Thermory Thermo Alder sauna wood is a thermally modified hardwood engineered for superior stability and durability in high-heat, high-humidity sauna environments. Through Thermory’s advanced thermal modification process, Alder is heat-treated without chemicals to permanently enhance its performance while developing a richer, more refined appearance.

Thermal modification removes resins and excess moisture, significantly improving dimensional stability and resistance to warping, cracking, and swelling during repeated heating and cooling cycles. This makes Thermo Alder especially well suited for custom sauna interiors, premium benching, and professional-grade installations.

This collection includes Thermory Thermo Alder materials for all primary sauna interior applications, including:

• Wall and ceiling cladding

• Bench boards and bench construction material
  

Thermo Alder offers a warm, deep tone with consistent color throughout the board, delivering a more uniform and elevated look than standard Alder. Its smooth surface and low heat conductivity ensure benches and backrests remain comfortable, even at higher sauna temperatures.

All Thermory Thermo Alder sauna wood is chemically untreated, sustainably sourced, and safe for high-temperature use. Available in multiple profiles, board lengths, and pack configurations, Thermo Alder supports precise sauna layouts, tiered bench designs, and clean architectural detailing.

Whether you are building a luxury home sauna or sourcing materials for a commercial project, Thermory Thermo Alder delivers long-term stability, comfort, and refined sauna aesthetics.