About us

Thermoarena is a fast growing and evolving company that is constantly looking for new ways to improve its products and introduce new technologies.

We produce over 28.000 m3 of thermally modified wood per year and over 90% of our production we export to more than 30 countries all over the world.

Thermoarena is a reliable partner for its customers and suppliers, as we have had a AAA credit rating for many years.

Many of our employees have more than 20 years of experience in the production of thermally modified wood products. Thanks to highly experienced employees, we guarantee the high quality of our products.
We also help other companies to create longer-lasting products by providing a thermo modification service for the lumber used in their production or by selling them high quality PEFC (Licence number PEFC/19-31-36) or FSC® (C114364)  certified thermally modified lumber from our own stock.

All our softwood raw material is PEFC (Licence number PEFC/19-31-36) or FSC® (C114364)  certified.

cubic meters of thermally modified wood per year


of production exported<br>


countries export<br>


years of experience<br>




Let’s make a smaller ecological footprint together!

There is no longer any doubt that the climate is changing, or that this change is amplified by human activity.

At least 60% of climate change can be attributed to CO2 emissions resulting from human activities.

There are two ways to reduce CO2, in the atmosphere. By reducing emissions, or by removing CO2 and storing it – reducing ”carbon sources” and increasing ”carbon sinks”

Wood has the unique ability to do both.

There is no other commonly used building material that requires so little energy to produce as wood.

Thanks to photosynthesis, trees can capture CO2, in the air and to combine it with the water they get from the soil to produce the organic material, wood.

The production and processing of wood are not only energy-efficient, giving wood products an ultra-low carbon footprint, but wood can often be used as alternative for steel, aluminum, concrete or plastic, which require large amounts of energy to produce.

In most cases the energy necessary for processing and transporting wood is less than the energy stored by photosynthesis in the wood.

Every cubic meter of wood used as an alternative for other building materials reduces CO2, emissions the atmosphere by an average of 1,1 ton. If this is added to the 0,9 ton of CO2 stored in wood, then each cubic meter of wood saves a total of 2 tons CO2.

Based on these figures, a 10% increase in the percentage of wooden houses in Europe would produce sufficient CO2 savings to account for 25% of the reductions prescribed by the Kyoto Protocol.

Today, when architects and engineers design buildings like schools, offices, factories, government offices, they look more and more to use timber related products.

Timber building is part of future energy-efficient building.
Wood is sustainable, CO2 neutral and a highly effective insulator, creating excellent living conditions.

If we want to use more wood in construction, one of the challenges is to extend the lifespan of wooden products.

Thermo modification ensures a longer lifespan for wooden products without the use of chemicals that are harmful to nature.

In the construction of wooden buildings, in addition to the durability of wood, the fire resistance class of wood is also important, especially in the case of public buildings. In cooperation with the company Burnshield, we offer thermally modified wood impregnated with Burnblock fire retardant chemical.

Burnblock fire retardant is 100% natural, biodegradable, pH-neutral, non-corrosive and the first in the world to be awarded the Cradle to Cradle Certified (C2C or Cradle to Cradle) Gold certificate.

Long-lasting thermal wood products with Burnblock fire retardant create many new possibilities for the construction of modern wooden buildings.


Thermoarena OÜ has been awarded two sustainable supply chain  certificates — FSC® (C114364)  and PEFC (Licence number PEFC/19-31-36).
FSC® and PEFC (Licence number PEFC/19-31-36) are widely recognised global schemes for assessing sustainable forest management, under which compliance with set standards is confirmation that the forest is being managed in a balanced manner, in environmental, social and economic terms.