The lost formwork system was developed and patented by Desjoyaux in 1978. The lost formwork consists of 25 cm wide elements that are assembled into the shape and size of a specific pool. In combination with concrete, the structure guarantees a long service life.

Advantages of Desjoyaux lost formwork:

• fast installation
• strength of polypropylene combined with concrete
• self-supporting structure
• monolithic frame achieved by concreting the bottom and walls at the same time
• no need to create a concrete slab
• resistance to frost, ground movement and high groundwater
• all shapes and sizes achieved by assembling the formwork
• concreting of the bottom and walls in a single day → monolithic structure → long service life