Updated on December 6, 2022


Created on October 27, 2022


Upcoming Update

Hemp-lime composites for building insulation.

Developed By Unknown
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Product Description

Hempcrete is a composite made with hemp hurd and lime binder. It comes in two forms: cast in place and in premade blocks. It is a biocomposite building system that is used primarily for thermal envelope applications.

Market Suggested Retail Price


Distributors / Implementing Organizations

The product is sold online by the manufacturer

Manufacturing/Building Method

The product can be installed by casting in place using molds or as pre-cured blocks. The company is building a manufacturing facility in Jerome, Idaho (USA) that will be completed in 2022

Intellectural Property Type


User Provision Model

Users can obtain the product by purchasing online

Distributions to Date Status


Unit dimensions (cm)

60 x  30 and 15 cm depth

Primary materials

limestone, industrial hemp stalks

Complimentary materials


Fire Resistance (hr)


Thermal Insulation Capacity


Compressive Strength (MPa)

300 kPA (hempcrete blocks)

Suitable Climates

Not suitable for humid environments

Design Specifications

Hempcrete can be built in two forms: cast in place or purchased in blocks. Cast in place is an installation technique that involves using form boards and packing the Hempcrete in between form boards to create walls. Hempcrete blocks are a pre-cured solution for building insulation.  Hempcrete is a monolithic wall system that is best used as a thermal envelope for energy efficient building projects. It can be used for both renovations and new buildings.

Technical Support

Provided by the manufacturer

Replacement Components

Provided by the manufacturer



Manufacturer Specified Performance Parameters

Plant-based resource: Hempcrete is made with a renewable plant-based commodity, the hemps’ “Hurd” that is typically considered a waste product.  Carbon sequestration: Hemp absorbs CO2 during its growth. After mixing the hurd with the binder, CO2 is absorbed during the solidification process. 1 ft3 of hempcrete building material offsets approx- imately 7.27 lbeq of CO2. Insulation: Cast in place 10” thick hempcrete presents R2.5/inch. Moisture: It is capable of being exposed to humidity while maintaining their R value.  Sounds: Hempcrete attenuates sound transmission.

Vetted Performance Status

Intertek performed a fire test following ASTME 84. The hempcrete specimen obtained a 0 for flame spread and smoke development, on a scale from 0 to 450, making it fireproof


Potential hazards related to breathing powder dust of Limestrong (the products’ binder).

Complementary Technical Systems

The manufacturer also sells mixer machines to prepare Hempcrete. 

Academic Research and References


Compliance with regulations


Other Information


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