Thermally Modified Timber 2.0: Plus 15 °C for Resistance Class 1
The main reasons for treating wood at high temperatures is to obtain increased biological durability and improved dimensional stability for domestic wood species.
Elementary research in Finland during the 1990s already made the point. The significant increase in durability of domestic wood species requires peak temperatures of at least 225 °C over at least 3 hours. The reality of industrial implementation showed less intensive high-temperature treatments. As a result, durability classes within single production batches may vary between class 1 and class 4. Swero's process is based on the research findings of the 1990s with externally certified durability class 1 for domestic coniferous species like Spruce, Fir, and Pine.