hempcrete


How strong is hemp as a wall system?

Pretty darn strong, but it’s not concrete – it is a fraction of the weight, and about 1/20 of the compressive strength of concrete. Keep in mind that the hempcrete does not function as a structural component. In our region, we design for seismic zone 2a, and winds loads (typically) of 90mph. With certain limitations, […]

What is the R-value of Hempcrete?

The R-value varies with the density of the mix – the more binder, the less insulation. Additional binder increases the density of the material and hence its heat transmission properties. The mix that we typically specify has an R-value of about 2.4 For a 12” wall, yielding more than R-28 for the wall. There are […]

Can Hempcrete be used in a basement?

No way! Hempcrete is not a structural element and may not be used as a foundation material. As a wall and insulation system, a 1′ clearance to the ground is standard practice. If hempcrete is installed at grade level, moisture will become an issue. Hempcrete may be used as a finished interior wall inside the […]

Is Hemp Good for Net-Zero?

Hempcrete is not just an insulator; it prevents damp and mold growth, and buffers temperature and humidity, making the building a healthy environment. From an R-per-inch standpoint, there are many materials that have higher insulating values than Hemcrete®. Having said that, our hempcrete walls are typically specified as a minimum R-28. For our clients that […]

Does Hempcrete smell?

The part of the plant that is mixed with a binder is the woody stalk, referred to as shiv, or hurd. The raw shiv has an odor similar to many other dried plants, and smells a bit like farm straw…not marijuana.