Black Locust Lumber The American Hardwood Replacing Tropical Decking

Build with a material engineered by nature and proven over time. Black Locust Lumber delivers unmatched durability, natural performance, and a new standard for exterior design.

What We Mill

Black Locust Products

Black Locust Lumber is a fully integrated sawmill in central Pennsylvania,  supplying Black Locust products throughout the United States.
Black Locust Lumber

Our Portfolio

Benefits

Benefits of Black Locust

Building the Future with natural black locust lumber

Natural Rot Resistance

Inherently resistant to decay without any chemical treatment.

50+ Year Lifespan

Exceptional longevity that outlasts most conventional materials.

Domestic Hardwood

Locally sourced, supporting sustainable domestic forestry.

No Chemical Treatment

Pure, untreated timber — safe for people and the environment.

No Maintenance

Set and forget — black locust asks for nothing once installed.

Ages to Silver Patina

Gracefully weathers to a distinguished silver-grey over time.

partners

Proudly collaborating

Introducing our ever-growing professional network

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https://architecture.catholic.edu/
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https://architecture.catholic.edu/
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https://www.rhainc.net/
https://cbi-sd.com/
https://www.wbcnet.org/member_news/wdg-architecture-launches-special-projects-initiative-with-gift-to-catholic-university/
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DNA Paris Design Awards 2024 WinnerProduct of Best 2024Gold Award

A high-performance permeable paver system built from naturally durable Black Locust

Learn about Proflow
“Nature already engineered the perfect material, we just refined it for design.”
About

The original pioneers of Black Locust as an architectural hardwood.

Black Locust Lumber transformed Black Locust from a traditional agricultural material—once used for fence posts and firewood—into a complete architectural product line. For over 25 years, we’ve led its evolution into premium siding, decking, and paver applications, positioning it as a true domestic alternative to tropical hardwoods.As a U.S.-based, fully integrated sawmill, we work exclusively with Black Locust. Sourced from the Appalachian region and crafted by skilled local craftsmen, every step of our process is focused on refining and elevating this single species—bringing it to the forefront of modern architectural design.

Our mission

To pioneer Black Locust as North America's next-generation architectural hardwood.

Our mission is to elevate a native U.S. species—long trusted by farmers for its strength and durability—into the forefront of modern building. We are committed to educating the market on Black Locust as a high-performance alternative to tropical hardwoods, while championing real, natural wood over composites and energy-intensive modified materials. By advancing its use in decking, siding, and outdoor design, we aim to redefine how architects and builders specify wood—grounded in authenticity, longevity, and American-grown craftsmanship.