Thermowood Treatment

Tran Duc Homes is proud to be the first entity in Southeast Asia to possess a thermally modified wood processing kiln that meets European technology standards.

What is Thermowood?

Thermowood is a material treated using natural heat, temperature, and steam to enhance the technical properties of wood. Not only does thermowood not contain harmful substances, but it also boasts high stability and resistance to conditions such as termites, decay, warping, and cracking.

With its excellent adaptability to various climate conditions, Thermowood is an ideal solution for numerous interior and exterior applications. It can be observed that Thermowood is becoming a new trend in Green Architecture and Construction.

Wood Types: Ash, Pine, Iroko.

Currently, the thermal modification wood treatment method is classified into two standards, Thermo-S and Thermo-D:

• Thermo-S: The ‘S’ in ‘Thermo-S’ stands for “Stability,” indicating stability. The average expansion and contraction caused by moisture content after thermal modification treatment for Thermo-S wood is 6-8%. Thermo-S wood is relatively durable according to EN 113 standards, with a natural decay resistance level of 3. The thermal treatment temperature for Thermo-S wood ranges from 180 to 190 degrees Celsius. Thermo-S is commonly applied for both indoor and outdoor products (in dry environments).
• Thermo-D: The ‘D’ in ‘Thermo-D’ stands for “Durability,” indicating durability. The average expansion and contraction caused by moisture content for wood treated with Thermo-D is 5-6%. Thermo-D wood is classified as durable according to EN 113 standards, with a natural decay resistance level of 2. The thermal treatment temperature for Thermo-D wood is around 200-212 degrees Celsius. Thermo-D is typically applied for most outdoor projects or structures due to its excellent weather resistance.

Each type of thermally modified wood treatment standard has different applications in various architectural elements such as:

• Interior and exterior wood cladding
• Indoor and outdoor wood flooring
• Interior and exterior wood doors
• Exterior decorations like decorative laths, pergolas, etc.

Wood density is an important factor affecting the quality and durability of wood products. For various types of thermally modified wood, such as Ash, Pine, and Iroko, the average density ranges from 350 to 650 kg/m3 with moisture content of only 4% to 7%. Among them, Ash has the highest density, ranging from 595 to 620 kg/m3, with corresponding moisture content of 4.3% to 6%.

These figures demonstrate that thermally modified wood types offer superior sharpness and durability compared to ordinary wood.