Thermory Thermo Aspen sauna wood is a premium material engineered specifically for high-heat, high-humidity sauna environments. Thermo Aspen is produced in Estonia using Thermory’s proprietary thermal modification process, where the wood is heat-treated without chemicals to permanently enhance its performance inside saunas.

Thermo Aspen is prized for its light, clean appearance, smooth surface, and extremely low heat conductivity, making it ideal for sauna interiors where comfort and durability matter most. The thermal process removes resins and excess moisture, improving dimensional stability and allowing the wood to withstand repeated heating and cooling cycles without warping, cracking, or swelling.

This collection includes Thermory Thermo Aspen materials for all core sauna interior applications, including:

• Wall and ceiling cladding

• Bench boards and bench construction material

• Trim, moldings, and finishing profiles

Thermo Aspen’s minimal knots and consistent grain create a modern, refined sauna aesthetic while remaining comfortable to sit or lean against, even at elevated temperatures. Its naturally light tone brightens sauna interiors and pairs well with both traditional and contemporary sauna designs.

All Thermory Thermo Aspen sauna wood is chemically untreated, sustainably sourced, and safe for high-temperature use, making it an excellent choice for health-focused sauna users and professional sauna builders alike. Available in multiple profiles, board lengths, and pack configurations, Thermo Aspen supports custom layouts, tiered bench designs, and precision finishing.

Whether you are building a custom sauna from scratch or upgrading an existing room, Thermory Thermo Aspen delivers long-term stability, comfort, and a clean Scandinavian sauna look.