Thermoash – the most popular type of wood for outdoor use.
Thermally modified wood, is wood that has been modified by a controlled pyrolysis process of wood being heated (> 180 °C) in absence of oxygen inducing some chemical changes to the chemical structures of cell wall components (lignin, cellulose and hemicellulose) in the wood in order to increase its durability. Low oxygen content prevents the wood from burning at these high temperatures. Several different technologies are introduced using different media including nitrogen gas, steam and hot oil.
The biological resistance against some micro-organisms and insects is improved. Shrinking and swelling is reduced up to 50–90%. The treated wood is somewhat darkened in colour. As a principle the heat treatment process can be done on all wood species.
Ecosrub commercialize thermoash in a variety of forms:
– industrial parquet
– facade profiles
– joinery board