We are Arbor Wood Co.

Domestically Produced TheRMOWood®

Arbor Wood Co. produces Thermowood® for a variety of outdoor and indoor applications including siding, decking, and architectural millwork. Our process starts by using domestically-sourced and responsibly-harvested wood which is thermally modified using only heat and steam. The result is a high-quality, performance-driven material, which sustains the natural beauty and design element of wood all without the use of harsh chemicals.

What is ARbor wood?

Arbor Wood is thermally modified wood produced in a specialized, 3-phase kiln chemical free process using only heat and steam. An initial gradual increase in temperature reduces the equilibrium moisture content (EMC) of the wood. Phase 2 sees a rapid spike in temperature and is where the magic really happens. The cellular composition of the wood is altered in this high-heat, oxygen-deprived environment which converts the natural acids and sugars so as to no longer be a food source for mold, rot or fungal decay. This change also renders the wood ‘hydrophobic’, meaning it loses much of the natural tendency to absorb water going forward. As a natural byproduct of the process the wood takes on a richer, dark tone throughout giving it a look similar to that of exotic species. The 3rd and final phase introduces steam to cool the wood down and bring the EMC back up to a suitable level. Thermal modification is one of the most natural, chemical-free ways to extend the life of wood products.

Phase 1

Temperature Increase
The temperature in the modification kiln begins to increase, removing much of the pitch and sap in the wood. Steam is introduced to prevent the wood from checking in the high heat. The moisture content of the wood is reduced from 15-20% down to nearly zero.

Phase 2

Thermal Modification
Oxygen is removed from the modification kiln and peak temperatures are acheived. This high-heat, oxygen-deprived environment causes hydrolysis - a breaking of the bond between H2O and the wood’s hemicellulose. This phase is where thermal modification occurs.

Phase 3

Cooling & Re-Conditioning
Temperature is reduced by introducing steam. The steam cools and conditions the wood to a moisture content of 4-6% improving dimensional stability.

CORE VALUES

Great companies are built by people who care deeply about what they do, how they do it, and who they do it with. We protect our people, honor our craft, and take pride in doing meaningful work together.
We use time, materials, capital, and energy responsibly, with care for our business and the natural resources we rely on.
Our success is measured by the trust our customers place in us. We earn that trust through quality, reliability, and follow-through.