Shuttering - The Hempcrete Topic: Designing and Building with Hemp-lime - page 315

This option might at first seem a sensible route to go down, as the modules are very easy
and quick to assemble, keep the wall very straight and reduce wastage (if you are throwing
away your OSB when it gets too tatty, or has been cut up too small).
On the other hand, they are expensive to buy - so much so that you would only begin to
see a saving if you were doing a lot of large builds. They also need cleaning well after each
build, so that any bits of dried hempcrete on their surface will not stop them producing a
clean, straight wall on the next build, which is an extra job. Lastly, they are much bulkier
than thin wooden boards, and you would need to have lots of them, and therefore would
have to think about where to store them and how to transport them.
As described earlier in this chapter, at Hemp-LimeConstruct we have concluded that the
most practical and economical solution is to use OSB, since the finished wall it makes is
no worse or better than one formed with plastic shuttering. OSB is cheap, readily available
and easy to store, it's made (mostly) from natural materials, and you can reuse it many
times over as shuttering, and then use it in the building or build a shed with it afterwards.
Plastic reusable shuttering. Image: The Limecrete Company