There's a hardwood growing in your field that can be ready for harvest in 90 days. It's harder than red oak, takes stain beautifully, and sequesters carbon rather than releasing it. It's called HempWood — and it's changing the way we think about sustainable wood manufacturing.
HempWood isn't a new concept, but recent advances in processing technology have made it viable at commercial scale. What was once a curiosity is now a flooring product available from a small number of manufacturers — and the implications for sustainable construction are significant.
Key Takeaway
HempWood is a hemp-based hardwood alternative with a Janka hardness rating of 22% higher than red oak, a 90-day growth cycle, and a carbon-negative manufacturing footprint.
HempWood flooring planks. The material's warm grain closely resembles traditional hardwood.
What exactly is HempWood?
HempWood is made from the stalks of industrial hemp plants that have been compressed under heat and pressure with a natural, soy-based adhesive. The process orients the hemp fibers longitudinally, mimicking the grain structure of traditional hardwood. The result is a dense, dimensionally stable plank that can be milled, finished, and installed exactly like conventional hardwood flooring.
The manufacturing process was pioneered by a company called HempWood out of Murray, Kentucky — the same company that holds the trademark on the name. Their product is currently the most commercially available HempWood product in the United States, though the process itself can be replicated and adapted.
How it's made
The process follows a few key steps:
- Harvesting the hurds. Industrial hemp stalks are harvested and the woody inner core (hurds or shives) is separated from the outer bast fibers.
- Fiber preparation. The hurds are cleaned, dried, and processed to achieve consistent fiber length and moisture content.
- Compression molding. The prepared fibers are mixed with a soy-based adhesive and pressed under high temperature and pressure into planks.
- Milling and finishing. The resulting planks are milled to standard flooring dimensions and can be finished with any conventional hardwood finish.
How does it perform?
This is where HempWood gets genuinely interesting. The Janka hardness test measures the force required to embed a steel ball into a wood surface — it's the standard measure of hardness and durability for flooring applications.
| Material | Janka Hardness (lbf) | Growth Cycle |
|---|---|---|
| HempWood | 1,550 | 90 days |
| Red Oak | 1,290 | 80–120 years |
| White Oak | 1,360 | 80–120 years |
| Brazilian Cherry | 2,350 | 40–80 years |
| Bamboo (strand woven) | 3,000+ | 3–5 years |
At 1,550 lbf, HempWood outperforms both red and white oak — the two most common hardwood flooring species in North America. It's not the hardest material on the list, but it's harder than the woods it most directly competes with, and it grows in a fraction of the time.
A red oak tree takes up to 120 years to reach maturity. Hemp is ready for harvest in 90 days. That's not a marginal sustainability improvement — it's a fundamental shift in how we source building materials.
The carbon story
Industrial hemp sequesters approximately 1.63 tonnes of CO₂ per tonne of hemp produced — more than most other crops, and significantly more than forestry operations on a per-acre basis. When that hemp is turned into a long-lived product like flooring, the sequestered carbon stays locked in the material for the life of the building.
Compare this to conventional hardwood flooring, which requires logging (releasing stored carbon), transportation (fossil fuels), and often comes from forests that take decades to regenerate. The lifecycle carbon footprint of HempWood is dramatically lower.
What are the limitations?
I'd be doing you a disservice if I didn't address the current limitations honestly:
- Limited availability. HempWood is still a niche product. There are only a handful of manufacturers, supply chains are not fully mature, and pricing reflects that.
- Cost premium. Expect to pay a premium of 20–40% over comparable hardwood flooring, depending on the species you're comparing and your geographic location.
- Moisture performance. Like all wood-based products, HempWood is sensitive to moisture. It should not be used in wet areas without appropriate vapor barriers and moisture management.
- Limited product range. Currently, HempWood is primarily available as flooring planks. Dimensional lumber, panels, and structural products are not yet widely available.
Harry's Take
HempWood is a genuinely exciting product. The hardness numbers are real, the carbon story is real, and the aesthetics are beautiful. If you're building a home and want a sustainable flooring option that performs as well as oak, it's worth investigating seriously — just go in with clear eyes about current pricing and availability.
Where is HempWood heading?
The trajectory is encouraging. As hemp cultivation becomes more normalized in North America following the 2018 Farm Bill, more farmers are growing industrial hemp and more processors are developing the infrastructure to turn it into finished products. Competition drives prices down. Supply chains mature.
The biggest opportunity ahead is in structural applications — dimensional lumber alternatives and engineered wood panels. If hemp-based materials can displace even a fraction of the oriented strand board and plywood used in framing, the carbon impact would be enormous. Several research programs are actively working on this, and it's a space worth watching.
For now, HempWood flooring is an excellent, practical choice for anyone building or renovating and looking for a sustainable alternative to conventional hardwood. It's not perfect — no material is — but the fundamentals are sound and the product performs.
