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Sauna projects are among the most challenging environments for construction materials due to extreme heat, high humidity, intense steam, and constant hot–cold transitions. Therefore, the wood used in saunas must be durable, stable, and safe for user health. Thanks to the thermal modification process, Thermowood has become an indispensable material for sauna projects as a natural, long-lasting, and aesthetically appealing solution that meets all these requirements.
Through a special thermal modification process applied at 180–215°C, Thermowood gains natural resistance against the extreme conditions found in sauna environments. With both its interior aesthetics and technical performance, it is one of the most recommended materials for sauna design.
Thermowood maintains its form under high heat.
Since it contains no resin, there is no leaking, melting, or odor under heat.
Stabilized fiber structure reduces cracking and deformation.
Provides a comfortable experience even under sauna conditions above 100°C.
For this reason, Thermowood offers reliable and long-lasting performance in sauna interiors.
The thermal modification process, the foundation of Thermowood production, is the most critical stage that maximizes wood durability against sauna environments.
During thermal modification, resins evaporate and are removed from the wood.
Moisture content is reduced to 4–6%.
A resin-free structure prevents stickiness and unpleasant odor even at high temperatures.
These features ensure safe and comfortable use, especially in sauna seating areas.
With the breakdown of hemicelluloses in the cell walls, hygroscopic behavior is minimized.
The wood becomes more stable and reacts less to moisture changes.
Deformation caused by hot–cold cycles is significantly reduced.
This provides long-term stability across all sauna surfaces.
Traditional wood cannot show sufficient resistance to the sharp temperature and humidity changes in saunas. Thermowood, however, is a natural material specially enhanced for such environments.
Moisture absorption release rate is low.
Material does not “work” or move under intense steam cycles.
No loss of form in seating surfaces or ceiling claddings.
For this reason, Thermowood claddings offer a safer structure in sauna applications.
After thermal modification, the wood becomes more rigid yet controllably flexible.
Sudden temperature changes cause minimal unexpected cracking.
Surface smoothness and structural integrity are preserved for many years.
Thermowood creates a modern and natural atmosphere in sauna designs, not just through its technical performance but also through its aesthetic integrity.
After thermal modification, wood gains a homogeneous and warm tone.
The natural texture harmonizes with modern and minimalist sauna architecture.
Supports the premium appearance sought in luxury hotels and wellness centers.
Seamless, homogeneous appearance on large surface claddings
Warm color transitions that interact beautifully with lighting
Natural texture pairing well with materials like stone, glass, and metal
A sustainable luxury approach in modern wellness concepts
Thermowood is one of the key aesthetic components in spa and wellness architecture.
The material used in saunas must be fully safe for user health. Thermowood fulfills this requirement with its natural composition and eco-friendly production process.
No chemicals are used in Thermowood production.
Wood is treated only with steam and controlled heat.
Eliminates the risk of chemical emissions.
This makes Thermowood one of the safest sauna materials in terms of health.
Removal of resin and volatile compounds prevents harmful gas release when heated.
Maintains air quality in enclosed, hot environments like saunas.
Creates no risk for users in terms of skin or respiratory health.
Maintenance of Thermowood sauna surfaces is quite easy. With regular cleaning and proper protection methods, it preserves its performance for many years.
After sauna use, the surface can be wiped with a dry cloth.
When needed, the surface can be refreshed with light sanding.
Regular cleaning is recommended to prevent sweat, oil, and moisture buildup.
Special sauna care oils help preserve the wood’s natural color.
Excessive water accumulation should be avoided.
Sauna ventilation should be done regularly.
Excessive contact with metal surfaces should be avoided.
Periodic checks are recommended for areas directly exposed to high heat.
Novawood offers Thermowood products specially selected and meticulously processed for sauna projects.
Low moisture response thanks to uniform thermal modification
Complete removal of resins
High stability and minimal deformation
Warm and aesthetic interior appearance
Chemical-free, eco-friendly production model
Special product options with profiles ideal for sauna use
Novawood Thermowood products provide top-level performance in durability, health, and aesthetics for both luxury spa concepts and boutique sauna projects.