Thermory's Spruce timber boards undergo a thermal modification treatment that involves no chemicals in the process or in the final product. The dark color and enhanced biological durability are achieved by subjecting the timber to elevated temperatures for an extended period. After thermal modification, the timber is cut to size, molded into profiles, and any defects are removed. The thermal modification of timber enhances its biological durability, making it suitable for both indoor and outdoor use, even in contact with weather elements such as rain and sunlight. Decking and cladding are the most common applications. Thermally modified spruce timber cladding and decking boards. Heartwood, sapwood and knots may be present in the final product. Colour of thermally modified timber has homogenously turned darker and durability against biological agents has become higher.