Thermo spruce wood is spruce that has undergone a thermal modification process involving heat and steam in the absence of oxygen. This process enhances the wood's properties, making it a popular choice for various applications, especially those demanding durability and resistance to harsh environmental conditions.

Key features and advantages Increased durability and stability: Thermal modification improves the wood's resistance to decay, fungi, and insects. It also significantly reduces shrinkage and swelling, making it dimensionally stable and less prone to warping and cracking. Natural and chemical-free: The process uses only heat and steam, making thermo spruce an environmentally friendly and non-toxic alternative to chemically treated wood. This is particularly important for applications like saunas, where indoor air quality is a concern. Enhanced moisture resistance: Thermo spruce has a lower equilibrium moisture content, making it less susceptible to absorbing moisture and therefore more resistant to mold and mildew. This property is crucial for outdoor applications and in high-humidity environments like saunas. Improved thermal insulation: The modification process enhances the wood's insulating properties, making it more energy-efficient.