HempLime products are a superfood for the building industry. Products made from hemp and lime offer healthier alternatives in insulation, wall systems, textiles, and more because they do not contain harmful petrochemicals. Both hemp and lime absorb carbon dioxide from the atmosphere, and hemp plants also regenerate depleted soils while they grow. 

HempLime products are naturally resistant to pests, mold, and fire, eliminating the need for toxic chemical additives. HempLime products also improve interiors because they have excellent acoustic properties and naturally regulate humidity and heat. The insulative properties of HempLime make it an energy-efficient building material and require very little energy to produce. And hemp and lime products are naturally biodegradable. They can be fully recycled and reused to support a zero-waste economy

Also, the burgeoning hemp industry in the US supports regenerative economies and communities, tackling social justice issues through agriculture and workforce development.

Appendix BL Hemp Lime (Hempcrete) Construction is now available in the International Code Council's International Residential Code (IRC 2024)
 

Below are a few examples of HempLime products that meet our rigorous evaluation. For further help on your own search for hempcrete, scroll down to "Spec Guidance”.

HempLime

19 products
How to Use This List

About Our Collections

The goal of our collections is to help promote transparency in the material ingredients of building products by fostering knowledge and awareness of products and materials for which life-cycle information is available, and that have environmentally, economically, and socially preferable life-cycle impacts.

Keep an eye out for the following symbols:
A Healthier Affordable Building Product

Products with the designation of "Healthier & Affordable" were specified and installed in at least one of our Case Studies of healthier affordable housing.

Available at the Donghia healthier Materials Library

The Donghia healthier Materials Library library is open to Parsons student and faculty. Learn more about access and opening hours here.

Low Embodied Carbon

“Embodied Carbon” is the total amount of carbon emitted during the process of making a material. *HML refers to a manufacturer's EPD to determine whether a product's A1-A3 carbon emissions falls within HML's threshold for Low Embodied Carbon.

New Product

This product has been added to the collection within the past six months.

Product in Development

Products with this designation identify they are currently scaling or only available in markets outside of the building industry. they could be experimental or in use in capsule collections.

Available in the EU

Products with this designation are currently available only in the European Union and identified as being an exemplary healthy option in the respective product group.

Ingredient Disclosures

There are several ways of evaluating a material’s health that we include with product information. Disclosures are reports by manufacturers about product ingredients, impacts, or other attributes.

Key Disclosures include:
Health Product Declaration (HPD)

A voluntary technical specification for reporting information on product contents and associated health information, intended to be the health-analogue to Environmental Product Declarations (EPDs).

Declare Label

Declare is a transparency platform and product database that answers three questions:
1. Where does a product come from?
2. What is it made of?
3. Where does it go at the end of its life?

Environmental Product Declaration (EPD)

A standardized format for communicating the environmental effects associated with a product’s raw materials extraction, energy use, chemical makeup, waste generation, and emissions to air, soil, and water.

Safety Data Sheet (SDS)

A reporting format that provides basic information about a material’s chemical ingredients, the potential safety hazards to installers, and recommended practices for installation.

USDA Certified Biobased Product Label

Managed by the U.S. Department of Agriculture (USDA), the goal of the BioPreferred Program is to increase the purchase and use of biobased products.

Other
Learn More
Category Sub-category Manufacturer Product Ingredient Disclosures

Hemp Oil

Available At the Donghia Materials Library

Hemp oil is a healthier finish and works particularly well on wood. The Real Milk Paint’s Hemp Oil is free of additives, preservatives, solvents, and VOCs. It is thinner than tung oil, making it easier to apply without the addition of a solvent. However, hemp oil is less durable and waterproof than tung oil. Hemp oil is food safe and works especially well on lightly used items.


Category
Sealant / Surface, Oil_Hemp
Manufacturer
The Real Milk Paint
Product Website

Material composition*

Industrial Hemp Oil 100%

*as reported by the manufacturer

AVAILABLE SIZING

Available in 1 oz, 8 oz, 16 oz, 32 oz, and 1 gallon bottles

CERTIFICATIONS & DISCLOSURES
Health Product Declaration (HPD)
Declare Label
Environmental Product Declaration (EPD)
Safety Data Sheet (SDS) icon-pdf Created with Sketch.
USDA Certified Biobased Product Label
Other
Last Updated

August 02, 2023

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Hempcrete Block

Available At the Donghia Materials Library

IsoHemp’s hempcrete blocks are a non-load-bearing masonry product. These natural, healthy blocks are designed to be used for insulating envelopes, partition walls, and counter-partitions. Made only from hemp and lime, hempcrete’s ability to diffuse accumulated heat makes it a fantastic thermal regulator. This product also regulates humidity due to its permeability and is naturally very fire-resistant, making toxic flame retardants obsolete. Not only are IsoHemp hempcrete blocks good for human health, they also have a positive environmental impact. Their manufacture requires very little energy, and they act as a carbon sink, actively absorbing CO2 from the air.


Category
Insulation, HempLime
Manufacturer
IsoHemp
Product Website

Material composition*

Hemp (particle size of 2 to 20 mm) 80%, Hydraulic Lime 11%, Air Lime 9%

*as reported by the manufacturer

AVAILABLE SIZING

30 cm x 60 cm, available in 6, 9, 12, 15, 20, and 30 cm thicknesses

CERTIFICATIONS & DISCLOSURES
Health Product Declaration (HPD)
Declare Label
Environmental Product Declaration (EPD)
Safety Data Sheet (SDS)
USDA Certified Biobased Product Label
Other icon-pdf Created with Sketch.
Last Updated

May 09, 2024

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Hempcrete Blocks

Just Bio Fiber's hempcrete blocks are a breathable, durable, non-toxic alternative to typical structural wall assemblies. Made primarily from hemp and lime, these blocks are Declare Red List Free as well as naturally fire resistant. Wall systems built with these blocks regulate temperature and humidity while retaining heat. They also do not require a vapor barrier and are resistant to mold, insects, rodents, and mildew.


Category
Insulation, HempLime
Manufacturer
Just Bio Fiber
Product Website

Material composition*

Hemp Hurd 30-50%, Calcium Hydroxide 20-40%, Calcium Carbonate 10-30%, Calcium Magnesium Tetrahydroxide 10-30%, Kaolin 1-10%, Fibrous Glass 1-10%, Silica Sand 1%, Styrene 1%

*as reported by the manufacturer

AVAILABLE SIZING

21.3" x 10.7" x 8"

CERTIFICATIONS & DISCLOSURES
Health Product Declaration (HPD)
Declare Label icon-pdf Created with Sketch.
Environmental Product Declaration (EPD)
Safety Data Sheet (SDS)
USDA Certified Biobased Product Label
Other
Declare | Red List Free
Last Updated

May 09, 2024

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Tradical Hemcrete

Available At the Donghia Materials Library

Tradical® Hemcrete® is a highly sustainable hemp-lime product line designed to create insulating walls in new structures or to retrofit existing floors, roofs, and walls with thermally efficient, breathable insulating layers.


Category
Insulation, HempLime
Manufacturer
American Lime Technology
Product Website

Material composition*

Hemp, Lime (Calcium Hydroxide), Hydraulic Lime Binder, Calcium Carbonate, Calcium Silicates, Silica, Oxides of Magnesium, Aluminum, and Iron

*as reported by the manufacturer

CERTIFICATIONS & DISCLOSURES
Health Product Declaration (HPD)
Declare Label
Environmental Product Declaration (EPD)
Safety Data Sheet (SDS) icon-pdf Created with Sketch.
USDA Certified Biobased Product Label
Other icon-pdf Created with Sketch.
Last Updated

May 09, 2024

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Ecologic™ Plaster Takcoat Platinum

Available At the Donghia Materials Library

Takcoat is a lime plaster that can be used on interior or exterior / applications such as e.g., drywall or masonry. This plaster can be applied without a primer.

Limeworks are experts through their experience in masonry, historic restoration with Lime - Naturally Hydrated Lime (NHL).Production with NHL requires less energy, hence the release of CO2 is reduced considerably and NHL reabsorbs most of the CO2 during the curing process. The product contains no Portland Cement, 90% is sourced in the USA.


Category
Resilient, Limestone
Manufacturer
Limeworks
Product Website

Material composition*

High Calcium Hydrated Lime (>20%), Recycled Glass Aggregate (<70%), Proprietary Additives (<10%)

*as reported by the manufacturer

CERTIFICATIONS & DISCLOSURES
Health Product Declaration (HPD)
Declare Label
Environmental Product Declaration (EPD)
Safety Data Sheet (SDS) icon-pdf Created with Sketch.
USDA Certified Biobased Product Label
Other
Last Updated

October 10, 2023

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Ecologic Trademark Lime Injection Grout (Type I)

Available At the Donghia Materials Library

This specific Grout Grade is recommended to fill fine cracks up to a width 1/16 inch.

Limeworks are experts through their experience in masonry, historic restoration with Lime - Naturally Hydrated Lime (NHL).Production with NHL requires less energy, hence the release of CO2 is reduced considerably and NHL reabsorbs most of the CO2 during the curing process. The product contains no Portland Cement, 90% is sourced in the USA.


Category
Resilient, Limestone
Manufacturer
Limeworks
Product Website

Material composition*

Natural Hydraulic Lime (>99%), Proprietary Additives (<1%)

*as reported by the manufacturer

CERTIFICATIONS & DISCLOSURES
Health Product Declaration (HPD)
Declare Label
Environmental Product Declaration (EPD)
Safety Data Sheet (SDS) icon-pdf Created with Sketch.
USDA Certified Biobased Product Label
Other
Last Updated

August 02, 2023

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2/10’s 80/20 wool and hemp blend, Ivory

Available At the Donghia Materials Library

New York Textile Lab designs yarns and textiles with an economically diverse and sustainable supply chain at the forefront of their mind. The fibers used are grown on climate beneficial soil within the North Eastern Region.

This Hemp Wool Yarn is developed by the Textile Lab and produced with partnering manufacturers in the USA.


Category
Textile, Hemp
Manufacturer
NYTextileLab
Product Website

Material composition*

70% fine wool sourced from Oregon, 30% domestic hemp from Nebraska.

*as reported by the manufacturer

CERTIFICATIONS & DISCLOSURES
Health Product Declaration (HPD)
Declare Label
Environmental Product Declaration (EPD)
Safety Data Sheet (SDS)
USDA Certified Biobased Product Label
Other
Last Updated

July 11, 2023

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Hempwool

Hempwool insulation has a low carbon footprint, shows excellent insulation values, is hypoallergenic, and due to its ingredients allows for a non-hazardous installation. According to Hempitecture, the mix of 92% hemp fiber and 8% polyester is heated to bond and increase strength. Polyester is petrochemically based and will not biodegrade. Alternatives are other man-made substances, currently. We appreciate this North American-made product and look forward to a healthier option as it evolves. It contains 89% Biobased Content and has been awarded the USDA Certified Biobased Product Label in the BioPreferred® Program.

Note: Hempwool's declare R-value is 3.7/inch.


Category
Insulation / Fibrous, Cellulosic, Granular, Hemp
Manufacturer
Hempitecture
Product Website

Material composition*

92% hemp, 8 % polyester

*as reported by the manufacturer

CERTIFICATIONS & DISCLOSURES
Health Product Declaration (HPD)
Declare Label
Environmental Product Declaration (EPD)
Safety Data Sheet (SDS)
USDA Certified Biobased Product Label
Other
USDA Certified Biobased Product Label
Last Updated

April 01, 2024

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HES-hemp hurd

Hemp hurds are the tough woody interior of the hemp plant. It is harvested by decorticating - separating - the inner hurd material from the softer, fibrous exterior of the stalk.

The component silica (sand) in the plant prevents from burning or rotting and with the immense strength of the hurd it makes Hemp Hurd an versatile building material - it is used in, e.g., insulation and wall systems.

HES Hemp Hurd is mainly from Europe with the US distribution currently on the west coast.

The HES-hemp hurd R-value is declared at 3.1/inch.


Category
Pourables and Aggregates, Hemp Hurd
Manufacturer
Hemp Eco Systems Group
Product Website

Material composition*

100% pure crushed hemp hurd

*as reported by the manufacturer

AVAILABLE SIZING

HES approved Hemp Hurds in 44 lb bags

CERTIFICATIONS & DISCLOSURES
Health Product Declaration (HPD)
Declare Label
Environmental Product Declaration (EPD)
Safety Data Sheet (SDS)
USDA Certified Biobased Product Label
Other
Last Updated

June 20, 2023

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Ecologic Trademark LimeWash Platinum

Available At the Donghia Materials Library

Ecologic™ LimeWash Platinum is a mineral coating which bonds as crystals form in the pores of the substrate. It is breathable and due to substrate and mineral joined together, water or salts cannot cause the surface to bubble or flake.

Limeworks are serious experts through their profound experience in masonry, historic restoration and working with Lime - Naturally Hydrated Lime (NHL).Due to substantially less energy usage during production with NHL, the release of CO2 into the atmosphere is reduced considerably. Furthermore, Natural Hydraulic Lime (NHL) reabsorbs most of the CO2 during the curing process, while cement reabsorbs none.


Category
Paint / Mineral, Lime
Manufacturer
Limeworks
Product Website

Material composition*

High Calcium Hydrated Lime (>90%), Skimmed Milk Derivative (<1%), Borax (<2%), Alum (Aluminum Sulfate) (>5%), Bluing Agent(>0.005%)

*as reported by the manufacturer

CERTIFICATIONS & DISCLOSURES
Health Product Declaration (HPD)
Declare Label
Environmental Product Declaration (EPD)
Safety Data Sheet (SDS) icon-pdf Created with Sketch.
USDA Certified Biobased Product Label
Other
Last Updated

August 02, 2023

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Ecologic Trademark HempCrete Binder Platinum

Available At the Donghia Materials Library

Ecologic™ HempCrete Binder Platinum is a lime binder formula made in America. It is used to be mixed with hemp hurd for non-structural insulation, widely known as Hempcrete.

Limeworks are serious experts through their profound experience in masonry, historic restoration and working with Lime - Naturally Hydrated Lime (NHL). Production with NHL requires less energy, hence the release of CO2 is reduced considerably and NHL reabsorbs most of the CO2 during the curing process.


Category
Pourables and Aggregates, Binder
Manufacturer
Limeworks
Product Website

Material composition*

High Calcium Hydrated Lime (>90%), Proprietary Additives (<10%)

*as reported by the manufacturer

CERTIFICATIONS & DISCLOSURES
Health Product Declaration (HPD)
Declare Label
Environmental Product Declaration (EPD)
Safety Data Sheet (SDS) icon-pdf Created with Sketch.
USDA Certified Biobased Product Label
Other
Last Updated

August 02, 2023

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Kanabat Hemp Hurd

Hemp hurd is the tough woody interior of the hemp plant. It is harvested by decorticating - separating - the inner hurd material from the softer, fibrous exterior of the stalk.

The component silica (sand) in the plant prevents it from burning or rotting and with the immense strength of the hurd it makes Hemp Hurd a versatile building material - it is used in, e.g., insulation and wall systems.

Kanabat's hemp hurd is grown in France and distributed in the US via Americhanvre. According to the manufacturer, Kanabat is certified building grade by the Construire en Chanvre.


Category
Pourables and Aggregates, Hemp Hurd
Manufacturer
Americhanvre
Product Website

Material composition*

100% pure crushed hemp hurd

*as reported by the manufacturer

CERTIFICATIONS & DISCLOSURES
Health Product Declaration (HPD)
Declare Label
Environmental Product Declaration (EPD)
Safety Data Sheet (SDS)
USDA Certified Biobased Product Label
Other
Last Updated

April 05, 2021

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"Fifth Element" Binder

Hempire's Fifth Element hempcrete binder avoids cement. Per Manufacturer, this binder allows the creation of hempcrete with a dry density of around 260 kg/m3 (16.2 lb/ ft3) with improved thermal properties. The binder is mixed with hemp hurd and water and can be used in in-situ casting, spraying, fabrication of prefab panels, bricks, or blocks. The Manufacturer is registered in the US since 2018 and starting in 2021 distributes from within the country.


Category
Masonry, Hempcrete
Manufacturer
Hempire
Product Website

Material composition*

85% Hydrated Lime (CaO)

15% Natural Minerals

*as reported by the manufacturer

CERTIFICATIONS & DISCLOSURES
Health Product Declaration (HPD)
Declare Label
Environmental Product Declaration (EPD)
Safety Data Sheet (SDS)
USDA Certified Biobased Product Label
Other icon-pdf Created with Sketch.
Last Updated

March 23, 2021

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Lime Plaster

Available At the Donghia Materials Library

Limestrong's Artisan lime plasters are a healthier alternative to traditional wall finishes like paint. This plaster is made of lime, pumice, and a plant-based binder, all sourced from within the US. It is available in 3 finishes of varying levels of shine - Marble, Stone, and Sand. Limestrong uses natural pigments only and has created a palette of 98 colors using a combination of 8 naturally occurring minerals. These plasters are petrochemical and fragrance-free.


Category
Plaster, Lime
Manufacturer
Earthaus Plaster
Product Website

Material composition*

Calcium Hydroxide 50-75%, Amorphous Aluminum Silicate (Pumice) 25-50%, Crystalline silica, respirable powder 0.0001-1%

*as reported by the manufacturer

COLORS

98 colors

CERTIFICATIONS & DISCLOSURES
Health Product Declaration (HPD)
Declare Label
Environmental Product Declaration (EPD)
Safety Data Sheet (SDS) icon-pdf Created with Sketch.
USDA Certified Biobased Product Label
Other
Last Updated

August 02, 2023

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HES-Mix

Hemp Ecosystem's HES-MIX is a 100% natural premixed hemplime. It can be used for non-load bearing wall construction, insulation as well as for flooring construction. Made from hemp hurd and hydrated lime, it has a lower carbon footprint than conventional wall-assemblies. It is naturally fire resistant, rot/pest resistant, and humidity regulating. The drying time is approximately 2 days. So called" HES-plus" which is natural minerals from crushed stone can speed up the dry time.

R-Value of the wall unit is 3.1/inch.


Category
Masonry, Hempcrete
Manufacturer
Hemp Eco Systems Group
Product Website

Material composition*

93 - 98% high calcium hydrated lime, Hemp hurds, HESplus mineral binder and water

*as reported by the manufacturer

CERTIFICATIONS & DISCLOSURES
Health Product Declaration (HPD)
Declare Label
Environmental Product Declaration (EPD)
Safety Data Sheet (SDS)
USDA Certified Biobased Product Label
Other icon-pdf Created with Sketch.
Last Updated

May 31, 2023

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Lime Plaster

Heritage's Natural Hydraulic lime plaster is a traditional recipe from hydraulic lime and silica sand only. It can be used for repairs of plaster and stucco for buildings originally constructed without Portland Cement. It is breathable, allowing for increased moisture ventilation. Hydraulic lime can cure even in damp/wet conditions and is most suitable as plaster on porous construction materials such as brick, or stone. The Lime Stucco/Plaster comes as a dry material, water is mixed in on-site.


Category
Plaster, Lime
Manufacturer
US Heritage Group
Product Website

Material composition*

50-75% silica sand, 25-50% Hydraulic lime

*as reported by the manufacturer

CERTIFICATIONS & DISCLOSURES
Health Product Declaration (HPD)
Declare Label
Environmental Product Declaration (EPD)
Safety Data Sheet (SDS) icon-pdf Created with Sketch.
USDA Certified Biobased Product Label
Other
Last Updated

May 31, 2023

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Homeland Hempcrete

Homeland Hempcrete provides cast-in-place hempcrete wall assemblies. The hemp insulation is cast in timber wood framing. This hempcrete is a mix of hemp hurd, water, lime, and pozzolan. Their pre-made, pre-cured high-quality hemp wall panels are perfect for custom designs. They focus on localized supply chains, servicing most of their own installations. You can also purchase prefabricated wall assembly kits of four 4x8ft panels, lead time is about 6-8 weeks.


Category
Insulation / Fibrous, Cellulosic, Granular, Hemp
Manufacturer
Homeland Hempcrete
Product Website

Material composition*

SPF lumber, 41% Hemp Hurd, 45.5% High Calcium Hydrated Lime, 13.5% proprietary blend of natural pozzolans

*as reported by the manufacturer

CERTIFICATIONS & DISCLOSURES
Health Product Declaration (HPD)
Declare Label
Environmental Product Declaration (EPD)
Safety Data Sheet (SDS)
USDA Certified Biobased Product Label
Other
Last Updated

June 20, 2023

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HempBLOCK LB300

Low-Embodied Carbon Material

HempBLOCK USA pre-casts hempcrete into interlocking blocks. The LB 300 load-bearing system is for in-fill walls and load-bearing walls in both residential and commercial construction. The interlocking hempcrete block options include standard, post, and bond beam blocks. No mortar is required. Walls can be clad, rendered, or plastered after installation. Hemp is great for temperature regulation due to its open cell structure to allow moisture flow. Production is currently in France, but aim to have US-based production in 2025.


Category
Insulation, HempLime
Manufacturer
HempBlock USA
Product Website

Material composition*

84% hemp, 16% prompt natural cement (fired like lime at low temperature)

*as reported by the manufacturer

AVAILABLE SIZING

Block sizes: 1' 11 5/8", 11 13/16", 1 1/8"

CERTIFICATIONS & DISCLOSURES
Health Product Declaration (HPD)
Declare Label
Environmental Product Declaration (EPD)
Safety Data Sheet (SDS)
USDA Certified Biobased Product Label
Other icon-pdf Created with Sketch.
Last Updated

May 09, 2024

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EREasy Spray System

Used in Healthier Affordable Housing

Americhanvre's ErEASY is an efficient hemplime spray system. The spray is made of hemp hurd, water and binder 120 comprised of Vicat cement and a hydrated lime. The 120 binder is sourced from France and in future will be produced in the US. The application system is made of 100% American-Made components. The use of the system can speed up installation time and provides consistency in the mix. Trainings are provided. 

2.2 R-Value/inch


Category
Insulation / Fibrous, Cellulosic, Granular, Hemp
Manufacturer
Americhanvre
Product Website

Material composition*

Hemp Hurd, Water, Vicat Cement, Hydrated Lime, Undisclosed Binder

*as reported by the manufacturer

CERTIFICATIONS & DISCLOSURES
Health Product Declaration (HPD)
Declare Label
Environmental Product Declaration (EPD)
Safety Data Sheet (SDS)
USDA Certified Biobased Product Label
Other icon-pdf Created with Sketch.
Last Updated

June 18, 2024

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BENEFITS OF USING HEMPLIME PRODUCTS:

Interior Health: HempLime products are naturally pest, mold, and fire-resistant.

Interior Quality: HempLime products have excellent acoustic properties, and naturally regulate humidity and heat.

Energy Efficiency: The insulative properties of HempLime make it an energy-efficient building material and requires very little energy to produce. The amount of CO2 sequestered during hemp's growth exceeds the amount emitted during production. Similarly, the CO2 emitted while processing limestone to make lime is re-absorbed as lime cures.

Zero Waste: Hemp and Lime are naturally biodegradable and 100% recyclable and reusable.

Spec Guidance

Refer to the new code, published in 2024: “Appendix BA” in the International Residential Code (IRC). It applies to one- and two-family dwellings and townhouses. With hempcrete approved for residential building codes, it can more easily be approved and specified.

Hempcrete has recently passed US thermal resistance testing (R-value) required by the Federal Trade Commision for insulation. This testing identifies Hempcrete’s ability to regulate temperature, which is comparable to existing insulation standards.

Choose the hemplime application according to your needs: cast in place, pre-fabricated, or sprayed.

Clean Hemp Hurd. Keeping hemp hurd free of dirt and fibers is paramount to having a good end result.

Reference the R-value if using hempcrete for insulation. Hempcrete's R-value range is approximately 2.2-4.8/inch. Calculate the right mixture based on the desired insulation value and wall thickness.

Plan on collecting the overspray from spray-applied HempLime. Added back into the mix, it allows for minimizing waste.

HempLime mix should be free from cement additives. An ingredient disclosure will help you determine that.

Clay aggregates added to lime plaster are fast acting but can rapidly shrink. Seek guidance on the right composition for your project.

Use a lime binder that is specifically designed for HempLime building.

The type and coarseness of aggregate impacts the function of Lime products. Seek guidance on the right composition for your project.

As this industry grows, we will be able to find more US suppliers for Hemp and Lime products. This will contribute to lowering the carbon footprint.

As this is an evolving industry, aim to be knowledgeable about all parts of the HempLime ecosystem, including but not limited to, the agricultural and lime extraction processes, the latest construction practices, and building code changes.

Updated September 6, 2022

Related Videos

Winona Laduke speaks of Hemp as a leader for a Post-Petroleum Economy

Alison Mears and Jonsara Ruth at the Hemp Building Summit - October 24, 2019

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