Hemplime assemblies are typically cast in place or sprayed on site (in situ), or built using prefabricated blocks or panels. Each has its advantages, but we chose the spray-applied method — where the hemplime is sprayed in between and around the framing to form a monolithic envelope — for the Cape Cod Hemp House because of the size of the project and our high thermal performance goals.

Spray-applied hemplime assemblies take less time to build than other methods and reduce energy loss caused by thermal bridging. Additionally, spray applied hemplime uses less lime binder and water, which further increases the R-value of the assembly while decreasing drying time.

Although not the first spray-applied hemplime project in the US, the Cape Cod Hemp House is the first in North America to employ a cutting-edge high-production system from Europe designed for larger projects.