Which is removed

Formwork is a flooring, usually from boards, to maintain a flat surface of the building, which is removed after the completion of work.

Non -removable formwork is made of hard polymer — polystyrene foam. At the construction site, walls of polymer blocks are built. Each block provides holes where liquid concrete is poured. After solidifying the solution, the panel remain part of the structure, playing the role of the heat insulator.