…boasts with increased durability and is therefore suitable for timber cladding of facades and rain protection barriers. With no extra chemical protection its’ lifespan reaches up to 30 years. The durability of thermally treated wood is greater because of the decomposition of hemicellulose when reaching 212 °C. The hemicellulose is the main cause of wood decay, resulting in decomposition of wood and thereby contributing to its reduced durability. Thermally treated wood is also resistant to the main types of wood-attacking insects (furniture beetles, house longhorn beetles etc.). Thermally treated wood is not resistant to algae growing on its surface. The wood only offers them mechanical support, so they do not cause harm or reduce its durability. Algae growth can be prevented by applying surface protection.

Thermally treated wood is more stable than thermally untreated wood. After the wood is thermally treated, hygroscopisity, i.e. the ability to absorb or release water as a function of humidity, is also decreased. This is the reason why thermally treated wood responds to humidity changes more slowly, so wood shrinking and swelling are reduced. We offer the following tree species of thermally treated wood: Ash, Pine and Spruce.


 Thermally treated wood Ash  Thermally treated wood Spruce/Pine  Thermally treated wood Ash  Thermally treated wood Ash
THERMO ASH 1x antislip
do 4000 x 92/112/132 x 20 mm
do 4000 x 90/140/165/190 x
26/30/40 mm
do 4000 x 92 x 20 mm
do 4000 x 90/120/145 x 20/27 mm


Timber facade element

…can be considered the lungs and become a part of nature. In addition to weather protection timber facades have better aeration, adding to improved microclimate within the structure and its surroundings. The wood embraces the room and provides the feeling of warmth and familiarity. The external walls of structures are timber-clad completely or partially (roof windows, eaves, balconies) in the combination with other facade types. The Siberian larch and thermally treated conifers do not consist of harmful chemical substances, they are more resistant to wood decay and insects and over time develop a silver patina if they are not maintained.

Thermal treatment eliminates the resin within conifers. Consequently the resin does not leak or drip afterwards, therefore reducing the level of difficulty of maintaining wood surface. The density of thermally treated wood is about 10 % greater than that of the thermally untreated wood.

Facade elements from thermally treated wood are designed to offer insulation, ensuring long lifespan and minimal maintenance costs.


Thermally treated conifer wood Thermally treated conifer wood
– RHOMBUS up to 4000 x 68/90 x 26 mm
up zo 4000 x 150/140 x 16/18 mm