Hemp concrete or hempcrete is a mixture of hemp fibres, natural glue, and water. Hemp is a material that has been used for centuries for all kinds of objectives, from clothing to food to building materials. The plant is fast growing and its fibres are very strong.

Building with hemp has many advantages, as it has great acoustic and thermic insulation properties. The natural material is CO2 negative, removing more carbon dioxide from the atmosphere than it adds. Hemp concrete is vapour permeable, and fire-retardant thanks to the glue.