Shuttering - The Hempcrete Topic: Designing and Building with Hemp-lime - page 281

matically. Without the board at the back, more care would have to be taken to avoid
spilling the hempcrete.

• Having the whole wall boarded on the inside surface of the wall, when placing

hempcrete from outside, effectively stops any spillage into the building, keeping the
inside safe and tidy for other work to progress at the same time.

• The boarding out of the whole of one side of the wall can be done as soon as the

frame is up, i.e. in advance of the rest of the shuttering and hempcrete-placing
work. This speeds up the rate of hempcrete placing, as you are not held up by the
shuttering.

• If you board one side of the wall in full boards, this reduces the amount of time

spent cutting boards. It also leaves you with a lot of whole boards at the end of the
job, which are easier than small pieces to reuse. (But when a central frame is used,
shuttering with full boards also has its drawbacks - see page 177 . )

Wherever possible, you should aim to fill the tops of walls from above (through the
rafters), as this makes the job much quicker and more pleasant (without the risk of lime in
your eyes), and keeps the cutting of shuttering boards to a minimum, as there is no need
to cut smaller boards for the top of the wall. Where the hempcrete is being cast up to the
level of the top of the rafters, as it usually would be, run the shuttering board up to the
bottom of the rafters and then construct several 'lollipops' (we had to invent a word for
them!), which attach to the top of the last board to shutter the spaces between the rafters -
see photos below.