Sauna Interior Design: What Really Matters for Comfort and Safety

Sauna Stool Styles

Whether it’s the common double-sided arrangement, the practical opposite-door design, or the L-shaped structure, choosing the right layout based on the size and intended use of your sauna room is a crucial part of smart sauna interior design — helping you create an ideal environment that’s both practical and relaxing.

Single-Layer Stools on Both Sides

This layout is the most common home style. Stools are symmetrically placed along the left and right sides of the sauna room. They are typically single-layered, maximizing airflow and creating a clean, symmetrical feel. They also facilitate entry and exit and promote even heat flow.

Double-Layer Stools on Both Sides

Double-layer stools are placed on either side of the sauna wall. The upper layer is typically used for deep sweating, while the lower layer is suitable for those who struggle with high temperatures and can also serve as a footrest. Compared to a single-layer arrangement, this design not only improves space efficiency, but the double-layer structure also allows for more differentiated heat distribution, providing a variety of temperature options.

Single-Layer Stools on Opposite Doors

When the sauna room is small or inaccessible, the most practical solution is to cluster the stools on the side opposite the door. This layout saves space, making it suitable for a single person. It also allows for the placement of a sauna heater near the door, creating a more spacious feel.

L-Shaped Stools

Arranging stools in an L-shape along two walls creates a significantly enhanced atmosphere, making it ideal for shared use by family or friends. This layout not only effectively increases seating capacity but also lends itself well to the addition of backrests and light strips, creating an immersive experience.

What are the requirements for the height and level design of sauna stools?

The size design of sauna stools is not only about aesthetics, but also about achieving the perfect balance of functionality and comfort. As a key element of thoughtful sauna interior design, a reasonable height allows users to sit and recline with ease, while the temperature difference between upper and lower layers creates varying thermal experiences. Additionally, the appropriate stool width ensures comfort in both sitting and lying positions. Whether it’s a single-layer or double-layer structure, stool design plays an essential role in enhancing the overall sauna experience.

Single-Layer Stools

Most family sauna stools are usually designed as a single row against the wall, with a recommended height of about 45 cm. This height is close to the height of the human body’s natural sitting posture, making sitting down and standing up effortless, and it is closer to the ground, the temperature is lower, and it can be used with a backrest to improve the comfort of the sauna.

Double-layer stools

The recommended height of the upper stool is about 40 cm, which is convenient for getting up and down and conforms to the natural sitting posture. The closer to the ceiling, the higher the temperature. The upper stool is designed at this height to place the user’s body, especially the head and upper body, in the area where heat is most concentrated, thereby achieving the best perspiration effect.

Stool Width and Aisle Distance

The width design of the stool directly affects both the comfort level of the sauna and the overall spatial layout — making it a key aspect of sauna interior design. The following takes Alphasauna’s 2-meter and 1.8-meter round saunas, as well as a 2-meter square sauna, as examples.

Stool Width of a 2-Meter Round Sauna

Indoor stools usually adopt a bilateral design with left-right symmetry to maximize the use of limited space. The width of the stool is designed to be about 50 cm, which can not only meet the leg support of normal sitting posture, but also provide appropriate backrest space to ensure stable and unrestrained sitting posture.
In addition, this width also supports a more relaxed semi-lying posture. The width of the middle passage is about 70 cm. In order to make the aisle more flat and comfortable, a wooden mat about 60 cm wide is laid on the ground, which not only improves the foot feel, but also maintains overall ventilation and safety.

Stool Width of a 1.8-Meter Round Sauna

Usually, a symmetrical bilateral stool arrangement is adopted. In this relatively compact space, the stool width is designed to be 40 cm. This size ensures basic sitting comfort while retaining sufficient aisle space. The aisle width is also about 70 cm, and the floor is paved with a wooden mat about 60 cm wide.
Compared with the 2-meter-wide round sauna, the 40-cm stool surface is more suitable for compact round saunas, emphasizing space saving and functional balance; while the 50-cm stool surface is more inclined to comfort and multifunctional sitting and lying experience.

Minimum required dimensions and width for double-decker seats

The recommended minimum height for double-layered seats in a sauna is 1.8 meters or higher. This ensures approximately 90 cm of headroom when sitting on the upper layer, ensuring a comfortable experience. Double-layered seats are typically 35–45 cm wide on the lower layer, primarily used as a footrest or auxiliary seat, while the upper layer is 45–55 cm wide, serving as the primary sitting or sleeping area and requiring greater comfort. Overall, the upper layer is approximately 5–10 cm wider than the lower layer, ensuring both comfort and ease of movement.

Do you recommend a double-layer stool or a single-layer stool?

If the sauna room is over 1.8 meters tall, a double-layered stool is recommended. This provides ample seating space on the upper level, allowing for better utilization of the room’s space and allowing for the experience of varying temperatures, more similar to a traditional Finnish sauna.

For a typical 1.8-meter room, while a double-layered stool is theoretically possible, the upper level space is limited. Overall, a single-layered stool is recommended for this height, offering a spacious and comfortable seating position.

Stool Width and Aisle Distance

The width design of the stool directly affects both the comfort level of the sauna and the overall spatial layout — making it a key aspect of sauna interior design. The following takes Alphasauna’s 2-meter and 1.8-meter round saunas, as well as a 2-meter square sauna, as examples.

Stool Width of a 2-Meter Round Sauna

Indoor stools usually adopt a bilateral design with left-right symmetry to maximize the use of limited space. The width of the stool is designed to be about 50 cm, which can not only meet the leg support of normal sitting posture, but also provide appropriate backrest space to ensure stable and unrestrained sitting posture.
In addition, this width also supports a more relaxed semi-lying posture. The width of the middle passage is about 70 cm. In order to make the aisle more flat and comfortable, a wooden mat about 60 cm wide is laid on the ground, which not only improves the foot feel, but also maintains overall ventilation and safety.

Stool Width of a 1.8-Meter Round Sauna

Usually, a symmetrical bilateral stool arrangement is adopted. In this relatively compact space, the stool width is designed to be 40 cm. This size ensures basic sitting comfort while retaining sufficient aisle space. The aisle width is also about 70 cm, and the floor is paved with a wooden mat about 60 cm wide.
Compared with the 2-meter-wide round sauna, the 40-cm stool surface is more suitable for compact round saunas, emphasizing space saving and functional balance; while the 50-cm stool surface is more inclined to comfort and multifunctional sitting and lying experience.

Backrest design

The backrest design in a sauna room is a bonus for enhancing user comfort and visual quality. Although not all sauna rooms come with a backrest as standard, customized backrests are still a very popular choice for those seeking a more relaxing experience or a more aesthetically pleasing space. A well-designed backrest should take into account the following aspects:

Backrest Style

Among many customized options, the horizontal strip backrest stands out for its commonness and practicality. This design is usually composed of 2 to 4 wooden strips, with a thickness of about 1.5 to 2 cm and a width of 6 to 8 cm. The spacing between the strips is maintained at 1 to 2 cm. This design not only helps air circulation, but also effectively disperses heat.
In order to further enhance the texture of the details, the wooden strips are usually rounded and chamfered to improve the comfort of the skin. In addition, some users will choose to embed hidden light strips behind the backrest, which emit soft light through the gaps between the wooden strips, creating a warm and elegant indirect lighting effect and enhancing the overall atmosphere.

Material Selection

It is recommended to use heat-resistant wood that is coordinated with the wall panels or seats, such as hemlock, red cedar, pine or heat-treated wood. The wood surface should be smooth and thorn-free. After polishing and treatment, it is not only comfortable to touch, but also has good moisture resistance and high temperature resistance, suitable for high temperature and humid environment.
Installation position
The backrest is usually installed on the wall behind the upper seat. It is recommended that the lower edge be kept 10-15 cm from the seat surface, and the upper edge height is recommended to be 35-40 cm. This design can not only effectively support the back, but also help relieve the discomfort caused by long-term sitting.

Installation Position

The backrest is usually installed on the wall behind the upper seat. It is recommended that the lower edge be kept 10-15 cm from the seat surface, and the upper edge height is recommended to be 35-40 cm. This design can not only effectively support the back, but also help relieve the discomfort caused by long-term sitting.

Sauna Door

A sauna room door not only provides basic entry and exit functions but is also an essential component of the overall safety design. From the requirement that the door must open outward and not contain lockable structures to the requirement that the door body be made of tempered glass, every specification stems from a thorough consideration of user safety in high-temperature environments.

Tempered Glass Doors

They offer a clear view, allowing for visibility inside and outside, enhancing safety, while also being heat-resistant and deformation-resistant, making them a common choice for sauna rooms.

Wooden Frame with Tempered Glass

Combining the thermal insulation properties of wood with the elegant appearance of glass, they offer both heat resistance and a harmonious overall style.

Wooden Sauna Doors

Wooden sauna doors are a classic choice. Common woods include cedar and hemlock, both of which have natural grain, a subtle fragrance, and a warm and pleasant feel.

FAQ

Frequently asked questions are as follows：

How Should the Size and Position of Windows Be Selected?

The window size should be moderate to ensure ventilation and lighting while avoiding heat loss. It should be located on a wall that is easy to ventilate.

Where Is the Best Place to Install the Sauna Stove?

The sauna stove should be installed in a corner of the sauna room, away from doors, windows and seats, to ensure safe ventilation and facilitate even heat distribution.

Where Should the Vents Be Opened Most Effectively?

The vents should be opened at low and high places in the sauna room to form air convection, ensure fresh air in and hot air out, and achieve the best effect.

What Details Should Be Paid Attention to When Choosing Materials for the Interior of the Sauna Room?

The interior of the sauna room should use wood that is resistant to high temperatures, not easy to crack, resin-free and odor-free, such as red cedar, pine or heat-treated wood, to ensure safety, comfort and durability.

Are There Any Special Requests We Can Customize?

Yes, Alphasauna offers a diverse product range and is flexible enough to accommodate your customization needs, including OEM and ODM services. If you’re interested, please contact us for more information. You can also visit the Alphasauna blog and our website for more articles like this one, which will answer most of your product questions.

How high can I make an L-shaped double-layer stool?

If the height of the sauna room is over 1.8 meters, it is recommended to design an L-shaped double-layer stool. This height can ensure that there is enough head space when sitting on the upper layer, providing a comfortable experience. At the same time, the corner layout can make the space more reasonable.