This home features rigid continuous insulation board on the exterior of a hybrid timber frame/traditional frame construction. The Rockwool serves as permanent formwork for the 8″ of Ereasy insulation on the inside. Every penetrating joist and beam was wrapped and sealed prior to installation of the hempcrete so that the plaster alone would not have to bear the full burden for air tightness.

The client framed and built the home prior to our arrival and had installed magnesium oxide board on the interior surface of the walls as permanent formwork to which the hempcrete could be applied. Americhanvre supplied the project with Kanabat building grade hurd and an Ereasy Spray Applied Hempcrete unit purchased from Hempitecture, the distributor for Ereasy in the U.S., earlier in the year.

We were able to successfully demonstrate the process for spray application of hempcrete for a residential home, proving the method to be dramatically faster and less labor intensive than traditional cast in-situ hempcrete.