Hemp Construction, or Hempcrete, is much like concrete and is used mostly to form insulating walls. Saint Astier® Natural Hydraulic Lime’s hemp construction product is called Batichanvre. It is mixed with strands of hemp to produce a lightweight, well insulating material. Forms are typically used, much like concrete, to pour walls. Once the material hardens, the forms can be removed and the outsides and insides of the walls can be finished with the desired product, such as NHL or Lime Paint.

Natural Hydraulic Lime over the Hempcrete is similar to applying it over a plaster on adobe or cob construction technique.

Hempcrete

Products

• Batichanvre
• NHL 3.5
• NHL 5

Making Hempcrete

• http://www.stastier.co.uk/nhl/guides/hempconstruction.htm

The number of bags is calculated with the following parameters:

• Hemp hurds density: 6.85 lbs/cu.ft.
• Mixing ratio: 1 bag of Batichanvre (25 kg) + 3.5 to 4.5 cu.ft. of hemp hurds.
• Density of cured hempcrete: 22 to 26 lbs/cu.ft. depending on compaction.

Plaster or Stucco on Hempcrete

Products

• NHL 2
• NHL 3.5
• NHL 5
• EcoMortar

Making Lime Mortars

• Preview the Making Lime Mortars Video Series
• Purchase The Making Lime Mortars Video Series

NHL General Guidelines

• The Five Most Important Steps
• NHL Plasters
• Plastering with NHL
• Sands for NHL Mortar
• NHL Mortar Preparation
• Plastering With a Spray Gun
• Plastering on Hempcrete
• Protecting Saint Astier® Natural Hydraulic Lime Mortar
• Consumption Charts
• Colors

PreMix General Guidelines

• The Five Most Important Steps
• Working With Ecomortar F
• Ecomortar F Ready Mix
• Ecomortar F Consumption Charts

NHL & Premix Architectural Specifications

• Specifications for Plaster on Hempcrete (pdf)
• Specifications for Plaster on Hempcrete (doc)

Project Links

• https://www.facebook.com/kailuahemphouse