Shuttering - The Hempcrete Topic: Designing and Building with Hemp-lime - page 284

This is essential to keep your plumb line true as you go up the wall, and also to give sup-
port to the last layer of hempcrete as the new layer is tamped down above it.
Temporary shuttering: method
The exact process for fixing temporary shuttering depends on the frame design and of
course the type of shuttering board used. The methods outlined here, which cover a range
of frame details, assume that OSB is being used.
Fixing shuttering to central frames
Where the frame is buried inside the hempcrete wall, the shuttering boards are fixed to the
frame with spacers and long screws. Spacers are usually made from strong 25mm plastic
pipe (such as waste pipe for plumbing applications) cut into lengths. This is done accur-
ately, with a chop saw, so that the spacers hold the shuttering away from the frame at the
exact distance that will be the final position of the face of the wall. As discussed in the last
chapter with regard to the positioning of a central frame (see page 166 ), careful design and
accurate construction of the frame can make this job easier by avoiding the need for small
variations in the size of spacers required at different points on the frame.