Restoration and retrofit - The Hempcrete Topic: Designing and Building with Hemp-lime - page 461

Hempcrete can be used to fill small spaces and voids in
old buildings, like a natural building equivalent of expand-
ing foam.
Application method for hempcrete in heritage
buildings
The main differences in the application method compared to that described in previous
chapters, when it comes to working on heritage buildings, are in the framework and the
shuttering. The hempcrete will usually be cast inside the building, next to or around some
part of the original fabric, and while the interaction between the two materials can some-
times provide sufficient support, it is more usual for some form of frame to be screwed to
the original building to create a key, or a reinforcement structure, for the hempcrete. An
example would be a pattern of studs constructed within a timber-frame panel (as pictured
opposite), to sit centrally within the hempcrete panel and provide a key against lateral load-
ing from winds (see also Figure 15, page 276 ). Studs can also be attached to the inside of
the frame to take shuttering screws, if the frame is to be left exposed as a decorative fea-
ture.