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Flat Pack Saunas & Sauna Kits

Our flat pack saunas arrive as pre-cut, numbered components that slot together without specialist tools, making a professional-grade outdoor sauna achievable in a weekend. Choose from thermowood outdoor cabins, indoor barrel saunas, and black cube models, with optional installation and HUUM heater upgrades.

What is a Flat Pack Sauna?

A flat pack sauna is delivered as pre-cut, numbered timber panels - typically kiln-dried thermowood or Nordic spruce with tongue-and-groove joinery - that fit together without specialist tools, so most confident DIYers can complete the build in one to two days. The panels arrive ready to assemble, with no cutting or complex carpentry required. An electrician will be needed to complete the final hardwired connection, but the structural build itself is well within reach for anyone comfortable with a self-assembly project.

Choosing Thermowood, Barrel, or Black Cube Styles

Our outdoor sauna range includes several designs to suit different garden layouts, aesthetics, and budgets.

Thermowood cabins feature straight walls and pitched roofs, making them a practical choice for placing against a fence, patio wall, or other garden boundary. The timber undergoes heat treatment that reduces its moisture content and improves its resistance to warping, decay, and rot, helping the cabin withstand outdoor conditions.

Barrel saunas have a distinctive curved design that allows rain and snow to run off rather than collect on the roof. The rounded interior also helps distribute heat throughout the sauna, so temperatures remain relatively consistent across the bench seating.

Black Cube saunas offer a more contemporary look, with a dark exterior, flat roof, and full-glass front. Their clean, architectural lines work particularly well in modern gardens where the sauna is intended to feel like a deliberate part of the outdoor space.

Adding a HUUM Heater to Your Kit

Most flat pack sauna kits are designed to accommodate popular heaters from our HUUM range. The right heater depends primarily on your sauna’s cubic metre volume, so check the recommended kW rating for your cabin before ordering. A qualified electrician should handle the final electrical connection and installation.

Heater choice also affects stone capacity and heat-up time, so matching the heater to your sauna’s size is an important part of the planning process. Once the panels and heater are installed, sauna accessories such as buckets, ladles, and backrests can add the finishing touches.

If you plan to include LED lighting or a WiFi controller, installing these at the same time can also make sense. With the wiring already accessible, your electrician can complete the additional connections as part of the same installation.

Frequently Asked Questions

Do I need any special tools to build a flat pack sauna kit?
Most kits need only a cordless drill, a rubber mallet, and a spirit level. The numbered panels and pre-drilled holes remove the need for cutting or specialist carpentry equipment.
Can one person assemble a flat pack sauna alone?
A single person can complete simpler panel sections, but the frame lifts and roof stages go faster with two people. Two people typically finish a compact cabin over a weekend.
Which HUUM heater fits a flat pack sauna kit?
Heater choice depends on your cabin’s cubic metre volume and stone load preference. Our HUUM range covers compact 2-person cabins through larger multi-person builds, so you match kW output to room size.
What is the difference between a barrel sauna and a black cube model?
Barrel saunas use a curved shell that sheds rain and circulates heat evenly around the bench. Black cube models offer a flat-roofed, glass-fronted design suited to modern garden settings.
Does a flat pack sauna kit include the wiring for the heater?
Kits include the heater bracket and cabling points, but a qualified electrician completes the final hardwired connection. This keeps the build compliant with UK wiring regulations.

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