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Table of Contents
Introduction
Introduction
Hemp blocks and hempcrete are one of the many products that can be made from hemp plants, which presents us with an opportunity to sequester carbon in our buildings and infrastructure.
Low-Impact Building & Manufacturing Material
Low-Impact Building & Manufacturing Material
"Hemp masonry (also known as hempcrete, or hemp-lime composite) is a composite material made of hemp hurd – the inner woody part of the industrial hemp plant’s stem – lime binder and water. Sand can be added to minimise the use of lime binder and to provide a little thermal mass.
Although hemp masonry has recently become popular in the construction of homes with low environmental impact and good thermal performance, it has been used as a building material for at least 300 years. Hemp has also been used for fabric, ropes, and food for thousands of years. The industrial hemp plant used for these applications contains virtually none of the drug THC that is associated with marijuana.
As a building material, hemp masonry offers ecological and economic benefits from beginning to end: for the farmer, the processor, the builder, and the building occupant. Hemp masonry provides very good insulation at the same time as being highly vapour permeable, which makes for very comfortable buildings with good indoor air quality." - Your Home: Hemp Masonry
Hemp Hurd
Hemp Hurd
"Hemp hurds can be utilised for the production of concrete, known as “hemp concrete or hempcrete”, a bio-aggregate based material in which hemp hurds are pasted together with lime-based binders [84]. It should be observed that, whilst concrete made of hemp hurds is used for its thermal insulating properties and not for bearing loads, the possible exploitation of hemp-fibre tensile strength has been recently investigated with the aim of producing FRCs [58]. Hemp concrete is generally suitable to form building envelopes by casting between, or spraying against, temporary or permanent shuttering in situ, or by pre-fabrication of building blocks or panels [85]. This material is being increasingly recommended by eco-builders because of its low environmental impact associated with the use of a renewable raw material (hemp). Moreover, being vegetal, it enables carbon sequestration during plant growth [86,87]. ... it is characterised by very good thermo-acoustic properties and, also, by good levels of transpirability and hygroscopicity that make it a good regulator of the indoor moisture content, so contributing to better indoor air quality [88]. Stevulova et al. [86] tested the thermal conductivity of hardened concrete made of chemically modified dried hemp-hurds bonded with caustic-magnesite based cement. They measured values of thermal conductivity between 0.068 and 0.123 W/m K depending upon the samples’ density, thus found to be comparable with the values related to alternative conventional building-materials, such as aerated autoclaved concrete (AAC). For this reason, the authors stressed that hemp concrete should be preferred to conventional ones of equal functionality and thermal conductivity." -ScienceDirect: Hemp Hurds
Types of Hemp Use in Architecture
Types of Hemp Use in Architecture
Blocks
Blocks
Hempcrete
Hempcrete
"Hempcrete, or Hemp + Lime, is an eco-friendly building material. It blends the inner core of industrial hemp with a lime-based binder, creating a bio-composite. Although not a structural element, Hempcrete serves as insulation between frame members, reducing racking while internal framing supports structural loads." "100% natural biobased materials. No VOCs and contain no red-listed ingredients." "Preserves efficiency by eliminating all thermal bridging in the envelope." - Hempcrete
Spray
Spray
Hemp Block & Hempcrete Applications
Hemp Block & Hempcrete Applications
Insulation
Insulation
Cool Buildings
Cool Buildings
Noise Pollution
Noise Pollution
Hemp is known to be useful as an acoustic insulator, making it appropriate for apartments, homes, businesses, and any other places that often struggle with noise pollution.
Roadways Noise Pollution
Roadways Noise Pollution
This material can even be effecting in protecting both humans and wildlife from the negative effects of noise pollution from roads and highways.
Resources & Guides
Resources & Guides
Data for Builders & Designers
Data for Builders & Designers
Highway Noise Barriers
Highway Noise Barriers
Hemp for Buildings
Hemp for Buildings
Organizations
Organizations
International
International
Fibershed "is a non-profit organization that develops regional fiber systems that build ecosystem and community health. Our work expands opportunities to implement climate benefitting agriculture, rebuild regional manufacturing, and connect end-users to the source of our fiber through education. We transform the economic systems behind the production of material culture to mitigate climate change, improve health, and contribute to racial and economic equity."
Companies
Companies
North America
North America
Canada
Canada
Americhanvre "Our mission is to actively store carbon in the walls of our homes, and in doing so, to dramatically improve their energy efficiency in the process. We are dedicated to the development of applications for hemp and lime materials that reach beyond their capacity for thermal and fire resistance. At Americhanvre, we envision a future where hemp begins to bridge the gap between sustainability and affordability in our choice of building materials."
British Columbia
Hempcrete "We were the first to construct hempcrete houses in North America. They are more durable and built to last much longer than traditional builds, with less maintenance costs. Our homes are strong, beautiful, cost-effective buildings with low environmental impact that your family will enjoy for generations to come. "
USA
USA
Americhanvre "Our mission is to actively store carbon in the walls of our homes, and in doing so, to dramatically improve their energy efficiency in the process. We are dedicated to the development of applications for hemp and lime materials that reach beyond their capacity for thermal and fire resistance. At Americhanvre, we envision a future where hemp begins to bridge the gap between sustainability and affordability in our choice of building materials."
Hempitecture "a forefront figure in US hemp construction, collaborates with architects, builders, engineers, and developers. Together, we create energy-efficient, non-toxic, and carbon-absorbing environments. Looking to incorporate hemp-based insulation in your next project? We’re here to assist." "We can supply you the materials to create healthy, high-performing thermal insulation made from hemp, creating energy-efficient homes while also giving back to the environment by sequestering Carbon Dioxide."
Colorado
Colorado
Hemp and Block "Hemp and Block’s mission is to use hemp to create natural, high performance building materials for making healthy, sustainable homes and buildings that last for centuries."
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