Indicative detailing - The Hempcrete Topic: Designing and Building with Hemp-lime - page 569

Masonry cladding on a hempcrete building. Note the ex-
ternal frame enabling the cladding to be tied in to the wall,
and the vapour-permeable membrane.
Masonry cladding with no vented cavity
One possibility that many people are discussing currently, but which has not yet been
proven in practice, is the idea of casting hempcrete directly up against masonry cladding,
with no cavity. This could be advantageous because, where a cladding is to be used anyway
for aesthetic reasons, this method simplifies the process and allows cost savings: on labour,
as the external temporary shuttering is not needed, and on materials (e.g. the membrane
and vents for the cavity).
To explore the effect this would have, it helps to compare the masonry cladding to a
vapour-permeable lime render, which is the standard finish for a hempcrete wall. Imagine