Open Source Details: Designing with Hemp + Lime

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.

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.

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.

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.

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.

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.

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.

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.