Defining the Next Generation of Thermally Modified Wood

What Builders, Architects, and Dealers Will Value Most

In Part 1 of this series, I made the case that thermal modification is a manufacturing discipline, not simply a kiln purchase. In Part 2, I explored why every species requires its own manufacturing approach and why those differences matter in the finished product.

The thermally modified wood market has grown tremendously over the past two decades. As it's matured, the conversation has shifted from what thermally modified wood is to how consistently it can be produced.

And that's an important distinction.

For years, architects and builders focused on understanding the benefits of thermally modified wood, including its dimensional stability, durability, and resistance to decay. These are all important, but today, those same customers are asking different questions.

• Can production keep up with my project?
• Can the manufacturer support custom profiles or changing specifications?
• Who is manufacturing the product?

The questions are not specifically about the wood product. They are manufacturing questions, and that marks an important shift in the conversation.

Confidence and Dependability

Every successful project depends on more than a quality product. It depends on confidence that the product arriving tomorrow will perform the same as the one that arrived today, and that it will perform the same in five to ten years and beyond.

Builders build their reputations on materials that consistently result in happy customers, repeat business, and no callbacks. Architects design with aesthetics, sustainability, and long-term durability in mind. Dealers commit to inventory, cost, and delivery timelines for their customers. When the process and product become unpredictable, the effects extend well beyond a delayed shipment.

Increasingly, dependability has become part of the specification.

That dependability isn't built at the end of the manufacturing process. It's built into the process itself, which is why operational control matters.

It's the result of consistent sourcing, documented production methods, experienced operators, quality control, and the ability to make decisions quickly when conditions change.

The more of the process you control, the fewer surprises your customers have to deal with. 

Operational Control = Predictability

Over the past several years, manufacturers across nearly every industry have been reminded how quickly supply chains can shift.

Whether the disruption comes from transportation, labor shortages, shifting demand, international shipping, or changing trade policy, one thing has become clear: the manufacturers best positioned to respond are those that control the greatest share of their own processes.

That’s why operational control matters. It turns manufacturing decisions into predictable outcomes.

At Westwood Millworks, every board begins with domestically sourced lumber. From there, it moves through thermal modification, milling, quality control, and, when required, pre-finishing, all within our Macon, Georgia, facility.

Every step informs the next.

The people operating the thermal modification kilns work alongside the team milling the finished profiles. The team milling the wood understands how each production run behaves during the modification process, and if an adjustment is needed, the people making those decisions work together under the same roof.

That’s how we’ve chosen to build Westwood.

It's also why we can respond quickly when customers need answers, custom solutions, or production adjustments. 

The Compounding Effect of Experience

One thing we’ve learned over the years is that manufacturing knowledge doesn’t happen all at once. It accumulates over time. 

Every production run teaches something.
Every new species presents a challenge.
Every project provides feedback.

Some lessons confirm what you thought you knew, while others force you to rethink the process entirely.

That's how manufacturing improves.

That's also why operational control grows more valuable over time. When the same team designs the process, operates the equipment, mills the finished profiles, and works directly with customers, every lesson stays within the organization and informs the next production run.

You can't shortcut that kind of experience. It has to be earned. 

An Evolving Wood Market

The continued growth of thermally modified wood is good for everyone in our industry.

More manufacturers mean greater awareness. More architects are specifying the material. More builders are discovering where it performs best. More homeowners are seeing what modified wood can offer. 

As the category continues to mature, though, buyers will naturally begin looking beyond the material itself and toward the company behind it.

• They'll ask who makes it.
• How it's manufactured.
• Whether production is repeatable.
• Whether technical support is available.

Whether the company behind the product has the experience to deliver the same level of quality, project after project.

Those are healthy questions, and they reflect a market that's becoming more knowledgeable and more sophisticated. That shift also points ahead to what matters next.

Looking Ahead

We built our first proprietary kiln in 2007 because there wasn't an established path for producing thermally modified wood at an industrial scale in the United States.

Nearly two decades later, the value of what’s been built isn't simply the equipment. It's the manufacturing system surrounding it that carries the work forward.

It's the manufacturing system surrounding it.

The species knowledge.
The modification protocols.
The milling experience.
The quality standards.
The operational control that connects every step of the process. 

This series began with a kiln and ends with operational control, because the equipment matters, the species matter, and the process ties everything together. 

The equipment matters.
The species matter.

What ties everything together is the ability to understand the material, refine the process, and stand behind every board that leaves our facility.

In the end, what happens before a board reaches a job site is not incidental to the product. 

It is the product.

 

Peyton Turner is President of Westwood Millworks, a Macon, Georgia manufacturer of thermally modified wood. Since 2007, the company has run proprietary kiln technology it designed and built in-house, turning North American hardwoods and softwoods into its ThermA Decking™ and ThermA Siding™ lines. Inspired by Nature. Perfected in Georgia.