About Thermally Modified Wood
With our unwavering commitment to superior sourcing standards, this simple yet powerful combination is all it takes to craft unparalleled products, redefining the benchmarks for rot resistance, durability, and eco-friendly products.
How does thermal modification work?
PHASE 1
Temperature Increase
Within the modification kiln, the temperature ascends, expelling a substantial portion of pitch and sap from the wood. Introducing steam serves the purpose of averting checking in the heightened heat. Consequently, the moisture content of the wood undergoes reduction, transitioning from 15-20% to nearly zero.
PHASE 2
Thermal Modification
The modification kiln operates by excluding oxygen and attaining peak temperatures. In this environment of high heat and oxygen deprivation, hydrolysis occurs—resulting in the separation of the bond between H2O and the wood's hemicellulose. This transformative phase is where thermal modification takes place.
PHASE 3
Cooling & Re-Conditioning
The introduction of steam serves to lower the temperature. This steam, in turn, cools and conditions the wood, bringing its moisture content to a range of 4-6%. This process enhances the dimensional stability of the wood.
Benefits of Thermal Modification
Sustainable. Natural. Local.
Headquartered in Macon, Georgia, Westwood Millworks has been pioneering the thermal-treatment of wood in the United States since 2004.