ThermoWood®
Thermally modified timber from Finland, treated by heat and steam with no chemicals.
ThermoWood is timber thermally modified in a controlled atmosphere of heat and steam (≈160–220 °C), with no added chemicals. The process darkens the tone, reduces the equilibrium moisture content and improves dimensional stability (less swelling/shrinkage) and resistance to fungi, which is why it's widely used in façades, decking and saunas. There are ranges oriented towards stability (Thermo-S) and towards durability (Thermo-D). As a trade-off, mechanical strength (bending/impact) decreases compared with the original timber, so it's prioritised for cladding and finishes rather than main structure.
For achieving outdoor durability without using biocides or toxic chemicals. Treatment using only heat and steam is an elegant, clean solution for façades that need to withstand the weather.
Chosen by Descarboniza. No company pays for what we say about it.
Go to their website480kg/m³
0.07W/m·K
B1 (con tratamiento ignífugo)
Tableros 5/4x6", 1x6, 1x6 Max, perfiles personalizables, longitudes 4-16 pies
Resistencia a pudrición clase 2estabilidad dimensionaldurabilidad 20 añoscladding exteriorinteriores.
744kg/m³
EPD ThermoWood Association
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Upgrade your listingTechnical questions and answers
- What is the carbon footprint (GWP) of ThermoWood®?
- ThermoWood® declares a GWP (A1–A3) of -666 kg CO₂e/m³ according to its verified EPD.
- What is the thermal conductivity (λ) of ThermoWood®?
- The declared thermal conductivity of ThermoWood® is λ = 0.07.
- What is the density of ThermoWood®?
- ThermoWood® has a declared density of 480.
- What is the fire resistance of ThermoWood®?
- The declared fire performance of ThermoWood® is B1 (con tratamiento ignífugo).
- Does ThermoWood® have an Environmental Product Declaration (EPD)?
- Yes. ThermoWood® has a verified EPD (S-P-02155) under EN 15804+A2.
- Is ThermoWood® a carbon-negative material?
- Yes. The biogenic carbon stored in ThermoWood® exceeds its manufacturing emissions (A1–A3), according to its environmental documentation.
Values as declared by the manufacturer or its EPD. Always check the current EPD/technical sheet for project-critical calculations.
