Westwood Timber Group

What Westwood Timber Group does

Westwood Millworks (operating under the Westwood Timber Group umbrella) is a privately held U.S. manufacturer of thermally modified wood products, headquartered and producing in Macon, Georgia since 2004. The company runs a 3-phase kiln process that uses heat and steam to alter wood's hemicellulose, producing enhanced dimensional stability, rot and insect resistance, hydrophobicity, and approximately 30% better insulating properties than natural wood, all without chemical treatments. Its inputs are domestically harvested Ash, Poplar, and Pine species.

The commercial portfolio is concentrated under the ThermA brand and spans four core lines: ThermA Decking for outdoor applications, ThermA Siding for exterior cladding, ThermA Planking for interior walls and ceilings, and ThermA Fluted for architectural millwork. Additional products serve specialty applications such as saunas, furniture, musical instruments, and standup paddleboards. The company does not publicly publish pricing, instead routing purchases through quote-based direct sales and authorized dealers.

Westwood Millworks sells to both trade professionals (architects, builders, contractors) and residential homeowners, primarily across the United States with an active Canada presence indicated by dual CAD and USD e-commerce pricing. The model is sales-led: a Contact Sales team handles enterprise and custom orders, while a Where to Buy locator and sample-request tool drive dealer-channel demand. Revenue is not publicly disclosed, no funding rounds are documented, and there is no parent company or institutional investor identified in the source material.

Name

Westwood Timber Group

Legal name

Westwood Millworks

Website

https://thermotreatedwood.com

Company type

Private

Founded year

2004

Operating status

Operating

Headcount range

11–50 employees

Short description

Westwood Millworks is a privately held Macon, Georgia manufacturer of thermally modified wood decking, siding, planking, and fluted products sold under the ThermA brand to builders, architects, homeowners, and specialty manufacturers across the United States and Canada.

Ownership category

akta.pro rank

Product category

Thermally Modified Wood Products

NAICS

Sawmills and Wood Preservation (3211), Other Millwork (including Flooring) (321918), Wood Product Manufacturing (321), Softwood Veneer and Plywood Manufacturing (321212)

SIC

Lumber & Wood Products (No Furniture) (2400), Millwood, Veneer, Plywood, & Structural Wood Members (2430)

akta.pro primary industry

Wood Treatment & Preservation for Engineered Wood Products (IMAMACAM)

akta.pro secondary industries

Treated Wood & Preserved Timber Products (IMADADAE), Wood Mouldings, Millwork & Trim (IMADADAG), Engineered Wood Siding, Trim & Mouldings (IMAMACAI)

Keywords

• Thermally modified wood
• Wood decking products
• Exterior wood cladding
• Wood building materials
• Interior wood planking

Headquarters

HQ city

Macon

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Marketing or Sales, Infrastructure

Revenue model

1. Thermally Modified Wood Product Sales: Revenue is generated through the sale of thermally modified wood products including ThermA Decking, ThermA Siding, ThermA Planking, and ThermA Fluted. Products are sold through direct sales and dealer/distributor networks primarily in the US and Canada.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Westwood Millworks manufactures and sells thermally modified wood products under the ThermA brand, including decking, siding, planking, and fluted profiles. The company operates a 3-phase kiln process using heat and steam to modify domestic wood species (Ash, Poplar, Pine) at the cellular level, producing durable, stable, chemical-free wood for exterior and interior construction applications.

Product overview

Westwood Millworks offers a unified product line of Thermally Modified Wood products marketed under the ThermA brand. The portfolio consists of ThermA Decking (outdoor decking), ThermA Siding (exterior cladding), ThermA Planking (interior wall/ceiling applications), and ThermA Fluted (architectural fluted profiles), all manufactured using the same proprietary thermal modification process. The company also sells Other Products for specialized applications. All products are made from domestically harvested wood species (Ash, Poplar, Pine) processed through a 3-phase kiln thermal modification method using heat and steam without harsh chemicals.

Differentiator

Problem solved

Functional benefit

Brands

• ThermA Decking: Thermally modified wood decking products made from species including Ash and Pine
• ThermA Siding
• ThermA Planking
• ThermA Fluting

Products and services

• ThermA Decking

Quantifiable outcome

• Insulating qualities up to 30% better than natural wood
• +2 more outcomes

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators2 records

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• Trex Company: Public composite decking giant capturing share of the same outdoor-wood-application market Westwood serves with ThermA Decking — competing substitute at massive scale and well-funded distribution.
• TimberTech (AZEK): Large US composite decking and railing manufacturer — a much broader incumbent substitute product that competes for the same decking/siding specification slots, but at significantly larger scale through big-box retail.
• Royal Building Products (Cornerstone Building Brands): Large North American manufacturer of exterior building products including cellular PVC siding, vinyl, and trim — competing substitute in Westwood's ThermA Siding category through broader distribution.
• LP Building Solutions: Public engineered wood building products company (LP SmartSide siding, etc.) — substitutes in the exterior-siding category where ThermA Siding competes, with much larger scale and retail penetration.

Direct peers

• Thermory: Estonia-based global leader in thermally modified wood decking, cladding, and paneling — the most direct international competitor using the same heat-and-steam treatment philosophy across hardwood and softwood species.
• Kebony: Norwegian producer of thermally modified wood (and furfurylated alternatives) for decking, cladding, and architectural applications — directly comparable product technology and premium channel positioning.
• Arbor Wood: US-based thermally modified wood manufacturer (Thermowood process) producing decking, siding, and dimensional lumber — directly competes in the same North American channels and product categories as Westwood.
• Prowood (Lunawood): Finnish thermally modified wood producer (Lunawood brand) serving decking, cladding, and interior applications worldwide — competes on the same technology platform as Westwood, especially in premium distribution.
• Nova Products (Tropical Hardwoods): Distributor/processor of tropical hardwood decking and siding (e.g., ipe, cumaru) — directly competes in premium exterior decking/siding applications where Westwood positions thermally modified domestic species as a sustainable alternative.

Regional players

• Humboldt Sawmill Company (Humboldt Redwood): US West Coast redwood lumber producer serving decking, siding, and outdoor applications — overlapping in siding/decking end-use segments where thermally modified wood is positioned as a more stable alternative.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/profile.php

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Westwood Timber Group