Finnish ThermoWood Association

The Finnish ThermoWood Association was formed in December 2000. The main roles of the association are quality control of the material, product classification and R D activities. Although ThermoWood production is primarily located in Finland, there is limited production in Austria and Estonia a small-scale production facility was also due to start producing in Canada at the end of 2004. 

A comprehensive series of tests have been performed on ThermoWood, which are detailed in the ThermoWood handbook, available from the Finnish ThermoWood Association (Mayes and Oksanen, 2002). A synopsis of the material properties is given below. 

The ThermoWood process has been developed in Finland (Finnish ThermoWood Association, 2003) and both hardwoods and softwoods are available in two classes - ThermoWood D (durability) and ThermoWood S (stability), where the ThermoWood D grade is treated at a higher temperature to allow use in exterior applications out of ground contact (hazard class 2). The process uses steam to limit the extent of pyrolysis, and control crack formation. A similar system called... 

Finnish ThermoWood Association (2003) ThermoWood Handbook. Wood Focus Oy, Helsinki... 

D. Mayes and O. Oksanen, ThermoWoodHandbook. Finnish Thermowood Association, Helsinki (2003). 

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