Thermo-processing of wood is ecologically clean and environmentally friendly. It takes place at a temperature between 170 and 230ºC under the influence of hot air and steam, without the use of any chemicals.
Thermo-processing emphasises the characteristic texture of any wood which undergoes it. By varying the length of the process the wood can be given different tones of brown. The result of such processing is that the material achieves an even colour throughout the wood, becoming darker and more weather and rot-resistant.
Thermo-processed wood is darker than natural wood, more weatherproof and more resistant to rot. Its insulation qualities are better, it suffers from less moisture deformation and is more stable. The equilibrium moisture is up to 50% less than natural wood, which makes thermo-processed wood a better option for use in outdoor conditions.
In outdoor conditions when exposed to UV-rays thermo-processed wood will go naturally and beautifully silver gray without using its weatherproof charactestics. You can use any transparent or stained UV protection oil on the wood, if you wish to avoid this.