Kalle XL Painted Black

Large-group sauna with black exterior

Prices from

£28,595 inc VAT
STEP 1 OF 1

Choose your sauna timber

Choose your timber colour

Natural

Walnut

Crimson

Obsidian

Mahogany

Arctic

Silver

Larch

Golden

Midnight

Olive

Cedar

Choose your roof shingles

Terracotta

Umber

Forest

Graphite

Onyx

Choose your sauna heater

Choose your add-ons

Product information

Big sauna, manageable build. Kalle XL covers 10.7m², the largest in the modular range, with pre assembled Spruce sections doing the heavy lifting before the structure ever reaches the garden. What would be a substantial panel by panel build instead becomes a straightforward fitting together process on site. Built for serious group wellness spaces without the extended construction timeline that scale usually demands. The Spruce structure is supplied with its exterior factory-finished in painted black.

Heat Treated Thermowood

Heat Treated Thermowood

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: 8-10 People
  • Footprint: 600 x 225 cm
  • Max Height: 250 cm
  • Floor Area: 10.7 m²
  • Wall Thickness: 180 mm
  • Material: Spruce
  • Main Door: 90 x 190 cm
  • Window 1: 230 x 148 cm
  • Window 2: 55 x 148 cm
  • Glazing: Tempered Glass
  • Assembly: Factory assembled
  • Insulated: Yes
  • Design Note: Only factory assembled and insulated; 7-degree roof pitch

Designed around your ritual

Full Moon Back Window

Full Moon Back Window

Bring the outdoors in. A full circular 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.
Building serious group sauna capacity without committing to a lengthy construction project matters most for households or small businesses who want the wellness benefits of sauna bathing available to more people, more often. The core physiological effects, improved circulation, reduced muscle tension, and a cardiovascular response comparable to light exercise, remain consistent regardless of sauna size, but the practical reality is that a sauna which actually gets built and operational quickly is one that starts delivering those benefits sooner.

For glamping operators and holiday lets, offering genuine group sauna capacity as part of a guest experience taps into well-documented social benefits of shared sauna use beyond the heat itself. Group sauna bathing, central to wellness culture across Finland and the Baltic states, supports both physical recovery and a more relaxed, connected social experience, something increasingly valued by guests seeking a genuine wellness amenity rather than a token feature.

The insulated, factory-built construction also means consistent, reliable heat retention even at this larger scale, which matters for group use since temperature stability can otherwise be affected by more frequent door opening and a larger volume of air to heat. A sauna built to handle eight to ten people reliably, without an extended build process standing between the decision to invest and actually being able to use it, removes much of the friction that might otherwise delay a household or business from establishing a genuine regular sauna practice.
Delivered as pre-assembled wall sections rather than individual panels, with free UK mainland delivery on qualifying orders. Even at 10.7m², the largest in the range, installation stays manageable since the heavy construction work is done before it reaches site. Needs a solid, level base and clear access for a larger structure. Professional installation is recommended; see our Self Assembly Guide.
At this scale, the modular Kalle XL benefits from a slightly more organised maintenance approach simply due to the larger surface area involved. After every session, leave the door open for twenty to thirty minutes to let the heat room dry out fully, preventing mould and staining regardless of the sauna's size. Wipe benches down once cooled, and sand the interior lightly once or twice a year wherever group use creates the most contact wear.

Windows need only a standard glass cleaner and soft cloth. Check door and window seals each season, and given the larger structure and 7-degree roof pitch, periodically inspect the roofline for any debris build-up that could affect water shedding, particularly after autumn leaf fall or stormy weather.

Externally, treat the spruce exterior with a wood treatment every two to three years, budgeting proportionally more time for this larger structure. Keep the full base perimeter clear of debris and standing water, checking drainage around the building's full footprint given its scale. For commercial installations seeing heavier or more frequent use, consider a more regular seasonal inspection schedule than a private household sauna would need.
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). Given this model's size and weight, additional pallet charges may apply and will be quoted separately based on your postcode, and forklift unloading may be required as it exceeds normal tail-lift limits (1000kg). 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 as pre-assembled wall sections rather than individual panels, with free UK mainland delivery on qualifying orders. Even at 10.7m², the largest in the range, installation stays manageable since the heavy construction work is done before it reaches site. Needs a solid, level base and clear access for a larger structure. Professional installation is recommended; see our Self Assembly Guide.
Cleaning & Care
At this scale, the modular Kalle XL benefits from a slightly more organised maintenance approach simply due to the larger surface area involved. After every session, leave the door open for twenty to thirty minutes to let the heat room dry out fully, preventing mould and staining regardless of the sauna's size. Wipe benches down once cooled, and sand the interior lightly once or twice a year wherever group use creates the most contact wear.

Windows need only a standard glass cleaner and soft cloth. Check door and window seals each season, and given the larger structure and 7-degree roof pitch, periodically inspect the roofline for any debris build-up that could affect water shedding, particularly after autumn leaf fall or stormy weather.

Externally, treat the spruce exterior with a wood treatment every two to three years, budgeting proportionally more time for this larger structure. Keep the full base perimeter clear of debris and standing water, checking drainage around the building's full footprint given its scale. For commercial installations seeing heavier or more frequent use, consider a more regular seasonal inspection schedule than a private household sauna would need.
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). Given this model's size and weight, additional pallet charges may apply and will be quoted separately based on your postcode, and forklift unloading may be required as it exceeds normal tail-lift limits (1000kg). 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.

Serious group capacity, built quickly

Modular Sauna Kalle XL is the largest in the Kalle line, with a 10.7 square metre footprint that puts it among the bigger structures in the entire range while retaining the pre assembled modular construction that defines the series throughout. Solid spruce wall sections are built and finished before reaching site, which keeps installation considerably more manageable than a structure of this size would otherwise involve if built panel by panel from scratch.

At this scale, the modular approach genuinely earns its place, since building a cabin of comparable size panel by panel would be a substantial undertaking for even an experienced self builder. Kalle XL instead arrives largely ready to assemble, with the heavy lifting of construction already done before it gets anywhere near the garden, leaving a more straightforward fitting together process on site rather than a full build from raw materials.

The result is a sauna capable of handling proper group use, with the practical advantages of modular construction scaling well as the size increases rather than becoming proportionally harder to manage. For anyone planning a serious outdoor wellness space who wants the size of a large multiroom build without the extended construction timeline that size usually implies, Kalle XL is built to bridge that exact gap. The Spruce structure is supplied with its exterior factory-finished in painted black.
Free Mainland UK Delivery Weather Resistant Thermowood Consistent Warmth Year Warranty Year-Round Use Heats Up Fast
Free Mainland UK Delivery Weather Resistant Thermowood Consistent Warmth Year Warranty Year-Round Use Heats Up Fast
Free Mainland UK Delivery Weather Resistant Thermowood Consistent Warmth Year Warranty Year-Round Use Heats Up Fast
Close

The largest modular sauna in the range

The largest modular sauna in the Kalle range, built for serious group capacity without a lengthy construction project. Fully insulated, factory-assembled sections sized comfortably for eight to ten people.

Group capacity without the long build

Strong group capacity with the speed advantage of modular construction intact. Kalle XL suits households or small businesses planning genuine regular sauna use at scale, without the extended build a log cabin equivalent would demand.

Insulated sections built for proper group use

Insulated wall sections and a 7-degree roof pitch built for proper group use. At 10.7 square metres, Kalle XL handles eight to ten people while still installing considerably faster than traditional log construction.

A real wellness amenity, built quickly

For glamping operators or large households wanting a real wellness amenity, Kalle XL delivers group capacity with manageable installation. Fully insulated, factory-built, and sized to handle serious regular use.

What our customers say

Don't just take our word for it

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Olivia

The Cascina

"The Nobile has a really premium feel. The frame colour looks sharp, the materials feel durable, and the finished veranda has a clean modern appearance."

Aluminium Veranda | The Nobile | Wide Span Up To 7m | Extra-Large Gutter | Polycarbonate or Glass Roof

James

Nobile

"The Cascina suits the house perfectly. What stood out most was the sturdy frame, neat roof finish and how well the design works with the garden."

Aluminium Veranda | The Cascina | Modular Interlinkable | Multiple Roof & Post Styles

Charlotte

The Cascina

"The Fiano Glass Doors feel smooth, sturdy and well finished. They keep the space bright and open while adding extra comfort when the weather turns cooler."

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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 HOME SAUNA

Frequently Asked Questions

It offers comparable floor area and group capacity to a large log sauna, but with a considerably faster, more predictable installation thanks to factory-assembled, fully insulated wall sections.

Comfortably eight to ten people, making it suitable for serious group sessions, regular entertaining, or small commercial use.

Yes, the combination of genuine group capacity and reliable factory construction makes it a strong option for glamping sites or holiday lets, though commercial use should always be checked against relevant regulations.

Yes, even at this size the wall sections arrive pre-assembled and insulated, keeping installation considerably faster than equivalent-sized traditional log construction.

A 7-degree roof pitch, designed to shed water effectively across the larger roof area this size of sauna requires.

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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