The thermal modification removes nutrients fungi and insects need — thermowood lasts 25+ years.

The heat treatment process stabilizes wood fibers, significantly reducing moisture absorption. This means thermowood maintains its shape and dimensions far better than untreated wood, even with changing humidity and temperature. You can expect minimal swelling, shrinking, and warping, ensuring your projects look great for years.

The thermal modification process removes the nutrients fungi and insects need, giving thermowood a service life of 25 years and beyond, even in demanding exterior applications. Read more about our process below.

Unlike chemically treated alternatives, thermowood is enhanced through a natural heat treatment process. No toxic chemicals or preservatives are used, making it completely safe for people, pets, and environment. At the end of its life, it can be recycled or used as biofuel without harmful emissions.

No preservatives, no impregnation, no toxins. Thermowood is produced using nothing but high heat and steam, making it safe for people, pets and the environment. Read more about the sustainability story.

The cellular structure of thermowood changes during treatment, improving its thermal insulation properties. Buildings using thermowood cladding and components benefit from better energy efficiency, potentially reducing heating and cooling costs. This makes it an excellent choice for eco-conscious building projects.

Heat treatment reduces moisture absorption dramatically, so boards keep their shape and joints stay tight through years of weather cycles. Read more about the technical details.

Thermowood has significantly lower equilibrium moisture content compared to untreated wood. This natural resistance to moisture absorption makes it ideal for exterior applications, saunas, and humid environments. The wood dries faster when wet and is less prone to rot, mold, and fungal growth.

The heat treatment process naturally darkens wood, creating beautiful warm tones ranging from honey amber to deep coffee. The grain pattern becomes more pronounced, giving thermowood a distinctive, premium appearance. The color is consistent throughout the board, not just a surface stain.