Floors, ceilings and roof insulation - The Hempcrete Topic: Designing and Building with Hemp-lime - page 381

Erecting shuttering for a hempcrete ceiling.
In comparison with conventional ceiling boards, a cast-in-situ hempcrete ceiling has a
number of advantages:
It provides insulation.
It reduces material costs.
It reduces the number of different materials used in the building, thereby reducing the
complexity of achieving airtightness.
It has the same environmental advantages of hempcrete in other applications - being
made from renewable materials with low embodied energy and relatively low transport
costs. In contrast, conventional ceiling boards consist of highly processed materials, of-
ten come from abroad, and may include glues and sealants that contain VOCs.
Another advantage of using cast hempcrete in ceilings, as with other applications, is that
it is an ideal background to plaster on to with lime or clay plasters, and provides a breath-
able ceiling which can help regulate humidity in the room. This is especially useful in bed-
rooms, where the majority of human-generated moisture is produced during the night, by
the occupants breathing in their sleep.