Hempcrete Blocks
Handmade hempcrete blocks built for breathable, energy-efficient wall systems. Designed for builders, contractors, and property owners who want a natural alternative to traditional insulation. Fire resistant, mold resistant, and built to support healthier indoor spaces.
Hemp Hurd, Lime Binder, Water
Specifications:
- Handcrafted, 18” x 6” blocks
- Density
- R-2.8 per inch
- Weight per block:
- Sound reduction up to 45 dB
- Non-load bearing
- Fire resistance up to 2 hours
Installation:
- Used with wood or steel framing
- Mortared or dry-stack (if applicable)
- Compatible with lime or clay plasters
- Sound reduction up to 45 dB
We work case by case. Contact us for custom blocks for your project needs.
Grown, processed, and manufactured in the Shenandoah Valley (Virginia, USA).
We do local delivery or pick up. Please contact us below.
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Why Hempcrete blocks?
Natural
Made from plant-based and mineral ingredients for breathable walls without synthetic binders.
mold resistant
Regulates indoor humidity & air quality, keeping mildew and mold out.
pest resistant
Hemp-lime does not serve as a food source for termites, unlike traditional wood framing.
Made in usa
Grown and processed in Virginia.
Built for your project
Handcrafted hempcrete blocks designed to fit your project — from new construction to renovation.
Hempcrete vs. Conventional Materials
How hemp stacks up to common wall materials.
What’s Possible with Hempcrete
How others are building sustainably with hempcrete.
Timber & Steel Frame Infill
Historic renovation
acoustic partitions
Fire seperation walls
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Custom projects
climate controlled spaces
Cultivation and harvest
We work with local farmers to grow industrial hemp specifically for its strong stalks. Once the plants are ready, they’re harvested at the right time to ensure consistent, high-quality material.
Separate the stalk
After harvest, hemp stalks are mechanically processed through decortication, a method that separates the woody inner core from the outer fibers. This process produces hemp hurd, the natural material used for animal bedding.
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Form & mold the blocks
The processed hemp hurd is blended with a lime-based binder & water, then placed into molds. Each block is carefully formed by hand to ensure consistent shape, density, and performance.
Curing
Once molded, the blocks are left to cure under controlled conditions. During this time, the lime binder hardens and begins to mineralize, strengthening the block without synthetic additives.
Quality check & delivery
After curing, each batch is inspected for consistency and performance. The finished blocks are then prepared for palletizing and delivery, ready for installation on-site.
Frequently Asked Questions
No. Hempcrete blocks are designed as non-load-bearing infill within timber or steel framing systems. The structural frame carries the load, while hempcrete provides insulation, moisture regulation, and fire resistance.
Hempcrete is significantly lighter and provides thermal insulation and vapor permeability that standard concrete does not. Unlike conventional concrete, hempcrete is carbon negative and helps regulate indoor humidity.
Yes. Hempcrete wall assemblies have achieved 60–120 minute fire ratings. The material chars when exposed to flame but does not ignite like exposed wood framing. Giving your family more time to evacuate in emergency situations.
When properly installed and protected with appropriate finishes, hempcrete can last for decades. The lime binder continues to mineralize over time, contributing to long-term durability.
Hempcrete is commonly used in new construction as wall infill, interior insulation for historic renovations, and acoustic or fire-rated partition walls in residential and commercial buildings.
Hempcrete typically requires breathable finishes such as lime-based plasters or mineral renders. These allow the wall system to maintain vapor permeability and long-term durability.
Learn more about hempcrete
Explore more about the benefits of hempcrete and how it's helping others.
lets get to work
Every project is different. Share your goals with us, and we’ll collaborate to deliver
materials that fit your needs.