Anyone looking to buy an outdoor sauna is quickly faced with important questions:
Which size is suitable? Which sauna shape fits the garden best? And what really matters when choosing an outdoor sauna?
An outdoor sauna is a long-term investment. Size, design, wood type and technical equipment should not only look appealing, but also match the intended use, the available space and long-term expectations. Poor purchase decisions usually occur when these factors are not considered carefully enough.
This guide helps you evaluate the most important criteria in a structured way. On this basis, an individually tailored solution can be defined that truly fits your requirements, available space and how the sauna will be used.
What Should You Consider When Buying an Outdoor Sauna?
Choosing the right outdoor sauna is not about a single feature. It is about how usage, size, design, materials and technology work together.
A structured approach helps avoid common mistakes and makes the decision process much clearer.
Choosing the Right Outdoor Sauna: Usage and Requirements
The first step is to realistically assess how the sauna will be used.
Typical usage scenarios include:
- regular use by one or two people
- shared use with family or friends
- occasional use at a holiday or weekend home
- year-round use with higher frequency
The more intensively the sauna is used, the more important the following aspects become:
- sufficient interior space
- solid construction
- reliable heating technology
- manageable maintenance requirements
In practice, many outdoor saunas are chosen too small because the focus is placed mainly on price or limited garden space.
What Size Should an Outdoor Sauna Be?
The size of an outdoor sauna directly affects comfort, energy consumption and long-term satisfaction.
As a general guideline:
- Outdoor sauna for 1–2 people: approx. 2.0–2.4 m length
- Outdoor sauna for 3–4 people: approx. 2.4–2.8 m
- Outdoor sauna for 5–6 people: from approx. 3.0 m
It is important to consider not only the number of users, but also:
- seating and reclining options
- freedom of movement inside the sauna
- door position and interior layout
Barrel Sauna, Igloo or Rectangular Sauna – Which Design Is Right?
Barrel Sauna
Barrel saunas are among the most popular outdoor sauna designs.
Advantages:
- very good air circulation
- short heat-up times
- compact footprint
Limitation:
- limited standing height
Igloo or Oval Sauna
Igloo and oval saunas offer more headroom and a more open interior feel.
Advantages:
- higher comfort level
- better use of vertical space
- modern appearance
Cube Sauna
Rectangular saunas provide maximum flexibility inside.
Advantages:
- efficient use of interior space
- flexible bench and heater placement
- suitable for larger groups
Which Wood Type Is Suitable for an Outdoor Sauna?
The choice of wood has a significant impact on durability, maintenance effort and appearance.
Thermowood
- high dimensional stability
- low moisture absorption
- reduced maintenance requirements
Spruce
- natural look and feel
- lower purchase price
- regular exterior maintenance required
Regardless of wood type:
- interior wood should not be sealed or treated
- exterior wood must be suited to local climate conditions
Location and Foundation for Outdoor Saunas
An outdoor sauna requires:
- a level, load-bearing base
- proper drainage
- sufficient ventilation
- adequate distance from buildings and trees
Suitable foundations include:
- concrete slabs
- point or screw foundations
- stable timber platforms
An unsuitable base can lead to moisture problems and increased maintenance over time.
Choosing a Sauna Heater: Electric or Wood-Fired?
Electric Sauna Heater
- easy operation
- consistent temperature control
- low maintenance
- requires a suitable power supply
Wood-Burning Sauna Heater
- traditional sauna experience
- independent from electricity
- higher maintenance effort
- local regulations may apply
The heater output must always match the sauna size. Incorrect sizing will result in long heat-up times and reduced comfort. See our guide.
How Much Maintenance Does an Outdoor Sauna Really Need?
Outdoor saunas are not maintenance-free, but the effort required is manageable and predictable.
Key points include:
- proper ventilation after use
- exterior wood care
- regular checks of heater and sauna stones
- protection from prolonged moisture exposure
The quality of materials and construction largely determines how much maintenance is actually required.
Common Mistakes When Buying an Outdoor Sauna
- choosing a sauna that is too small
- incorrect heater output
- underestimating maintenance requirements
- insufficient preparation of the installation site
- prioritising appearance over function
These mistakes can be avoided with a structured decision-making process.
Conclusion: Finding the Right Outdoor Sauna
The right outdoor sauna is not defined by a single feature, but by the combination of usage, size, design, materials, technology and location.
On this basis, an individually tailored solution can be selected that truly fits your requirements, available space and intended use.
Personal Consultation for Choosing Your Outdoor Sauna
Every garden and usage scenario is different. If you are unsure which outdoor sauna size, design or configuration is best suited to your needs, we are happy to support you with personal advice.
You can book a non-binding consultation via our consultation calendar to discuss your requirements and identify the most suitable solution.
