Thermal wood is wood that has been treated with thermal modification, ie, a natural, non-toxic process that basically cooks the wood and changes its physical properties. The wood is slowly subjected to high heat in an oxygen-free environment. This high, gradual heat process also creates a darker surface color  and gives the wood a rich, deep brown color. This color gives a beautiful aged look to the wood.  The depth of the color and shade can be controlled with the level of temperature and its duration. This color can be maintained in exterior applications by finishing the wood with a natural oil finish like OSMO  on all sides and ends. Species that typically do not perform well in outdoor or wet environments can now be used in numerous other applications, such as decking, siding, or flooring. It can also be used in environments that are less stable, such as basements and bathrooms. Harsh chemicals are never used in the development of thermally modified products. Unlike pressure-treated lumber, it will not corrode metals or leave an unfriendly environmental residue. Above all, thermally modified woods are dimensionally stable with incredible durability. It is a wonderful product for exterior use as well as for interior floors.

the FOLLOWING ARE THE most popular thermally modified species. the depth of color and the shade of each product has been controlled by the temperature used and its duration.