Bunkers for curing foamed polystyrene of various volumes are designed to dry granules of foamed polystyrene after the foaming procedure. It consists of a telescopic metal frame, which makes it possible to adjust the height and volume of the bunker, as well as a mesh insert with a cell of 1-2 mm. In the bunker, foamed granules are cured to stabilize the pressure inside the granules and are subsequently used in the production of polystyrene concrete or foam plastic.