland shipping applies to orders over £500 covering up to one double pallet (2.4m x 1.2m x 2.2m) or two single pallets (1.2m x 1.2m x 2.2m). If your order exceeds this due to length, weight, or quantity, additional pallet charges may apply and are quoted separately based on postcode. Please have a solid base, clear access, and suitable unloading space ready before delivery, with help on site if needed. Pallet deliveries are kerbside only, and you're responsible for moving goods onto your property.
Health Benefits
Assembly & Installation
Delivered flat-packed for self-assembly, with free UK mainland delivery on qualifying orders. The larger Cube format requires a little more assembly time than the smaller Icon models, so we recommend allowing a weekend and having a second person to help. A solid, level base and suitable delivery access are required.

For a complete setup, select Professional Installation and choose your preferred date, allowing for the stated production lead time. We’ll then arrange the installation around your requirements, including any additional preparation or works needed to accommodate your sauna where possible.
Electric Heater Setup

Electric sauna heaters require a suitable dedicated electrical supply and are not simply plug-and-play. The power requirements depend on the heater's output and the electrical supply available at the property.

Smaller heaters may be suitable for a 230V single-phase supply, while larger or more powerful heaters can require a 400V three-phase supply. Single-phase power uses one electrical phase, whereas three-phase power distributes the load across three phases and is better suited to higher-powered equipment.

The correct supply will depend on the specific heater you choose, so the heater's electrical requirements should always be checked before installation.

Sauna heaters will normally need to be hard-wired into a correctly rated dedicated circuit with the appropriate cable, isolation and electrical protection. They should not be connected using a standard household plug or extension lead.

The final electrical connection should be completed by a suitably qualified electrician in accordance with the heater manufacturer's instructions and applicable electrical regulations. This is important for both safety and reliable operation of the heater.

If you're based in the Leicestershire area, we can arrange the electrical installation of your sauna heater for an additional fee. Please speak to our team if you'd like this included with your sauna.

Wood-Fired Heater Setup

Wood-fired sauna heaters do not require an electrical supply for heating, but they do require the correct installation of the stove, chimney, flue and surrounding heat protection.

The stove must be positioned according to the manufacturer's required safety distances from timber walls, benches and other combustible materials. Depending on the stove and sauna design, suitable heat shields or other non-combustible protection may also be required.

The floor beneath and immediately around the stove may also require suitable non-combustible protection, particularly where there is a risk of embers or hot material falling from the stove.

A suitable chimney and flue system must be installed to safely carry smoke and combustion gases outside the sauna. Where the flue passes through the roof, the correct insulated chimney components, roof flashing and heat-resistant protection should be used.

Correct ventilation is also important. A wood-fired stove requires an adequate supply of combustion air, while the sauna itself needs sufficient airflow to provide fresh air, circulate heat and allow moisture to escape.

When choosing the position of an outdoor wood-fired sauna, you should also consider where the chimney will discharge in relation to your house, neighbouring properties, windows, boundaries and outdoor seating areas.

Any applicable local requirements should be checked before installation, particularly where chimney positioning, smoke control or other restrictions may apply.

Cleaning & Care
Modular saunas need broadly the same care as traditional log construction, with the added benefit of factory insulation reducing some of the moisture-related risks that uninsulated cabins face. After every session, leave the door open for twenty to thirty minutes to let the heat room dry out fully, which remains the most effective way to prevent mould or staining regardless of construction method. Wipe benches down once cooled, and give the interior a light sand once or twice a year wherever hands and bare skin make the most contact.

The tempered glass window just needs a standard glass cleaner and soft cloth. Because the wall sections are factory-built and insulated, there's less need to worry about gaps or settling at the joints compared with a self-assembled log structure, though it's still worth checking seals around the door and window each season.

Externally, treat the spruce exterior with a wood treatment every two to three years depending on weather exposure, following the same principles as any outdoor timber building. Keep the base of the structure clear of leaves and standing water, and check that any ground preparation done at installation is still draining properly, since this affects insulated modular construction the same way it affects traditional log saunas.
Warranty
This sauna comes with a 5 year warranty for residential use and 2 years for commercial use, covering structural timber, glazing, and hardware. Valid claims are assessed case by case, and we'll supply replacement parts wherever possible rather than the whole sauna.
Delivery
Production takes 10-12 weeks, plus 1-2 weeks dispatch time for pallet haulage. This sauna is delivered as pre-assembled wall sections rather than fully flat packed. Free UK mainland shipping applies to orders over £500 covering up to one double pallet (2.4m x 1.2m x 2.2m) or two single pallets (1.2m x 1.2m x 2.2m). If your order exceeds this due to length, weight, or quantity, additional pallet charges may apply and are quoted separately based on postcode. Please have a solid base, clear access, and suitable unloading space ready before delivery, with help on site if needed. Pallet deliveries are kerbside only, and you're responsible for moving goods onto your property.
Modular Outdoor Sauna Kalle — Painted Black Spruce Cabin, 4.9m² — lifestyle photo 1

A faster build without the compromise

Modular Sauna Kalle is built using pre assembled wall sections rather than the panel by panel log construction used elsewhere in the range, which means a faster, more predictable installation process once it arrives in the garden. At 4.9 square metres, it gives two or three people proper room to sit, with solid spruce construction throughout so the modular approach does not come at the cost of thermal performance, holding heat just as effectively as a traditionally built equivalent of the same size.

Each modular section is built and finished before it reaches site, so assembly is largely a case of fitting the sections together rather than building the structure piece by piece from individual logs. This makes Kalle a sensible choice for anyone who wants the benefits of a quality outdoor sauna without an extended self build project, while still getting solid timber walls rather than a thinner panel system that would compromise heat retention and long term durability against UK weather.

Kalle suits gardens where a straightforward installation matters as much as the finished sauna itself, whether that is due to time, the practicalities of access, or simply a preference for getting up and running with minimal fuss rather than committing several weekends to a build. It remains a genuine outdoor sauna in every respect that matters, with real thermal mass and proper construction, just with an easier and more predictable path to first use than the log built alternatives. The Spruce structure is supplied with its exterior factory-finished in painted black.
Modular Outdoor Sauna Kalle — Painted Black Spruce Cabin, 4.9m² — painted — lifestyle
Modular Outdoor Sauna Kalle — Painted Black Spruce Cabin, 4.9m² — lifestyle photo 2
Modular Outdoor Sauna Kalle — 4–5 Person Painted Spruce Insulated Sauna, Factory-Built, 4.9m²
Modular Outdoor Sauna Kalle — Painted Black Spruce Cabin, 4.9m² — painted — lifestyle
Modular Outdoor Sauna Kalle — Painted Black Spruce Cabin, 4.9m² — painted — angle view 1
Modular Outdoor Sauna Kalle — Painted Black Spruce Cabin, 4.9m² — painted — lifestyle
Modular Outdoor Sauna Kalle — Painted Black Spruce Cabin, 4.9m² — painted — lifestyle
Modular Outdoor Sauna Kalle — 4–5 Person Painted Spruce Insulated Sauna, Factory-Built, 4.9m²
Modular Outdoor Sauna Kalle — 4–5 Person Painted Spruce Insulated Sauna, Factory-Built, 4.9m²

From delivery to first sauna, fast

Kalle arrives as pre-assembled spruce sections that fit together in days, not weekends — the shortcut to a real outdoor sauna.

Painted black, sharply modern

The factory-painted black exterior gives a crisp, architectural presence that flatters planting and modern homes alike.

Proper timber, proper heat

Solid spruce walls give 4.9m² of genuine thermal performance for two to three people — modular never means flimsy here.

Ready before winter arrives

Chosen by households who decided in October and were sweating by November — speed without compromise.

Build your modular sauna

1

Choose the sauna size, layout and feel that suits your garden and routine.

2

Place your order and we confirm the key details before preparing your sauna.

3

Get ready for delivery, installation and proper heat sessions at home.

BUILD MY WELLNESS SPACE

Frequently Asked Questions

Modular saunas arrive as pre-assembled wall sections built and insulated at the factory, while traditional log saunas are built panel by panel on site, making modular construction considerably faster to install.

Yes, factory insulation in the wall sections means modular saunas typically retain heat at least as well as traditional log construction, often better given the controlled manufacturing process.

Installation is significantly faster than a self-build log sauna since the wall sections arrive pre-assembled; exact timing depends on site preparation and access, but the structure itself goes together quickly.

Insulated sections are specifically engineered to retain heat efficiently, which can mean lower running costs and faster warm-up times compared with solid, uninsulated log construction of a similar thickness.

This model comfortably seats four to five people, suiting small households or regular small group use.

5-Year Guarantee

5-Year Guarantee

Built for years of wellness and relaxation

Free UK Mainland Delivery

Free UK Mainland Delivery

Free delivery throughout England, Wales, and Scotland.

Expert Help, When You Need It

Expert Help, When You Need It

Friendly specialist support before and after your purchase. Schedule a virtual appointment.

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