The in spray construction the formwork only needs to be strong enough to support the concrete during the spray.
The formwork provides the outside lines of the pool & also the top level for the concrete.
In this photo, the pool is lined with 25mm (1") polystryene as the pool will be heated, this saves about 30-50% on heating costs.

Photo courtesy:
Clearview Pools, Adelaide, Australia. Ph Mobile 0418300400

Web Page written by:
Victor K de Fontenay © Sept 1998
Page Last updated 3.00pm 27th Sept 1998